wip

core/src/main/java/jef/DbSet.java

@@ -4,19 +4,24 @@ import jef.expressions.Expression;
 import jef.expressions.SelectExpression;
 import jef.expressions.TableExpression;
 import jef.expressions.selectable.DatabaseSelectAllExpression;
+import jef.model.DbContext;
 import jef.serializable.SerializableObject;
 import lombok.Getter;
 
+import java.sql.SQLException;
 import java.util.Iterator;
 import java.util.List;
 import java.util.Spliterator;
 
 public class DbSet<T extends SerializableObject> implements Queryable<T> {
+    @Getter
+    private final DbContext context;
     @Getter
     private final Class<T> clazz;
     private final String table;
 
-    public DbSet(Class<T> clazz, String table) {
+    public DbSet(DbContext context, Class<T> clazz, String table) {
+        this.context = context;
         this.clazz = clazz;
         this.table = table;
     }
@@ -36,6 +41,23 @@ public class DbSet<T extends SerializableObject> implements Queryable<T> {
         return "SELECT * FROM `" + table + "`";
     }
 
+    @Override
+    public DbSet<T> originalSet() {
+        return this;
+    }
+
+    public void add(T entity) throws SQLException {
+        context.getDatabase().add(context, clazz, entity);
+    }
+
+    public void update(T entity) throws SQLException {
+        context.getDatabase().update(context, clazz, entity);
+    }
+
+    public void delete(T entity) throws SQLException {
+        context.getDatabase().delete(context, clazz, entity);
+    }
+
     @Override
     public Iterator<T> iterator() {
         return null;

core/src/main/java/jef/Queryable.java

@@ -6,13 +6,15 @@ import jef.operations.FilterOp;
 import jef.operations.LimitOp;
 import jef.operations.SortOp;
 import jef.serializable.SerializableFunction;
+import jef.serializable.SerializableObject;
 import jef.serializable.SerializablePredicate;
 
-import java.io.Serializable;
+import java.sql.SQLException;
 import java.util.Iterator;
+import java.util.List;
 import java.util.Spliterator;
 
-public interface Queryable<T extends Serializable> {
+public interface Queryable<T extends SerializableObject> {
 
     //TODO documentation
     //TODO table alias thing still not ready
@@ -22,6 +24,8 @@ public interface Queryable<T extends Serializable> {
 
     String toString();
 
+    DbSet<T> originalSet();
+
     //stream functions
     default Iterator<T> iterator() {
         return null;
@@ -131,6 +135,9 @@ public interface Queryable<T extends Serializable> {
 //    default Object[] toArray() {
 //        return new Object[0];
 //    }
+    default List<T> toList() throws SQLException {
+        return originalSet().getContext().getDatabase().queryExpression(originalSet().getContext(), originalSet().getClazz(), getExpression());
+    }
 //
 //    default <A> A[] toArray(IntFunction<A[]> intFunction) {
 //        return null;

core/src/main/java/jef/QueryableProxy.java

@@ -1,13 +1,13 @@
 package jef;
 
 import jef.expressions.Expression;
+import jef.serializable.SerializableObject;
 import jef.serializable.SerializablePredicate;
 
-import java.io.Serializable;
 import java.util.Iterator;
 import java.util.Spliterator;
 
-public class QueryableProxy<T extends Serializable> implements Queryable<T> {
+public class QueryableProxy<T extends SerializableObject> implements Queryable<T> {
     private final Queryable<T> delegate;
 
     public QueryableProxy(Queryable<T> delegate) {
@@ -24,6 +24,11 @@ public class QueryableProxy<T extends Serializable> implements Queryable<T> {
         return delegate.getExpression();
     }
 
+    @Override
+    public DbSet<T> originalSet() {
+        return delegate.originalSet();
+    }
+
     @Override
     public Iterator<T> iterator() {
         return delegate.iterator();

core/src/main/java/jef/asm/access/ClassAnalyzer.java

@@ -0,0 +1,26 @@
+package jef.asm.access;
+
+import jef.asm.access.model.ClassDescription;
+import org.objectweb.asm.ClassReader;
+import org.objectweb.asm.Opcodes;
+
+import java.io.IOException;
+
+public class ClassAnalyzer {
+    public ClassDescription analyze(Class clazz) {
+        return analyzeClass(clazz);
+    }
+
+    private ClassDescription analyzeClass(Class clazz) {
+        try (var is = clazz.getClassLoader().getResourceAsStream(clazz.getName().replace(".", "/") + ".class")) {
+            var result = new ClassDescription[1];
+            var byteCode = is.readAllBytes();
+            var reader = new ClassReader(byteCode);
+            var visitor = new ClassAnalyzerVisitor(Opcodes.ASM9, description -> result[0] = description);
+            reader.accept(visitor, 0);
+            return result[0];
+        } catch (IOException e) {
+            throw new RuntimeException(e);
+        }
+    }
+}

core/src/main/java/jef/asm/access/ClassAnalyzerVisitor.java

@@ -0,0 +1,69 @@
+package jef.asm.access;
+
+import jef.asm.access.model.ClassDescription;
+import jef.asm.access.model.ConstructorDescription;
+import jef.asm.access.model.FieldDescription;
+import jef.asm.access.model.GetterDescription;
+import jef.asm.access.model.SetterDescription;
+import org.objectweb.asm.ClassVisitor;
+import org.objectweb.asm.FieldVisitor;
+import org.objectweb.asm.MethodVisitor;
+import org.objectweb.asm.Opcodes;
+import org.objectweb.asm.Type;
+
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.List;
+import java.util.function.Consumer;
+
+class ClassAnalyzerVisitor extends ClassVisitor {
+    private final Consumer<ClassDescription> callback;
+
+    private String className;
+    private String superClassName;
+    private final List<FieldDescription> declaredFields = new ArrayList<>();
+    private final List<ConstructorDescription> declaredConstructor = new ArrayList<>();
+    private final List<GetterDescription> declaredGetters = new ArrayList<>();
+    private final List<SetterDescription> declaredSetters = new ArrayList<>();
+
+    protected ClassAnalyzerVisitor(int api, Consumer<ClassDescription> callback) {
+        super(api);
+        this.callback = callback;
+    }
+
+    protected ClassAnalyzerVisitor(int api, ClassVisitor classVisitor, Consumer<ClassDescription> callback) {
+        super(api, classVisitor);
+        this.callback = callback;
+    }
+
+    @Override
+    public void visit(int version, int access, String name, String signature, String superName, String[] interfaces) {
+        className = name.replace("/", ".");
+        superClassName = superName.replace("/", ".");
+        super.visit(version, access, name, signature, superName, interfaces);
+    }
+
+    @Override
+    public FieldVisitor visitField(int access, String name, String descriptor, String signature, Object value) {
+        declaredFields.add(new FieldDescription(className, name));
+        return super.visitField(access, name, descriptor, signature, value);
+    }
+
+    @Override
+    public MethodVisitor visitMethod(int access, String name, String descriptor, String signature, String[] exceptions) {
+        var type = Type.getMethodType(descriptor);
+        var returnClassName = type.getReturnType().getClassName();
+        var parameterClassNames = Arrays.stream(type.getArgumentTypes()).map(Type::getClassName).toArray(String[]::new);
+        return new MethodAnalyzerVisitor(Opcodes.ASM9, className, name, access, returnClassName, parameterClassNames, entityAccess -> {
+            declaredConstructor.addAll(entityAccess.getDeclaredConstructors());
+            declaredGetters.addAll(entityAccess.getDeclaredGetters());
+            declaredSetters.addAll(entityAccess.getDeclaredSetters());
+        });
+    }
+
+    @Override
+    public void visitEnd() {
+        super.visitEnd();
+        callback.accept(new ClassDescription(className, superClassName, declaredFields, declaredConstructor, declaredGetters, declaredSetters));
+    }
+}

core/src/main/java/jef/asm/access/MethodAnalyzerVisitor.java

@@ -0,0 +1,330 @@
+package jef.asm.access;
+
+import jef.asm.access.model.ClassDescription;
+import jef.asm.access.model.ConstructorDescription;
+import jef.asm.access.model.ConstructorParameterDescription;
+import jef.asm.access.model.GetterDescription;
+import jef.asm.access.model.SetterDescription;
+import jef.asm.access.model.SuperConstructorParameterDescription;
+import lombok.AllArgsConstructor;
+import lombok.Getter;
+import org.objectweb.asm.Handle;
+import org.objectweb.asm.Label;
+import org.objectweb.asm.MethodVisitor;
+import org.objectweb.asm.Opcodes;
+import org.objectweb.asm.Type;
+
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.List;
+import java.util.Set;
+import java.util.Stack;
+import java.util.function.Consumer;
+
+@Getter
+public class MethodAnalyzerVisitor extends MethodVisitor {//TODO verify param count
+    private final Consumer<ClassDescription> callback;
+    private final String declaringClassName;
+    private final String methodName;
+    private final int access;
+    private final String returnClassName;
+    private final String[] parameterClassNames;
+
+    private List<ConstructorParameterDescription> constructorParameterDescriptions = new ArrayList<>();
+    private List<SuperConstructorParameterDescription> superConstructorParameterDescriptions = new ArrayList<>();
+    private Stack<Var> varStack = new Stack<>();
+    private String fieldDeclaringClassName = null;
+    private String fieldName = null;
+
+    private ConstructorSteps constructorStep = ConstructorSteps.INIT;
+    private GetterSteps getterStep = GetterSteps.INIT;
+    private SetterSteps setterStep = SetterSteps.INIT;
+
+    enum ConstructorSteps {
+        INIT,
+        CODE,
+        PRE_SUPER_INIT_ALOAD_0,
+        PRE_SUPER_INIT_VAR_LOAD,
+        SUPER_INIT,
+        ALOAD_0,
+        VAR_LOAD,
+        PUT_FIELD,
+        RETURN,
+        INVALID
+    }
+
+    enum GetterSteps {
+        INIT,
+        CODE,
+        ALOAD_0,
+        GET_FIELD,
+        RETURN,
+        INVALID
+    }
+
+    enum SetterSteps {
+        INIT,
+        CODE,
+        ALOAD_0,
+        VAR_LOAD,
+        PUT_FIELD,
+        RETURN,
+        INVALID
+    }
+
+    protected MethodAnalyzerVisitor(int api, String declaringClassName, String methodName, int access, String returnClassName, String[] parameterClassNames, Consumer<ClassDescription> callback) {
+        super(api);
+        this.declaringClassName = declaringClassName;
+        this.methodName = methodName;
+        this.access = access;
+        this.returnClassName = returnClassName;
+        if (hasThis()) {
+            this.parameterClassNames = new String[parameterClassNames.length + 1];
+            System.arraycopy(parameterClassNames, 0, this.parameterClassNames, 1, parameterClassNames.length);
+            this.parameterClassNames[0] = declaringClassName;
+        } else {
+            this.parameterClassNames = parameterClassNames;
+        }
+        this.callback = callback;
+    }
+
+    @Override
+    public void visitCode() {
+        constructorStep = constructorStep == ConstructorSteps.INIT ? ConstructorSteps.CODE : ConstructorSteps.INVALID;
+        getterStep = getterStep == GetterSteps.INIT ? GetterSteps.CODE : GetterSteps.INVALID;
+        setterStep = setterStep == SetterSteps.INIT ? SetterSteps.CODE : SetterSteps.INVALID;
+        super.visitCode();
+    }
+
+    @Override
+    public void visitFrame(int type, int numLocal, Object[] local, int numStack, Object[] stack) {
+        constructorStep = ConstructorSteps.INVALID;
+        getterStep = GetterSteps.INVALID;
+        setterStep = SetterSteps.INVALID;
+        super.visitFrame(type, numLocal, local, numStack, stack);
+    }
+
+    @Override
+    public void visitInsn(int opcode) {
+        if (Set.of(Opcodes.IRETURN, Opcodes.LRETURN, Opcodes.FRETURN, Opcodes.DRETURN, Opcodes.ARETURN).contains(opcode)) {
+            getterStep = getterStep == GetterSteps.GET_FIELD ? GetterSteps.RETURN : GetterSteps.INVALID;
+        } else {
+            getterStep = GetterSteps.INVALID;
+        }
+        if (opcode == Opcodes.RETURN) {
+            constructorStep = constructorStep == ConstructorSteps.PUT_FIELD ? ConstructorSteps.RETURN : ConstructorSteps.INVALID;
+            setterStep = setterStep == SetterSteps.PUT_FIELD ? SetterSteps.RETURN : SetterSteps.INVALID;
+        } else {
+            constructorStep = ConstructorSteps.INVALID;
+            setterStep = SetterSteps.INVALID;
+        }
+        super.visitInsn(opcode);
+    }
+
+    @Override
+    public void visitIntInsn(int opcode, int operand) {
+        constructorStep = ConstructorSteps.INVALID;
+        getterStep = GetterSteps.INVALID;
+        setterStep = SetterSteps.INVALID;
+        super.visitIntInsn(opcode, operand);
+    }
+
+    @Override
+    public void visitVarInsn(int opcode, int varIndex) {
+        if (Set.of(Opcodes.ILOAD, Opcodes.LLOAD, Opcodes.FLOAD, Opcodes.DLOAD, Opcodes.ALOAD).contains(opcode)) {
+            System.out.println(methodName + ": load_" + varIndex + ": " + (varIndex < parameterClassNames.length ? parameterClassNames[varIndex] : null));
+            if (varIndex == 5) {
+                int x = 0;
+            }
+            varStack.push(new Var(varIndex < parameterClassNames.length ? parameterClassNames[varIndex] : null, varIndex));
+        }
+        if (opcode == Opcodes.ALOAD && varIndex == 0) {
+            if (constructorStep == ConstructorSteps.CODE) {
+                constructorStep = ConstructorSteps.PRE_SUPER_INIT_ALOAD_0;
+            } else if (constructorStep == ConstructorSteps.SUPER_INIT || constructorStep == ConstructorSteps.PUT_FIELD) {
+                constructorStep = ConstructorSteps.ALOAD_0;
+            } else {
+                constructorStep = ConstructorSteps.INVALID;
+            }
+        } else if (Set.of(Opcodes.ILOAD, Opcodes.LLOAD, Opcodes.FLOAD, Opcodes.DLOAD, Opcodes.ALOAD).contains(opcode)) {
+            if (constructorStep == ConstructorSteps.PRE_SUPER_INIT_ALOAD_0) {
+                constructorStep = ConstructorSteps.PRE_SUPER_INIT_VAR_LOAD;
+            } else if (constructorStep == ConstructorSteps.PRE_SUPER_INIT_VAR_LOAD) {
+                constructorStep = ConstructorSteps.PRE_SUPER_INIT_VAR_LOAD;
+            } else if (constructorStep == ConstructorSteps.ALOAD_0) {
+                constructorStep = ConstructorSteps.VAR_LOAD;
+            } else {
+                constructorStep = ConstructorSteps.INVALID;
+            }
+        } else {
+            constructorStep = ConstructorSteps.INVALID;
+        }
+        if (opcode == Opcodes.ALOAD && varIndex == 0) {
+            getterStep = getterStep == GetterSteps.CODE ? GetterSteps.ALOAD_0 : GetterSteps.INVALID;
+        } else {
+            getterStep = GetterSteps.INVALID;
+        }
+        if (opcode == Opcodes.ALOAD && varIndex == 0) {
+            setterStep = setterStep == SetterSteps.CODE ? SetterSteps.ALOAD_0 : SetterSteps.INVALID;
+        } else if (Set.of(Opcodes.ILOAD, Opcodes.LLOAD, Opcodes.FLOAD, Opcodes.DLOAD, Opcodes.ALOAD).contains(opcode)) {
+            setterStep = setterStep == SetterSteps.ALOAD_0 ? SetterSteps.VAR_LOAD : SetterSteps.INVALID;
+        } else {
+            setterStep = SetterSteps.INVALID;
+        }
+        super.visitVarInsn(opcode, varIndex);
+    }
+
+    private boolean hasThis() {
+        return (access & Opcodes.ACC_STATIC) == 0;
+    }
+
+    @Override
+    public void visitTypeInsn(int opcode, String type) {
+        constructorStep = ConstructorSteps.INVALID;
+        getterStep = GetterSteps.INVALID;
+        setterStep = SetterSteps.INVALID;
+        super.visitTypeInsn(opcode, type);
+    }
+
+    @Override
+    public void visitFieldInsn(int opcode, String owner, String name, String descriptor) {
+        Var lastLoadedVar = null;
+        if (opcode == Opcodes.PUTFIELD) {
+            lastLoadedVar = varStack.pop();
+            varStack.pop();
+            constructorStep = constructorStep == ConstructorSteps.VAR_LOAD ? ConstructorSteps.PUT_FIELD : ConstructorSteps.INVALID;
+            getterStep = GetterSteps.INVALID;
+            setterStep = setterStep == SetterSteps.VAR_LOAD ? SetterSteps.PUT_FIELD : SetterSteps.INVALID;
+        } else if (opcode == Opcodes.GETFIELD) {
+            lastLoadedVar = varStack.pop();
+            constructorStep = ConstructorSteps.INVALID;
+            getterStep = getterStep == GetterSteps.ALOAD_0 ? GetterSteps.GET_FIELD : GetterSteps.INVALID;
+            setterStep = SetterSteps.INVALID;
+        } else {
+            constructorStep = ConstructorSteps.INVALID;
+            getterStep = GetterSteps.INVALID;
+            setterStep = SetterSteps.INVALID;
+        }
+        this.fieldDeclaringClassName = owner.replace("/", ".");
+        this.fieldName = name;
+        this.constructorParameterDescriptions.add(new ConstructorParameterDescription(lastLoadedVar.getIndex() - 1, lastLoadedVar.getClassName(), this.fieldDeclaringClassName, this.fieldName)); //lastLoadedVar - 1 because arg 0 of an instance function is always this
+        super.visitFieldInsn(opcode, owner, name, descriptor);
+    }
+
+    @Override
+    public void visitMethodInsn(int opcode, String owner, String name, String descriptor, boolean isInterface) {
+        var args = new ArrayList<Var>();
+        for (var i = 0; i < Type.getArgumentTypes(descriptor).length; i++) {
+            args.add(0, varStack.pop());
+        }
+        varStack.pop(); // also pop ALOAD0
+        if (opcode == Opcodes.INVOKESPECIAL && name.equals("<init>") //TODO does it have to be called '<init>' or is this just convention
+                && Set.of(ConstructorSteps.PRE_SUPER_INIT_ALOAD_0, ConstructorSteps.PRE_SUPER_INIT_VAR_LOAD).contains(constructorStep)) {
+            for (int i = 0; i < args.size(); i++) {
+                superConstructorParameterDescriptions.add(new SuperConstructorParameterDescription(args.get(i).getIndex(), i));
+            }
+            constructorStep = ConstructorSteps.SUPER_INIT;
+        } else {
+            constructorStep = ConstructorSteps.INVALID;
+        }
+        getterStep = GetterSteps.INVALID;
+        setterStep = SetterSteps.INVALID;
+        super.visitMethodInsn(opcode, owner, name, descriptor, isInterface);
+    }
+
+    @Override
+    public void visitInvokeDynamicInsn(String name, String descriptor, Handle bootstrapMethodHandle, Object... bootstrapMethodArguments) {
+        constructorStep = ConstructorSteps.INVALID;
+        getterStep = GetterSteps.INVALID;
+        setterStep = SetterSteps.INVALID;
+        super.visitInvokeDynamicInsn(name, descriptor, bootstrapMethodHandle, bootstrapMethodArguments);
+    }
+
+    @Override
+    public void visitJumpInsn(int opcode, Label label) {
+        constructorStep = ConstructorSteps.INVALID;
+        getterStep = GetterSteps.INVALID;
+        setterStep = SetterSteps.INVALID;
+        super.visitJumpInsn(opcode, label);
+    }
+
+    @Override
+    public void visitLabel(Label label) {
+        super.visitLabel(label);
+    }
+
+    @Override
+    public void visitLdcInsn(Object value) {
+        constructorStep = ConstructorSteps.INVALID;
+        getterStep = GetterSteps.INVALID;
+        setterStep = SetterSteps.INVALID;
+        super.visitLdcInsn(value);
+    }
+
+    @Override
+    public void visitIincInsn(int varIndex, int increment) {
+        constructorStep = ConstructorSteps.INVALID;
+        getterStep = GetterSteps.INVALID;
+        setterStep = SetterSteps.INVALID;
+        super.visitIincInsn(varIndex, increment);
+    }
+
+    @Override
+    public void visitTableSwitchInsn(int min, int max, Label dflt, Label... labels) {
+        constructorStep = ConstructorSteps.INVALID;
+        getterStep = GetterSteps.INVALID;
+        setterStep = SetterSteps.INVALID;
+        super.visitTableSwitchInsn(min, max, dflt, labels);
+    }
+
+    @Override
+    public void visitLookupSwitchInsn(Label dflt, int[] keys, Label[] labels) {
+        constructorStep = ConstructorSteps.INVALID;
+        getterStep = GetterSteps.INVALID;
+        setterStep = SetterSteps.INVALID;
+        super.visitLookupSwitchInsn(dflt, keys, labels);
+    }
+
+    @Override
+    public void visitMultiANewArrayInsn(String descriptor, int numDimensions) {
+        constructorStep = ConstructorSteps.INVALID;
+        getterStep = GetterSteps.INVALID;
+        setterStep = SetterSteps.INVALID;
+        super.visitMultiANewArrayInsn(descriptor, numDimensions);
+    }
+
+    @Override
+    public void visitTryCatchBlock(Label start, Label end, Label handler, String type) {
+        constructorStep = ConstructorSteps.INVALID;
+        getterStep = GetterSteps.INVALID;
+        setterStep = SetterSteps.INVALID;
+        super.visitTryCatchBlock(start, end, handler, type);
+    }
+
+    @Override
+    public void visitLocalVariable(String name, String descriptor, String signature, Label start, Label end, int index) {
+        super.visitLocalVariable(name, descriptor, signature, start, end, index);
+    }
+
+    @Override
+    public void visitMaxs(int maxStack, int maxLocals) {
+        super.visitMaxs(maxStack, maxLocals);
+    }
+
+    @Override
+    public void visitEnd() {
+        super.visitEnd();
+        List<ConstructorDescription> constructors = constructorStep == ConstructorSteps.RETURN ? List.of(new ConstructorDescription(constructorParameterDescriptions, superConstructorParameterDescriptions)) : List.of();
+        List<GetterDescription> getters = getterStep == GetterSteps.RETURN ? List.of(new GetterDescription(declaringClassName, methodName, returnClassName, Arrays.stream(parameterClassNames).skip(hasThis() ? 1 : 0).toArray(String[]::new), fieldDeclaringClassName, fieldName)) : List.of();
+        List<SetterDescription> setters = setterStep == SetterSteps.RETURN ? List.of(new SetterDescription(declaringClassName, methodName, returnClassName, Arrays.stream(parameterClassNames).skip(hasThis() ? 1 : 0).toArray(String[]::new), fieldDeclaringClassName, fieldName)) : List.of();
+        var access = new ClassDescription(null, null, null, constructors, getters, setters);
+        callback.accept(access);
+    }
+
+    @AllArgsConstructor
+    @Getter
+    private static class Var {
+        private final String className;
+        private final int index;
+    }
+}

core/src/main/java/jef/asm/access/model/ClassDescription.java

@@ -0,0 +1,41 @@
+package jef.asm.access.model;
+
+import lombok.AllArgsConstructor;
+import lombok.Getter;
+
+import java.util.List;
+import java.util.stream.Collectors;
+
+@AllArgsConstructor
+@Getter
+public class ClassDescription {
+    private final String className;
+    private final String superClassName;
+    private final List<FieldDescription> declaredFields;
+    private final List<ConstructorDescription> declaredConstructors;
+    private final List<GetterDescription> declaredGetters;
+    private final List<SetterDescription> declaredSetters;
+
+    @Override
+    public String toString() {
+        return "ClassDescription{" +
+               "className='" + className + '\'' +
+               ", superClassName='" + superClassName + '\'' +
+               ", declaredFields=" + declaredFields +
+               ", declaredConstructors=" + declaredConstructors +
+               ", declaredGetters=" + declaredGetters +
+               ", declaredSetters=" + declaredSetters +
+               '}';
+    }
+
+    public String toStringFriendly() {
+        return "ClassAccessDescription{\n"
+               + "  className: " + className + '\n'
+               + "  superClassName: " + superClassName + '\n'
+               + "  declaredFields: " + declaredFields + '\n'
+               + "  declaredConstructors:\n" + declaredConstructors.stream().map(e -> "    " + e.toString() + '\n').collect(Collectors.joining())
+               + "  declaredGetters:\n" + declaredGetters.stream().map(e -> "    " + e.toString() + '\n').collect(Collectors.joining())
+               + "  declaredSetters:\n" + declaredSetters.stream().map(e -> "    " + e.toString()+ '\n').collect(Collectors.joining())
+               + '}';
+    }
+}

core/src/main/java/jef/asm/access/model/ConstructorDescription.java

@@ -0,0 +1,15 @@
+package jef.asm.access.model;
+
+import lombok.AllArgsConstructor;
+import lombok.Getter;
+import lombok.ToString;
+
+import java.util.List;
+
+@AllArgsConstructor
+@Getter
+@ToString
+public class ConstructorDescription {
+    private final List<ConstructorParameterDescription> constructorParameterDescriptions;
+    private final List<SuperConstructorParameterDescription> superConstructorParameterDescriptions;
+}

core/src/main/java/jef/asm/access/model/ConstructorParameterDescription.java

@@ -0,0 +1,15 @@
+package jef.asm.access.model;
+
+import lombok.AllArgsConstructor;
+import lombok.Getter;
+import lombok.ToString;
+
+@AllArgsConstructor
+@Getter
+@ToString
+public class ConstructorParameterDescription {
+    private final int parameterIndex;
+    private final String parameterClassName;
+    private final String declaringClassName;
+    private final String fieldName;
+}

core/src/main/java/jef/asm/access/model/FieldDescription.java

@@ -0,0 +1,13 @@
+package jef.asm.access.model;
+
+import lombok.AllArgsConstructor;
+import lombok.Getter;
+import lombok.ToString;
+
+@AllArgsConstructor
+@Getter
+@ToString
+public class FieldDescription {
+    private final String fieldDeclaringClassName;
+    private final String fieldName;
+}

core/src/main/java/jef/asm/access/model/GetterDescription.java

@@ -0,0 +1,17 @@
+package jef.asm.access.model;
+
+import lombok.AllArgsConstructor;
+import lombok.Getter;
+import lombok.ToString;
+
+@AllArgsConstructor
+@Getter
+@ToString
+public class GetterDescription {
+    private final String methodDeclaringClassName;
+    private final String methodName;
+    private final String methodReturnClassName;
+    private final String[] methodParameterClassNames;
+    private final String fieldDeclaringClassName;
+    private final String fieldName;
+}

core/src/main/java/jef/asm/access/model/SetterDescription.java

@@ -0,0 +1,17 @@
+package jef.asm.access.model;
+
+import lombok.AllArgsConstructor;
+import lombok.Getter;
+import lombok.ToString;
+
+@AllArgsConstructor
+@Getter
+@ToString
+public class SetterDescription {
+    private final String methodDeclaringClassName;
+    private final String methodName;
+    private final String methodReturnClassName;
+    private final String[] methodParameterClassNames;
+    private final String fieldDeclaringClassName;
+    private final String fieldName;
+}

core/src/main/java/jef/asm/access/model/SuperConstructorParameterDescription.java

@@ -0,0 +1,13 @@
+package jef.asm.access.model;
+
+import lombok.AllArgsConstructor;
+import lombok.Getter;
+import lombok.ToString;
+
+@AllArgsConstructor
+@Getter
+@ToString
+public class SuperConstructorParameterDescription {
+    private final int constructorParameterIndex;
+    private final int superConstructorParameterIndex;
+}

core/src/main/java/jef/model/DbContext.java

@@ -40,7 +40,7 @@ public abstract class DbContext {
             f.setAccessible(true);
             Clazz anno = f.getAnnotation(Clazz.class);
             try {
-                f.set(this, new DbSet(anno.value(), f.getName()));//TODO use table name from modelbuilder
+                f.set(this, new DbSet(this, anno.value(), f.getName()));//TODO use table name from modelbuilder
             } catch (IllegalAccessException e) {
                 throw new RuntimeException(e);
             }

core/src/main/java/jef/model/annotations/Generated.java

@@ -15,7 +15,7 @@ public @interface Generated {
     enum Type {
         NONE,//no value is generated
         IDENTITY,//value is generated on insert
-//        COMPUTED,//value is generated on insert and update
+        COMPUTED,//value is generated on insert and update
         ;
     }
 }

core/src/main/java/jef/operations/FilterOp.java

@@ -1,5 +1,6 @@
 package jef.operations;
 
+import jef.DbSet;
 import jef.Queryable;
 import jef.asm.AsmParseException;
 import jef.asm.OptimizedAsmParser;
@@ -8,13 +9,13 @@ import jef.expressions.SelectExpression;
 import jef.expressions.WhereExpression;
 import jef.expressions.modifier.TableAliasInjector;
 import jef.expressions.selectable.DatabaseSelectAllExpression;
+import jef.serializable.SerializableObject;
 import jef.serializable.SerializablePredicate;
 
-import java.io.Serializable;
 import java.util.List;
 import java.util.function.Predicate;
 
-public class FilterOp<T extends Serializable> implements Queryable<T>, Operation<T> {
+public class FilterOp<T extends SerializableObject> implements Queryable<T>, Operation<T> {
 
     private final Queryable<T> queryable;
     private final Predicate<? super T> predicate;
@@ -50,4 +51,9 @@ public class FilterOp<T extends Serializable> implements Queryable<T>, Operation
     public String toString() {
         return getExpression().toString();
     }
+
+    @Override
+    public DbSet<T> originalSet() {
+        return queryable.originalSet();
+    }
 }

core/src/main/java/jef/operations/LimitOp.java

@@ -1,15 +1,16 @@
 package jef.operations;
 
+import jef.DbSet;
 import jef.Queryable;
 import jef.expressions.Expression;
 import jef.expressions.LimitExpression;
 import jef.expressions.SelectExpression;
 import jef.expressions.selectable.DatabaseSelectAllExpression;
+import jef.serializable.SerializableObject;
 
-import java.io.Serializable;
 import java.util.List;
 
-public class LimitOp<T extends Serializable> implements Queryable<T> {
+public class LimitOp<T extends SerializableObject> implements Queryable<T> {
     private final Queryable<T> queryable;
     private Long start;
     private Long count;
@@ -35,6 +36,11 @@ public class LimitOp<T extends Serializable> implements Queryable<T> {
         return getExpression().toString();
     }
 
+    @Override
+    public DbSet<T> originalSet() {
+        return queryable.originalSet();
+    }
+
     @Override
     public Queryable<T> limit(long l) {
         count = l;

core/src/main/java/jef/operations/Operation.java

@@ -1,9 +1,8 @@
 package jef.operations;
 
 import jef.Queryable;
+import jef.serializable.SerializableObject;
 
-import java.io.Serializable;
-
-public interface Operation<T extends Serializable> extends Queryable<T> {
+public interface Operation<T extends SerializableObject> extends Queryable<T> {//TODO is this class required
 
 }

core/src/main/java/jef/operations/SortOp.java

@@ -1,5 +1,6 @@
 package jef.operations;
 
+import jef.DbSet;
 import jef.Queryable;
 import jef.asm.AsmParseException;
 import jef.asm.AsmParser;
@@ -13,14 +14,14 @@ import jef.expressions.modifier.TableAliasInjector;
 import jef.expressions.modifier.TernaryRewriter;
 import jef.expressions.selectable.DatabaseSelectAllExpression;
 import jef.serializable.SerializableFunction;
+import jef.serializable.SerializableObject;
 import lombok.AllArgsConstructor;
 
-import java.io.Serializable;
 import java.util.ArrayList;
 import java.util.List;
 
 @AllArgsConstructor
-public class SortOp<T extends Serializable> implements Queryable<T> {
+public class SortOp<T extends SerializableObject> implements Queryable<T> {
     private final Queryable<T> queryable;
     private final List<OrderExpression.Sort> sorts = new ArrayList<>();
 
@@ -45,6 +46,11 @@ public class SortOp<T extends Serializable> implements Queryable<T> {
         return getExpression().toString();
     }
 
+    @Override
+    public DbSet<T> originalSet() {
+        return queryable.originalSet();
+    }
+
     public SortOp<T> thenSorted(SerializableFunction<? super T, ?> fieldSelector) {
         var f = parseFunction(fieldSelector);
         this.sorts.add(new OrderExpression.Sort(f, OrderExpression.SortDirection.ASCENDING));

core/src/main/java/jef/platform/base/Database.java

@@ -1,25 +1,96 @@
 package jef.platform.base;
 
 import jef.MigrationException;
+import jef.expressions.Expression;
+import jef.model.DbContext;
+import jef.model.DbFieldBuilder;
+import jef.model.ModelBuilder;
+import jef.serializable.SerializableObject;
 import lombok.AllArgsConstructor;
 import lombok.Getter;
 
+import java.lang.reflect.Field;
+import java.lang.reflect.InvocationTargetException;
 import java.sql.Connection;
+import java.sql.PreparedStatement;
+import java.sql.ResultSet;
+import java.sql.SQLException;
+import java.util.ArrayList;
+import java.util.List;
 
 @Getter
 @AllArgsConstructor
 public abstract class Database {
-    //    private final DatabaseConfiguration config;
     protected final Connection connection;
     protected final DatabaseOptions options;
 
     public abstract void migrate() throws MigrationException;
 
-//    public ResultSet executeRaw(String s) throws SQLException {
-//        try (var stmt = connection.prepareStatement(s)) {
-//            try (var res = stmt.executeQuery()) {
-//                return res;
-//            }
-//        }
-//    }
+    public abstract <T extends SerializableObject> List<T> queryExpression(DbContext context, Class<T> clazz, Expression expression) throws SQLException;
+
+    public <T extends SerializableObject> List<T> queryRaw(DbContext context, Class<T> clazz, String query) throws SQLException {
+        var modelBuilder = ModelBuilder.from(context.getClass());
+        var entity = modelBuilder.entity(clazz);
+        var fields = entity.fields();
+        try (var stmt = connection.prepareStatement(query)) {
+            return queryRaw(stmt, clazz, fields);
+        }
+    }
+
+    protected <T extends SerializableObject> List<T> queryRaw(PreparedStatement stmt, Class<T> clazz, List<DbFieldBuilder<?>> fields) throws SQLException {
+        try (var result = stmt.executeQuery()) {
+            var ret = new ArrayList<T>();
+            while (result.next()) {
+                ret.add(readRow(result, clazz, fields));
+            }
+            return ret;
+        }
+    }
+
+    protected <T extends SerializableObject> T readRow(ResultSet res, Class<T> clazz, List<DbFieldBuilder<?>> fields) throws SQLException {
+        //TODO replace with by runtime generated class
+        try {
+            var model = (T) clazz.getConstructor().newInstance();
+            for (DbFieldBuilder<?> field : fields) {
+                if (!field.getField().isDatabaseField()) {
+                    continue;
+                }
+                Field f = field.getField().getField();
+                if (f == null) {
+                    System.out.println("not class member for " + field.getField().getName());
+                    continue;
+                }
+                f.setAccessible(true);
+                if (field.getField().getType() == String.class) {
+                    f.set(model, res.getString(f.getName()));
+                } else if (field.getField().getType() == byte.class || field.getField().getType() == Byte.class) {
+                    f.set(model, res.getByte(f.getName()));
+                } else if (field.getField().getType() == char.class || field.getField().getType() == Character.class) {
+//                    f.set(model, res.getString(f.getName()));//TODO handle char
+                    throw new UnsupportedOperationException("char");
+                } else if (field.getField().getType() == short.class || field.getField().getType() == Short.class) {
+                    f.set(model, res.getShort(f.getName()));
+                } else if (field.getField().getType() == int.class || field.getField().getType() == Integer.class) {
+                    f.set(model, res.getInt(f.getName()));
+                } else if (field.getField().getType() == long.class || field.getField().getType() == Long.class) {
+                    f.set(model, res.getLong(f.getName()));
+                } else if (field.getField().getType() == float.class || field.getField().getType() == Float.class) {
+                    f.set(model, res.getFloat(f.getName()));
+                } else if (field.getField().getType() == double.class || field.getField().getType() == Double.class) {
+                    f.set(model, res.getDouble(f.getName()));
+                } else {
+                    throw new UnsupportedOperationException();
+                }
+            }
+            return model;
+        } catch (IllegalAccessException | InvocationTargetException | InstantiationException | NoSuchMethodException e) {//TODO better handling
+            throw new RuntimeException(e);
+        }
+    }
+
+    public abstract <T extends SerializableObject> void add(DbContext context, Class<T> clazz, T model) throws SQLException;
+
+    public abstract <T extends SerializableObject> void update(DbContext context, Class<T> clazz, T model) throws SQLException;
+
+    public abstract <T extends SerializableObject> void delete(DbContext context, Class<T> clazz, T model) throws SQLException;
 }

core/src/main/java/jef/platform/dummy/DummyDatabase.java

@@ -1,7 +1,13 @@
 package jef.platform.dummy;
 
 import jef.MigrationException;
+import jef.expressions.Expression;
+import jef.model.DbContext;
 import jef.platform.base.Database;
+import jef.serializable.SerializableObject;
+
+import java.sql.SQLException;
+import java.util.List;
 
 public class DummyDatabase extends Database {
     public DummyDatabase() {
@@ -11,4 +17,28 @@ public class DummyDatabase extends Database {
     @Override
     public void migrate() throws MigrationException {
     }
+
+    @Override
+    public <T extends SerializableObject> List<T> queryExpression(DbContext context, Class<T> clazz, Expression expression) {
+        return List.of();
+    }
+
+    @Override
+    public <T extends SerializableObject> List<T> queryRaw(DbContext context, Class<T> clazz, String query) {
+        return List.of();
+    }
+
+    @Override
+    public <T extends SerializableObject> void add(DbContext context, Class<T> clazz, T entity) throws SQLException {
+    }
+
+    @Override
+    public <T extends SerializableObject> void update(DbContext context, Class<T> clazz, T model) throws SQLException {
+
+    }
+
+    @Override
+    public <T extends SerializableObject> void delete(DbContext context, Class<T> clazz, T model) throws SQLException {
+
+    }
 }

core/src/main/java/jef/util/Util.java

@@ -26,6 +26,11 @@ public abstract class Util {
         R apply(T t, U u) throws Throwable;
     }
 
+    @FunctionalInterface
+    public interface ThrowableBiConsumer<T, U> {
+        void accept(T t, U u) throws Throwable;
+    }
+
     public interface Equality<T> {
         boolean check(T t1, T t2);
     }

core/src/test/java/jef/asm/access/ClassAnalyzerTest.java

@@ -0,0 +1,58 @@
+package jef.asm.access;
+
+import jef.model.ModelBuilder;
+import jef.model.annotations.ForeignKey;
+import jef.serializable.SerializableObject;
+import lombok.AllArgsConstructor;
+import lombok.EqualsAndHashCode;
+import lombok.Getter;
+import lombok.NoArgsConstructor;
+import lombok.Setter;
+import lombok.ToString;
+import org.junit.jupiter.api.Test;
+
+import java.sql.Connection;
+import java.sql.SQLException;
+import java.sql.Statement;
+
+class ClassAnalyzerTest {
+
+    @Test
+    void analyze() {
+        var analyzer = new ClassAnalyzer();
+        var result = analyzer.analyze(Employee.class);
+        System.out.println(result.toStringFriendly());
+    }
+
+    @Getter
+    @Setter
+    @AllArgsConstructor
+    @NoArgsConstructor
+    @ToString
+    @EqualsAndHashCode(callSuper = false)
+    public static class Company extends SerializableObject {
+        private int id;
+        private String name;
+
+        private Employee ceo;
+    }
+
+    @Getter
+    @Setter
+    @AllArgsConstructor
+    @NoArgsConstructor
+    @ToString
+    @EqualsAndHashCode(callSuper = false)
+    public static class Employee extends SerializableObject {
+        private int id;
+        private String name;
+
+        private Employee boss;
+        @ForeignKey(getterOrField = "boss")
+        private int bossId;
+
+        private Company company;
+        @ForeignKey(getterOrField = "company")
+        private int companyId;
+    }
+}

core/src/test/java/jef/operations/FilterOpTest.java

@@ -13,7 +13,7 @@ public class FilterOpTest {
     @Test
     public void testSimple() {
         String act;
-        act = new DbSet<>(TestClass.class, "table1")
+        act = new DbSet<>(null, TestClass.class, "table1")
                 .filter(e -> true)
                 .toString();
         Assertions.assertEquals("SELECT * FROM (SELECT * FROM `table1`) a WHERE 1", act);
@@ -23,7 +23,7 @@ public class FilterOpTest {
     public void testMultipleFilter() {
         String act;
         var s = List.of(1, 3);
-        act = new DbSet<>(TestClass.class, "table1")
+        act = new DbSet<>(null, TestClass.class, "table1")
                 .filter(e -> s.contains(e.i))
                 .filter(e -> e.i == 1337)
                 .toString();

core/src/test/java/jef/operations/LimitOpTest.java

@@ -8,25 +8,25 @@ public class LimitOpTest {
     @Test
     public void test() {
         String act;
-        act = new DbSet<>(FilterOpTest.TestClass.class, "table1")
+        act = new DbSet<>(null, FilterOpTest.TestClass.class, "table1")
                 .limit(10).skip(5)
                 .toString();
         Assertions.assertEquals("SELECT * FROM (SELECT * FROM `table1`) a OFFSET 5 LIMIT 10", act);
 
 
-        act = new DbSet<>(FilterOpTest.TestClass.class, "table1")
+        act = new DbSet<>(null, FilterOpTest.TestClass.class, "table1")
                 .skip(5).limit(10)
                 .toString();
         Assertions.assertEquals("SELECT * FROM (SELECT * FROM `table1`) a OFFSET 5 LIMIT 10", act);
 
 
-        act = new DbSet<>(FilterOpTest.TestClass.class, "table1")
+        act = new DbSet<>(null, FilterOpTest.TestClass.class, "table1")
                 .skip(5)
                 .toString();
         Assertions.assertEquals("SELECT * FROM (SELECT * FROM `table1`) a OFFSET 5", act);
 
 
-        act = new DbSet<>(FilterOpTest.TestClass.class, "table1")
+        act = new DbSet<>(null, FilterOpTest.TestClass.class, "table1")
                 .limit(10)
                 .toString();
         Assertions.assertEquals("SELECT * FROM (SELECT * FROM `table1`) a LIMIT 10", act);

core/src/test/java/jef/operations/SortOpTest.java

@@ -8,27 +8,27 @@ class SortOpTest {
     @Test
     public void test() {
         String act;
-        act = new DbSet<>(FilterOpTest.TestClass.class, "table1")
+        act = new DbSet<>(null, FilterOpTest.TestClass.class, "table1")
                 .sorted(e -> e.getI()).thenSorted(e -> e.getD()).thenSorted(e -> e.getF()).thenSorted(e -> e.getL()).thenSorted(e -> e.getO())
                 .toString();
         Assertions.assertEquals("SELECT * FROM (SELECT * FROM `table1`) a ORDER BY `a`.`i` ASC, `a`.`d` ASC, `a`.`f` ASC, `a`.`l` ASC, `a`.`o` ASC", act);
 
 
-        act = new DbSet<>(FilterOpTest.TestClass.class, "table1")
+        act = new DbSet<>(null, FilterOpTest.TestClass.class, "table1")
                 .sortedDescending(e -> e.getI()).thenSortedDescending(e -> e.getD()).thenSortedDescending(e -> e.getF())
                 /**/.thenSortedDescending(e -> e.getL()).thenSortedDescending(e -> e.getO())
                 .toString();
         Assertions.assertEquals("SELECT * FROM (SELECT * FROM `table1`) a ORDER BY `a`.`i` DESC, `a`.`d` DESC, `a`.`f` DESC, `a`.`l` DESC, `a`.`o` DESC", act);
 
         //alternating patterns
-        act = new DbSet<>(FilterOpTest.TestClass.class, "table1")
+        act = new DbSet<>(null, FilterOpTest.TestClass.class, "table1")
                 .sortedDescending(e -> e.getI()).thenSorted(e -> e.getD()).thenSortedDescending(e -> e.getF()).thenSorted(e -> e.getL())
                 /**/.thenSortedDescending(e -> e.getO())
                 .toString();
         Assertions.assertEquals("SELECT * FROM (SELECT * FROM `table1`) a ORDER BY `a`.`i` DESC, `a`.`d` ASC, `a`.`f` DESC, `a`.`l` ASC, `a`.`o` DESC", act);
 
 
-        act = new DbSet<>(FilterOpTest.TestClass.class, "table1")
+        act = new DbSet<>(null, FilterOpTest.TestClass.class, "table1")
                 .sorted(e -> e.getI()).thenSortedDescending(e -> e.getD()).thenSorted(e -> e.getF()).thenSortedDescending(e -> e.getL())
                 /**/.thenSorted(e -> e.getO())
                 .toString();

core/src/test/java/jef/visitors/DebugExpressionVisitorTest.java

@@ -12,11 +12,11 @@ class DebugExpressionVisitorTest {
     @Test
     public void test() {
         var s = List.of(1, 3);
-        Queryable<FilterOpTest.TestClass> q = new DbSet<>(FilterOpTest.TestClass.class, "table1")
+        Queryable<FilterOpTest.TestClass> q = new DbSet<>(null, FilterOpTest.TestClass.class, "table1")
                 .filter(e -> s.contains(e.i) && e.i == 1337 && e.i == 420);
         new DebugExpressionVisitor().visit(q.getExpression());
 
-        Queryable<FilterOpTest.TestClass> q2 = new DbSet<>(FilterOpTest.TestClass.class, "table1")
+        Queryable<FilterOpTest.TestClass> q2 = new DbSet<>(null, FilterOpTest.TestClass.class, "table1")
                 .filter(e -> s.contains(e.i) || e.i == 1337);
         new DebugExpressionVisitor().visit(q2.getExpression());
     }

mysql/src/main/java/jef/platform/mysql/MysqlDatabase.java

@@ -1,13 +1,30 @@
 package jef.platform.mysql;
 
 import jef.MigrationException;
+import jef.expressions.Expression;
+import jef.model.DbContext;
+import jef.model.DbField;
+import jef.model.DbFieldBuilder;
+import jef.model.ModelBuilder;
 import jef.platform.base.Database;
 import jef.platform.base.DatabaseOptions;
+import jef.platform.mysql.query.MysqlQueryBuilder;
+import jef.serializable.SerializableObject;
+import jef.util.Util;
 
+import java.lang.reflect.Field;
 import java.sql.Connection;
+import java.sql.PreparedStatement;
+import java.sql.SQLException;
+import java.sql.Statement;
+import java.sql.Types;
+import java.util.ArrayList;
+import java.util.List;
+import java.util.stream.Collectors;
 
 public class MysqlDatabase extends Database {
     private final MysqlPlatform platform;
+
     public MysqlDatabase(Connection connection, DatabaseOptions options, MysqlPlatform platform) {
         super(connection, options);
         this.platform = platform;
@@ -17,4 +34,300 @@ public class MysqlDatabase extends Database {
     public void migrate() throws MigrationException {
         platform.getMigrationApplier(connection, options).migrate();
     }
+
+    @Override
+    public <T extends SerializableObject> List<T> queryExpression(DbContext context, Class<T> clazz, Expression expression) throws SQLException {
+        MysqlQueryBuilder queryBuilder = new MysqlQueryBuilder();
+        queryBuilder.visit(expression);
+        return queryRaw(context, clazz, queryBuilder.getQuery());
+    }
+
+    @Override
+    public <T extends SerializableObject> void add(DbContext context, Class<T> clazz, T model) throws SQLException {
+        var modelBuilder = ModelBuilder.from(context.getClass());
+        var entity = modelBuilder.entity(clazz);
+
+        var columns = new ArrayList<String>();
+        var valueBinders = new ArrayList<Util.ThrowableBiConsumer<PreparedStatement, Integer>>();
+
+        for (DbFieldBuilder<?> field : entity.fields()) {
+            Field f = field.getField().getField();
+            if (f == null) {
+                if (field.getField().isDatabaseField()) {
+                    columns.add(field.getField().getName());
+                    valueBinders.add((stmt, i) -> stmt.setNull(i, Types.INTEGER));//TODO set proper type
+                }
+                continue;
+            }
+
+            if (!field.getField().isDatabaseField()) {
+                continue;
+            }
+
+            f.setAccessible(true);
+
+            columns.add(field.getField().getName());
+            try {
+                if (f.get(model) == null) {
+                    valueBinders.add((stmt, i) -> stmt.setNull(i, Types.INTEGER));
+                } else if (field.getField().getType() == String.class) {
+                    valueBinders.add((stmt, i) -> stmt.setString(i, (String) f.get(model)));
+                } else if (field.getField().getType() == byte.class || field.getField().getType() == Byte.class) {
+                    valueBinders.add((stmt, i) -> stmt.setByte(i, (byte) f.get(model)));
+                } else if (field.getField().getType() == char.class || field.getField().getType() == Character.class) {
+//                    valueSetters.add((stmt, i) -> stmt.setString(i, (char) f.get(model)));//TODO handle char
+                    throw new UnsupportedOperationException("char");
+                } else if (field.getField().getType() == short.class || field.getField().getType() == Short.class) {
+                    valueBinders.add((stmt, i) -> stmt.setShort(i, (short) f.get(model)));
+                } else if (field.getField().getType() == int.class || field.getField().getType() == Integer.class) {
+                    valueBinders.add((stmt, i) -> stmt.setInt(i, (int) f.get(model)));
+                } else if (field.getField().getType() == long.class || field.getField().getType() == Long.class) {
+                    valueBinders.add((stmt, i) -> stmt.setLong(i, (long) f.get(model)));
+                } else if (field.getField().getType() == float.class || field.getField().getType() == Float.class) {
+                    valueBinders.add((stmt, i) -> stmt.setFloat(i, (float) f.get(model)));
+                } else if (field.getField().getType() == double.class || field.getField().getType() == Double.class) {
+                    valueBinders.add((stmt, i) -> stmt.setDouble(i, (double) f.get(model)));
+                } else {
+                    throw new UnsupportedOperationException();
+                }
+            } catch (IllegalAccessException e) {
+                throw new RuntimeException(e);
+            }
+        }
+
+        var columnsString = columns.stream().map(e -> "`" + e + "`").collect(Collectors.joining(","));
+        var placeholdersString = columns.stream().map(e -> "?").collect(Collectors.joining(","));
+        var query = "INSERT INTO `" + entity.name() + "` (" + columnsString + ") VALUES (" + placeholdersString + ")";
+        try (var stmt = connection.prepareStatement(query, Statement.RETURN_GENERATED_KEYS)) {
+            var i = 1;
+            for (Util.ThrowableBiConsumer<PreparedStatement, Integer> valueBinder : valueBinders) {
+                try {
+                    valueBinder.accept(stmt, i++);
+                } catch (Throwable e) {
+                    if (e instanceof SQLException) {
+                        throw (SQLException) e;
+                    }
+                    throw new IllegalStateException("This may not happen", e);
+                }
+            }
+            var added = stmt.executeUpdate();
+            if (added != 1) {
+                throw new SQLException("Failed to insert entity");
+            }
+            try (var res = stmt.getGeneratedKeys()) {
+                var primary = entity.getEntity().getPrimaryKey();
+                if (primary != null) {
+                    if (!res.next()) {
+                        throw new SQLException("Failed to add entity");
+                    }
+                    var idField = primary.getFields().get(0);//TODO this only supports primary keys, and only with one column
+                    idField.getField().setAccessible(true);
+                    if (idField.getField().getType() == int.class || idField.getField().getType() == Integer.class) {//TODO support more types
+                        idField.getField().set(model, res.getInt(1));
+                    } else if (idField.getField().getType() == long.class || idField.getField().getType() == Long.class) {
+                        idField.getField().set(model, res.getLong(1));
+                    } else {
+                        throw new UnsupportedOperationException();
+                    }
+                }
+            } catch (IllegalAccessException e) {
+                throw new RuntimeException(e);
+            }
+        }
+    }
+
+    @Override
+    public <T extends SerializableObject> void update(DbContext context, Class<T> clazz, T model) throws SQLException {
+        var modelBuilder = ModelBuilder.from(context.getClass());
+        var entity = modelBuilder.entity(clazz);
+        if (entity.getEntity().getPrimaryKey() == null) {
+            throw new UnsupportedOperationException("Primary key required for updates");//at least for now
+        }
+
+        var columns = new ArrayList<String>();
+        var valueBinders = new ArrayList<Util.ThrowableBiConsumer<PreparedStatement, Integer>>();
+
+        for (DbFieldBuilder<?> field : entity.fields()) {
+            Field f = field.getField().getField();
+            if (f == null) {
+                if (field.getField().isDatabaseField()) {
+                    columns.add(field.getField().getName());
+                    valueBinders.add((stmt, i) -> stmt.setNull(i, Types.INTEGER));//TODO set proper type
+                }
+                continue;
+            }
+
+            if (!field.getField().isDatabaseField()) {
+                continue;
+            }
+
+            f.setAccessible(true);
+
+            columns.add(field.getField().getName());
+            try {
+                if (f.get(model) == null) {
+                    valueBinders.add((stmt, i) -> stmt.setNull(i, Types.INTEGER));
+                } else if (field.getField().getType() == String.class) {
+                    valueBinders.add((stmt, i) -> stmt.setString(i, (String) f.get(model)));
+                } else if (field.getField().getType() == byte.class || field.getField().getType() == Byte.class) {
+                    valueBinders.add((stmt, i) -> stmt.setByte(i, (byte) f.get(model)));
+                } else if (field.getField().getType() == char.class || field.getField().getType() == Character.class) {
+//                    valueSetters.add((stmt, i) -> stmt.setString(i, (char) f.get(model)));//TODO handle char
+                    throw new UnsupportedOperationException("char");
+                } else if (field.getField().getType() == short.class || field.getField().getType() == Short.class) {
+                    valueBinders.add((stmt, i) -> stmt.setShort(i, (short) f.get(model)));
+                } else if (field.getField().getType() == int.class || field.getField().getType() == Integer.class) {
+                    valueBinders.add((stmt, i) -> stmt.setInt(i, (int) f.get(model)));
+                } else if (field.getField().getType() == long.class || field.getField().getType() == Long.class) {
+                    valueBinders.add((stmt, i) -> stmt.setLong(i, (long) f.get(model)));
+                } else if (field.getField().getType() == float.class || field.getField().getType() == Float.class) {
+                    valueBinders.add((stmt, i) -> stmt.setFloat(i, (float) f.get(model)));
+                } else if (field.getField().getType() == double.class || field.getField().getType() == Double.class) {
+                    valueBinders.add((stmt, i) -> stmt.setDouble(i, (double) f.get(model)));
+                } else {
+                    throw new UnsupportedOperationException();
+                }
+            } catch (IllegalAccessException e) {
+                throw new RuntimeException(e);
+            }
+        }
+
+        var updatesString = columns.stream().map(e -> "`" + e + "` = ?").collect(Collectors.joining(", "));
+        var whereString = entity.getEntity().getPrimaryKey().getFields().stream().map(e -> "`" + e.getName() + "` = ?").collect(Collectors.joining(" AND "));
+
+        //add values for where clause
+        for (DbField<?> field : entity.getEntity().getPrimaryKey().getFields()) {
+            Field f = field.getField();
+            f.setAccessible(true);
+            try {
+                if (f.get(model) == null) {
+                    valueBinders.add((stmt, i) -> stmt.setNull(i, Types.INTEGER));
+                } else if (field.getField().getType() == String.class) {
+                    valueBinders.add((stmt, i) -> stmt.setString(i, (String) f.get(model)));
+                } else if (field.getField().getType() == byte.class || field.getField().getType() == Byte.class) {
+                    valueBinders.add((stmt, i) -> stmt.setByte(i, (byte) f.get(model)));
+                } else if (field.getField().getType() == char.class || field.getField().getType() == Character.class) {
+//                    valueSetters.add((stmt, i) -> stmt.setString(i, (char) f.get(model)));//TODO handle char
+                    throw new UnsupportedOperationException("char");
+                } else if (field.getField().getType() == short.class || field.getField().getType() == Short.class) {
+                    valueBinders.add((stmt, i) -> stmt.setShort(i, (short) f.get(model)));
+                } else if (field.getField().getType() == int.class || field.getField().getType() == Integer.class) {
+                    valueBinders.add((stmt, i) -> stmt.setInt(i, (int) f.get(model)));
+                } else if (field.getField().getType() == long.class || field.getField().getType() == Long.class) {
+                    valueBinders.add((stmt, i) -> stmt.setLong(i, (long) f.get(model)));
+                } else if (field.getField().getType() == float.class || field.getField().getType() == Float.class) {
+                    valueBinders.add((stmt, i) -> stmt.setFloat(i, (float) f.get(model)));
+                } else if (field.getField().getType() == double.class || field.getField().getType() == Double.class) {
+                    valueBinders.add((stmt, i) -> stmt.setDouble(i, (double) f.get(model)));
+                } else {
+                    throw new UnsupportedOperationException();
+                }
+            } catch (IllegalAccessException e) {
+                throw new RuntimeException(e);
+            }
+        }
+
+        var query = "UPDATE `" + entity.name() + "` SET " + updatesString + " WHERE " + whereString;
+        System.out.println(query);
+        try (var stmt = connection.prepareStatement(query, Statement.RETURN_GENERATED_KEYS)) {
+            var i = 1;
+            for (Util.ThrowableBiConsumer<PreparedStatement, Integer> valueBinder : valueBinders) {
+                try {
+                    valueBinder.accept(stmt, i++);
+                } catch (Throwable e) {
+                    if (e instanceof SQLException) {
+                        throw (SQLException) e;
+                    }
+                    throw new IllegalStateException("This may not happen", e);
+                }
+            }
+            var updated = stmt.executeUpdate();
+            if (updated != 1) {
+                throw new SQLException("Failed to update entity");
+            }
+            try (var res = stmt.getGeneratedKeys()) {
+//                var primary = entity.getEntity().getPrimaryKey();
+//                if (primary != null) {
+//                    if (!res.next()) {
+//                        throw new SQLException("Failed to add entity");
+//                    }
+//                    var idField = primary.getFields().get(0);//TODO this only supports primary keys, and only with one column
+//                    idField.getField().setAccessible(true);
+//                    if (idField.getField().getType() == int.class || idField.getField().getType() == Integer.class) {//TODO support more types
+//                        idField.getField().set(model, res.getInt(1));
+//                    } else if (idField.getField().getType() == long.class || idField.getField().getType() == Long.class) {
+//                        idField.getField().set(model, res.getLong(1));
+//                    } else {
+//                        throw new UnsupportedOperationException();
+//                    }
+//                }
+//            } catch (IllegalAccessException e) {
+//                throw new RuntimeException(e);
+            }
+        }
+    }
+
+    @Override
+    public <T extends SerializableObject> void delete(DbContext context, Class<T> clazz, T model) throws SQLException {
+        var modelBuilder = ModelBuilder.from(context.getClass());
+        var entity = modelBuilder.entity(clazz);
+        if (entity.getEntity().getPrimaryKey() == null) {
+            throw new UnsupportedOperationException("Primary key required for updates");//at least for now
+        }
+
+        var valueBinders = new ArrayList<Util.ThrowableBiConsumer<PreparedStatement, Integer>>();
+        var whereString = entity.getEntity().getPrimaryKey().getFields().stream().map(e -> "`" + e.getName() + "` = ?").collect(Collectors.joining(" AND "));
+
+        //add values for where clause
+        for (DbField<?> field : entity.getEntity().getPrimaryKey().getFields()) {
+            Field f = field.getField();
+            f.setAccessible(true);
+            try {
+                if (f.get(model) == null) {
+                    valueBinders.add((stmt, i) -> stmt.setNull(i, Types.INTEGER));
+                } else if (field.getField().getType() == String.class) {
+                    valueBinders.add((stmt, i) -> stmt.setString(i, (String) f.get(model)));
+                } else if (field.getField().getType() == byte.class || field.getField().getType() == Byte.class) {
+                    valueBinders.add((stmt, i) -> stmt.setByte(i, (byte) f.get(model)));
+                } else if (field.getField().getType() == char.class || field.getField().getType() == Character.class) {
+//                    valueSetters.add((stmt, i) -> stmt.setString(i, (char) f.get(model)));//TODO handle char
+                    throw new UnsupportedOperationException("char");
+                } else if (field.getField().getType() == short.class || field.getField().getType() == Short.class) {
+                    valueBinders.add((stmt, i) -> stmt.setShort(i, (short) f.get(model)));
+                } else if (field.getField().getType() == int.class || field.getField().getType() == Integer.class) {
+                    valueBinders.add((stmt, i) -> stmt.setInt(i, (int) f.get(model)));
+                } else if (field.getField().getType() == long.class || field.getField().getType() == Long.class) {
+                    valueBinders.add((stmt, i) -> stmt.setLong(i, (long) f.get(model)));
+                } else if (field.getField().getType() == float.class || field.getField().getType() == Float.class) {
+                    valueBinders.add((stmt, i) -> stmt.setFloat(i, (float) f.get(model)));
+                } else if (field.getField().getType() == double.class || field.getField().getType() == Double.class) {
+                    valueBinders.add((stmt, i) -> stmt.setDouble(i, (double) f.get(model)));
+                } else {
+                    throw new UnsupportedOperationException();
+                }
+            } catch (IllegalAccessException e) {
+                throw new RuntimeException(e);
+            }
+        }
+
+        var query = "DELETE FROM `" + entity.name() + "` WHERE " + whereString;
+        System.out.println(query);
+        try (var stmt = connection.prepareStatement(query)) {
+            var i = 1;
+            for (Util.ThrowableBiConsumer<PreparedStatement, Integer> valueBinder : valueBinders) {
+                try {
+                    valueBinder.accept(stmt, i++);
+                } catch (Throwable e) {
+                    if (e instanceof SQLException) {
+                        throw (SQLException) e;
+                    }
+                    throw new IllegalStateException("This may not happen", e);
+                }
+            }
+            var deleted = stmt.executeUpdate();
+            if (deleted != 1) {
+                throw new SQLException("Failed to delete entity");
+            }
+        }
+    }
 }

mysql/src/main/java/jef/platform/mysql/dbinterface/ByteCodeHelper.java

@@ -0,0 +1,445 @@
+package jef.platform.mysql.dbinterface;
+
+import jef.asm.access.model.ClassDescription;
+import jef.asm.access.model.GetterDescription;
+import jef.asm.access.model.SetterDescription;
+import jef.model.DbField;
+import org.objectweb.asm.ClassVisitor;
+import org.objectweb.asm.Label;
+import org.objectweb.asm.MethodVisitor;
+import org.objectweb.asm.Opcodes;
+import org.objectweb.asm.Type;
+
+import java.lang.reflect.Field;
+import java.lang.reflect.Modifier;
+import java.sql.Connection;
+import java.sql.PreparedStatement;
+import java.sql.ResultSet;
+import java.sql.SQLException;
+import java.sql.Types;
+import java.util.Arrays;
+import java.util.Optional;
+import java.util.Set;
+import java.util.function.Consumer;
+import java.util.stream.Collectors;
+
+public abstract class ByteCodeHelper {
+    public final static Type T_BOOL = Type.getType(boolean.class);
+    public final static Type T_BYTE = Type.getType(byte.class);
+    public final static Type T_CHAR = Type.getType(char.class);
+    public final static Type T_CLASS = Type.getType(Class.class);
+    public final static Type T_CONNECTION = Type.getType(Connection.class);
+    public final static Type T_DOUBLE = Type.getType(double.class);
+    public final static Type T_FIELD = Type.getType(Field.class);
+    public final static Type T_FLOAT = Type.getType(float.class);
+    public final static Type T_INT = Type.getType(int.class);
+    public final static Type T_LONG = Type.getType(long.class);
+    public final static Type T_MYSQL_ENTITY_DB_INTERFACE = Type.getType(MysqlEntityDbInterface.class);
+    public final static Type T_OBJECT = Type.getType(Object.class);
+    public final static Type T_OVERRIDE = Type.getType(Override.class);
+    public final static Type T_PREPARED_STATEMENT = Type.getType(PreparedStatement.class);
+    public final static Type T_RESULT_SET = Type.getType(ResultSet.class);
+    public final static Type T_SHORT = Type.getType(short.class);
+    public final static Type T_SQLEXCEPTION = Type.getType(SQLException.class);
+    public final static Type T_STRING = Type.getType(String.class);
+    public final static Type T_VOID = Type.getType(void.class);
+
+    //region getter
+    private static void visitGetFieldDirectAccess(MethodVisitor mv, Field field, int varIndexEntity) {
+        mv.visitVarInsn(Opcodes.ALOAD, varIndexEntity);
+        mv.visitFieldInsn(Opcodes.GETFIELD, Type.getInternalName(field.getDeclaringClass()), field.getName(), Type.getInternalName(field.getType()));
+    }
+
+    private static void visitGetter(MethodVisitor mv, GetterDescription getter, int varIndexEntity) {
+        mv.visitVarInsn(Opcodes.ALOAD, varIndexEntity);
+        mv.visitMethodInsn(Opcodes.INVOKEVIRTUAL,
+                           getter.getMethodDeclaringClassName().replace(".", "/"),
+                           getter.getMethodName(),
+                           "(" + Arrays.stream(getter.getMethodParameterClassNames())
+                                   .map(ByteCodeHelper::getDescriptorForClassName)
+                                   .collect(Collectors.joining())
+                                   + ")" + getDescriptorForClassName(getter.getMethodReturnClassName()),
+                           false);
+    }
+
+    private static void visitGetViaReflection(MethodVisitor mv, Field field, int varIndexEntity, String className, Runnable defineFieldCallback) {
+        defineFieldCallback.run();
+
+        // field.get*(entity, value);
+        mv.visitFieldInsn(Opcodes.GETSTATIC, className.replace(".", "/"), makeReflectedFieldName(field), Type.getDescriptor(field.getType()));
+        mv.visitVarInsn(Opcodes.ALOAD, varIndexEntity);
+        var clazz = field.getType();
+        if (clazz == boolean.class) {
+            mv.visitMethodInsn(Opcodes.INVOKEVIRTUAL, T_FIELD.getInternalName(), "getBoolean", Type.getMethodDescriptor(T_BOOL, T_OBJECT), false);
+        } else if (clazz == byte.class) {
+            mv.visitMethodInsn(Opcodes.INVOKEVIRTUAL, T_FIELD.getInternalName(), "getByte", Type.getMethodDescriptor(T_BYTE, T_OBJECT), false);
+        } else if (clazz == char.class) {
+            mv.visitMethodInsn(Opcodes.INVOKEVIRTUAL, T_FIELD.getInternalName(), "getCharacter", Type.getMethodDescriptor(T_CHAR, T_OBJECT), false);
+        } else if (clazz == short.class) {
+            mv.visitMethodInsn(Opcodes.INVOKEVIRTUAL, T_FIELD.getInternalName(), "getShort", Type.getMethodDescriptor(T_SHORT, T_OBJECT), false);
+        } else if (clazz == int.class) {
+            mv.visitMethodInsn(Opcodes.INVOKEVIRTUAL, T_FIELD.getInternalName(), "getInt", Type.getMethodDescriptor(T_INT, T_OBJECT), false);
+        } else if (clazz == long.class) {
+            mv.visitMethodInsn(Opcodes.INVOKEVIRTUAL, T_FIELD.getInternalName(), "getLong", Type.getMethodDescriptor(T_LONG, T_OBJECT), false);
+        } else if (clazz == float.class) {
+            mv.visitMethodInsn(Opcodes.INVOKEVIRTUAL, T_FIELD.getInternalName(), "getFloat", Type.getMethodDescriptor(T_FLOAT, T_OBJECT), false);
+        } else if (clazz == double.class) {
+            mv.visitMethodInsn(Opcodes.INVOKEVIRTUAL, T_FIELD.getInternalName(), "getDouble", Type.getMethodDescriptor(T_DOUBLE, T_OBJECT), false);
+        } else {
+            mv.visitMethodInsn(Opcodes.INVOKEVIRTUAL, T_FIELD.getInternalName(), "get", Type.getMethodDescriptor(T_OBJECT, T_OBJECT), false);
+        }
+    }
+
+    static void visitGetField(MethodVisitor mv, Field field, int varIndexEntity, String className, Runnable defineFieldCallback, ClassDescription classDescription) {
+        //try direct member access
+        if (Modifier.isPublic(field.getModifiers())) {//TODO better check if publicly accessible
+            visitGetFieldDirectAccess(mv, field, varIndexEntity);
+            return;
+        }
+
+        //try finding getter
+        Optional<GetterDescription> getter = classDescription.getDeclaredGetters().stream()
+                .filter(e -> e.getFieldDeclaringClassName().equals(field.getDeclaringClass().getName())
+                        && e.getFieldName().equals(field.getName()))
+                .findFirst();
+        if (getter.isPresent()) {
+            visitGetter(mv, getter.get(), varIndexEntity);
+            return;
+        }
+
+        //use reflection
+        visitGetViaReflection(mv, field, varIndexEntity, className, defineFieldCallback);
+    }
+    //endregion
+
+    //region setter
+    private static void visitSetFieldDirectAccess(MethodVisitor mv, Field field, Consumer<MethodVisitor> value, int varIndexEntity) {
+        mv.visitVarInsn(Opcodes.ALOAD, varIndexEntity);
+        value.accept(mv);
+        mv.visitFieldInsn(Opcodes.PUTFIELD, Type.getInternalName(field.getDeclaringClass()), field.getName(), Type.getInternalName(field.getType()));
+    }
+
+    private static void visitSetter(MethodVisitor mv, SetterDescription setter, Consumer<MethodVisitor> value, int varIndexEntity) {
+        mv.visitVarInsn(Opcodes.ALOAD, varIndexEntity);
+        value.accept(mv);
+        mv.visitMethodInsn(Opcodes.INVOKEVIRTUAL,
+                           setter.getMethodDeclaringClassName().replace(".", "/"),
+                           setter.getMethodName(),
+                           "(" + Arrays.stream(setter.getMethodParameterClassNames())
+                                   .map(ByteCodeHelper::getDescriptorForClassName)
+                                   .collect(Collectors.joining())
+                                   + ")" + getDescriptorForClassName(setter.getMethodReturnClassName()),
+                           false);
+    }
+
+    private static void visitSetViaReflection(MethodVisitor mv, Field field, Consumer<MethodVisitor> value, int varIndexEntity, String className, Runnable defineFieldCallback) {
+        defineFieldCallback.run();
+
+        // field.set*(entity, value);
+        mv.visitFieldInsn(Opcodes.GETSTATIC, className.replace(".", "/"), makeReflectedFieldName(field), Type.getDescriptor(field.getType()));
+        mv.visitVarInsn(Opcodes.ALOAD, varIndexEntity);
+        value.accept(mv);
+        var clazz = field.getType();
+        if (clazz == boolean.class) {
+            mv.visitMethodInsn(Opcodes.INVOKEVIRTUAL, T_FIELD.getInternalName(), "setBoolean", Type.getMethodDescriptor(T_VOID, T_OBJECT, T_BOOL), false);
+        } else if (clazz == byte.class) {
+            mv.visitMethodInsn(Opcodes.INVOKEVIRTUAL, T_FIELD.getInternalName(), "setByte", Type.getMethodDescriptor(T_VOID, T_OBJECT, T_BYTE), true);
+        } else if (clazz == char.class) {
+            mv.visitMethodInsn(Opcodes.INVOKEVIRTUAL, T_FIELD.getInternalName(), "setCharacter", Type.getMethodDescriptor(T_VOID, T_OBJECT, T_CHAR), true);
+        } else if (clazz == short.class) {
+            mv.visitMethodInsn(Opcodes.INVOKEVIRTUAL, T_FIELD.getInternalName(), "setShort", Type.getMethodDescriptor(T_VOID, T_OBJECT, T_SHORT), true);
+        } else if (clazz == int.class) {
+            mv.visitMethodInsn(Opcodes.INVOKEVIRTUAL, T_FIELD.getInternalName(), "setInt", Type.getMethodDescriptor(T_VOID, T_OBJECT, T_INT), true);
+        } else if (clazz == long.class) {
+            mv.visitMethodInsn(Opcodes.INVOKEVIRTUAL, T_FIELD.getInternalName(), "setLong", Type.getMethodDescriptor(T_VOID, T_OBJECT, T_LONG), true);
+        } else if (clazz == float.class) {
+            mv.visitMethodInsn(Opcodes.INVOKEVIRTUAL, T_FIELD.getInternalName(), "setFloat", Type.getMethodDescriptor(T_VOID, T_OBJECT, T_FLOAT), true);
+        } else if (clazz == double.class) {
+            mv.visitMethodInsn(Opcodes.INVOKEVIRTUAL, T_FIELD.getInternalName(), "setDouble", Type.getMethodDescriptor(T_VOID, T_OBJECT, T_DOUBLE), true);
+        } else {
+            mv.visitMethodInsn(Opcodes.INVOKEVIRTUAL, T_FIELD.getInternalName(), "set", Type.getMethodDescriptor(T_VOID, T_OBJECT, T_OBJECT), true);
+        }
+    }
+
+    static void visitSetField(MethodVisitor mv, Field field, Consumer<MethodVisitor> value, int varIndexEntity, String className, Runnable defineFieldCallback, ClassDescription classDescription) {
+        //try direct member access
+        if (Modifier.isPublic(field.getModifiers()) && !Modifier.isFinal(field.getModifiers())) {//TODO better check if publicly accessible
+            visitSetFieldDirectAccess(mv, field, value, varIndexEntity);
+            return;
+        }
+
+        //try finding getter
+        Optional<SetterDescription> setter = classDescription.getDeclaredSetters().stream()
+                .filter(e -> e.getFieldDeclaringClassName().equals(field.getDeclaringClass().getName())
+                        && e.getFieldName().equals(field.getName()))
+                .findFirst();
+        if (setter.isPresent()) {
+            visitSetter(mv, setter.get(), value, varIndexEntity);
+            return;
+        }
+
+        //use reflection
+        visitSetViaReflection(mv, field, value, varIndexEntity, className, defineFieldCallback);
+    }
+    //endregion
+
+    //region PrepareStatement
+    static void visitPreparedStatementSetNull(MethodVisitor mv, DbField<?> field, int varIndexStmt, int index) {
+        //stmt.setNull(i, Types.*);
+        mv.visitVarInsn(Opcodes.ALOAD, varIndexStmt);//push stmt
+        visitIntInsn(mv, index);//push index
+        var clazz = field.getType();
+        if (clazz == String.class) {
+            visitIntInsn(mv, Types.VARCHAR);//push Types.VARCHAR
+        } else if (clazz == boolean.class || clazz == Boolean.class) {
+            visitIntInsn(mv, Types.BIT);//push Types.BIT
+        } else if (clazz == byte.class || clazz == Byte.class) {
+            visitIntInsn(mv, Types.TINYINT);//push Types.TINYINT
+        } else if (clazz == char.class || clazz == Character.class) {
+            visitIntInsn(mv, Types.CHAR);//push Types.CHAR
+        } else if (clazz == short.class || clazz == Short.class) {
+            visitIntInsn(mv, Types.SMALLINT);//push Types.SMALLINT
+        } else if (clazz == int.class || clazz == Integer.class) {
+            visitIntInsn(mv, Types.INTEGER);//push Types.INTEGER
+        } else if (clazz == long.class || clazz == Long.class) {
+            visitIntInsn(mv, Types.BIGINT);//push Types.BIGINT
+        } else if (clazz == float.class || clazz == Float.class) {
+            visitIntInsn(mv, Types.FLOAT);//push Types.FLOAT
+        } else if (clazz == double.class || clazz == Double.class) {
+            visitIntInsn(mv, Types.DOUBLE);//push Types.DOUBLE
+        } else {
+            throw new UnsupportedOperationException(clazz.getName());
+        }
+        mv.visitMethodInsn(Opcodes.INVOKEVIRTUAL, T_PREPARED_STATEMENT.getInternalName(), "setNull", "(II)V", false);
+    }
+
+    static void visitPreparedStatementSetAny(MethodVisitor mv, DbField<?> field, int varIndexStmt, int index, Consumer<MethodVisitor> value) {
+        var clazz = field.getType();
+        //stmt.set*(i, value);
+        mv.visitVarInsn(Opcodes.ALOAD, varIndexStmt);//push stmt
+        visitIntInsn(mv, index);//push index
+        value.accept(mv);
+        if (clazz == String.class) {
+            mv.visitMethodInsn(Opcodes.INVOKEINTERFACE, T_PREPARED_STATEMENT.getInternalName(), "setString", "(ILjava.lang.String;)V", true);
+        } else if (clazz == boolean.class || clazz == Boolean.class) {
+            if (clazz == Boolean.class) {//unbox
+                mv.visitMethodInsn(Opcodes.INVOKEVIRTUAL, T_BOOL.getInternalName(), "booleanValue", "()Z", true);
+            }
+            mv.visitMethodInsn(Opcodes.INVOKEINTERFACE, T_PREPARED_STATEMENT.getInternalName(), "setBoolean", "(IZ)V", true);
+        } else if (clazz == byte.class || clazz == Byte.class) {
+            if (clazz == Byte.class) {//unbox
+                mv.visitMethodInsn(Opcodes.INVOKEVIRTUAL, T_BYTE.getInternalName(), "byteValue", "()B", true);
+            }
+            mv.visitMethodInsn(Opcodes.INVOKEINTERFACE, T_PREPARED_STATEMENT.getInternalName(), "setByte", "(IB)V", true);
+        } else if (clazz == char.class || clazz == Character.class) {
+//            if (clazz == Character.class) {//unbox
+//                mv.visitMethodInsn(Opcodes.INVOKEVIRTUAL, T_CHAR.getInternalName(), "charValue", "()C", true);
+//            }
+//            mv.visitMethodInsn(Opcodes.INVOKEINTERFACE, T_PREPARED_STATEMENT.getInternalName(), "setCharacter", "(IC)V", true);
+            throw new UnsupportedOperationException("char");
+        } else if (clazz == short.class || clazz == Short.class) {
+            if (clazz == Short.class) {//unbox
+                mv.visitMethodInsn(Opcodes.INVOKEVIRTUAL, T_SHORT.getInternalName(), "shortValue", "()S", true);
+            }
+            mv.visitMethodInsn(Opcodes.INVOKEINTERFACE, T_PREPARED_STATEMENT.getInternalName(), "setShort", "(IS)V", true);
+        } else if (clazz == int.class || clazz == Integer.class) {
+            if (clazz == Integer.class) {//unbox
+                mv.visitMethodInsn(Opcodes.INVOKEVIRTUAL, T_INT.getInternalName(), "intValue", "()I", true);
+            }
+            mv.visitMethodInsn(Opcodes.INVOKEINTERFACE, T_PREPARED_STATEMENT.getInternalName(), "setInt", "(II)V", true);
+        } else if (clazz == long.class || clazz == Long.class) {
+            if (clazz == Long.class) {//unbox
+                mv.visitMethodInsn(Opcodes.INVOKEVIRTUAL, T_LONG.getInternalName(), "longValue", "()J", true);
+            }
+            mv.visitMethodInsn(Opcodes.INVOKEINTERFACE, T_PREPARED_STATEMENT.getInternalName(), "setLong", "(IJ)V", true);
+        } else if (clazz == float.class || clazz == Float.class) {
+            if (clazz == Float.class) {//unbox
+                mv.visitMethodInsn(Opcodes.INVOKEVIRTUAL, T_FLOAT.getInternalName(), "floatValue", "()F", true);
+            }
+            mv.visitMethodInsn(Opcodes.INVOKEINTERFACE, T_PREPARED_STATEMENT.getInternalName(), "setFloat", "(IF)V", true);
+        } else if (clazz == double.class || clazz == Double.class) {
+            if (clazz == Double.class) {//unbox
+                mv.visitMethodInsn(Opcodes.INVOKEVIRTUAL, T_DOUBLE.getInternalName(), "doubleValue", "()D", true);
+            }
+            mv.visitMethodInsn(Opcodes.INVOKEINTERFACE, T_PREPARED_STATEMENT.getInternalName(), "setDouble", "(ID)V", true);
+        } else {
+            throw new UnsupportedOperationException(clazz.getName());
+        }
+    }
+    //endregion
+
+    //region ResultSet
+    static void visitResultSetGetAny(MethodVisitor mv, DbField<?> field, int varIndexRes) {
+        var clazz = field.getType();
+        // res.get*(fieldname);
+        mv.visitVarInsn(Opcodes.ALOAD, varIndexRes);//push res
+        mv.visitLdcInsn(field.getName());//push 1
+        if (clazz == String.class) {
+            mv.visitMethodInsn(Opcodes.INVOKEINTERFACE, T_RESULT_SET.getInternalName(), "getString", "(Ljava.lang.String;)Ljava.lang.String;", true);
+        } else if (clazz == boolean.class || clazz == Boolean.class) {
+            mv.visitMethodInsn(Opcodes.INVOKEINTERFACE, T_RESULT_SET.getInternalName(), "getBoolean", "(Ljava.lang.String;)Z", true);
+            if (clazz == Boolean.class) {//box
+                mv.visitMethodInsn(Opcodes.INVOKESPECIAL, T_BOOL.getInternalName(), "<init>", "(Z)V", true);
+            }
+        } else if (clazz == byte.class || clazz == Byte.class) {
+            mv.visitMethodInsn(Opcodes.INVOKEINTERFACE, T_RESULT_SET.getInternalName(), "getByte", "(Ljava.lang.String;)B", true);
+            if (clazz == Byte.class) {//box
+                mv.visitMethodInsn(Opcodes.INVOKESPECIAL, T_BYTE.getInternalName(), "<init>", "(B)V", true);
+            }
+        } else if (clazz == char.class || clazz == Character.class) {
+//            mv.visitMethodInsn(Opcodes.INVOKEINTERFACE, T_RESULT_SET.getInternalName(), "getCharacter", "(Ljava.lang.String;)C", true);
+//            if (clazz == Character.class) {//unbox
+//                mv.visitMethodInsn(Opcodes.INVOKESPECIAL, T_CHAR.getInternalName(), "<init>", "(C)Ljava.lang.Character;", true);
+//            }
+            throw new UnsupportedOperationException("char");
+        } else if (clazz == short.class || clazz == Short.class) {
+            mv.visitMethodInsn(Opcodes.INVOKEINTERFACE, T_RESULT_SET.getInternalName(), "getShort", "(Ljava.lang.String;)S", true);
+            if (clazz == Short.class) {//box
+                mv.visitMethodInsn(Opcodes.INVOKESPECIAL, T_SHORT.getInternalName(), "<init>", "(S)V", true);
+            }
+        } else if (clazz == int.class || clazz == Integer.class) {
+            mv.visitMethodInsn(Opcodes.INVOKEINTERFACE, T_RESULT_SET.getInternalName(), "getInt", "(Ljava.lang.String;)I", true);
+            if (clazz == Integer.class) {//box
+                mv.visitMethodInsn(Opcodes.INVOKESPECIAL, T_INT.getInternalName(), "<init>", "(I)V", true);
+            }
+        } else if (clazz == long.class || clazz == Long.class) {
+            mv.visitMethodInsn(Opcodes.INVOKEINTERFACE, T_RESULT_SET.getInternalName(), "getLong", "(Ljava.lang.String;)J", true);
+            if (clazz == Long.class) {//box
+                mv.visitMethodInsn(Opcodes.INVOKESPECIAL, T_LONG.getInternalName(), "<init>", "(J)V", true);
+            }
+        } else if (clazz == float.class || clazz == Float.class) {
+            mv.visitMethodInsn(Opcodes.INVOKEINTERFACE, T_RESULT_SET.getInternalName(), "getFloat", "(Ljava.lang.String;)F", true);
+            if (clazz == Float.class) {//box
+                mv.visitMethodInsn(Opcodes.INVOKESPECIAL, T_FLOAT.getInternalName(), "<init>", "(F)V", true);
+            }
+        } else if (clazz == double.class || clazz == Double.class) {
+            mv.visitMethodInsn(Opcodes.INVOKEINTERFACE, T_RESULT_SET.getInternalName(), "getDouble", "(Ljava.lang.String;)D", true);
+            if (clazz == Double.class) {//box
+                mv.visitMethodInsn(Opcodes.INVOKESPECIAL, T_DOUBLE.getInternalName(), "<init>", "(D)V", true);
+            }
+        } else {
+            throw new UnsupportedOperationException(clazz.getName());
+        }
+
+        // if (res.wasNull()) {
+        //     POP
+        //     PUSH NULL
+        // }
+        if (!clazz.isPrimitive()) {
+            var labelWasNotNull = new Label();
+            mv.visitVarInsn(Opcodes.ALOAD, varIndexRes);//push res
+            mv.visitMethodInsn(Opcodes.INVOKEINTERFACE, T_RESULT_SET.getInternalName(), "wasNull", "()Z", true);
+            mv.visitJumpInsn(Opcodes.IFEQ, labelWasNotNull);
+            mv.visitInsn(Opcodes.POP);//POP
+            mv.visitInsn(Opcodes.ACONST_NULL);//PUSH NULL
+            mv.visitLabel(labelWasNotNull);
+        }
+    }
+    //endregion
+
+    //region util
+    static void visitIntInsn(MethodVisitor mv, int value) {
+        switch (value) {
+            case -1 -> mv.visitInsn(Opcodes.ICONST_M1);
+            case 0 -> mv.visitInsn(Opcodes.ICONST_0);
+            case 1 -> mv.visitInsn(Opcodes.ICONST_1);
+            case 2 -> mv.visitInsn(Opcodes.ICONST_2);
+            case 3 -> mv.visitInsn(Opcodes.ICONST_3);
+            case 4 -> mv.visitInsn(Opcodes.ICONST_4);
+            case 5 -> mv.visitInsn(Opcodes.ICONST_5);
+            default -> {
+                if (Byte.MIN_VALUE <= value && value <= Byte.MAX_VALUE) {
+                    mv.visitIntInsn(Opcodes.BIPUSH, value);
+                } else if (Short.MIN_VALUE <= value && value <= Short.MAX_VALUE) {
+                    mv.visitIntInsn(Opcodes.SIPUSH, value);
+                } else {
+                    mv.visitLdcInsn(value);
+                }
+            }
+        }
+    }
+
+    static void visitThrowSQLException(MethodVisitor mv, String message) {
+        mv.visitTypeInsn(Opcodes.NEW, T_SQLEXCEPTION.getInternalName());
+        mv.visitInsn(Opcodes.DUP);
+        mv.visitLdcInsn(message);
+        mv.visitMethodInsn(Opcodes.INVOKESPECIAL, T_SQLEXCEPTION.getInternalName(), "<init>", Type.getMethodDescriptor(T_VOID, T_STRING), false);
+        mv.visitInsn(Opcodes.ATHROW);
+    }
+
+    public static void visitPushDefault(MethodVisitor mv, Class<?> type) {
+        if (Set.of(void.class, boolean.class, byte.class, char.class, short.class, int.class, float.class).contains(type)) {
+            mv.visitInsn(Opcodes.ICONST_0);
+        } else if (Set.of(double.class, long.class).contains(type)) {
+            mv.visitInsn(Opcodes.ICONST_0);
+            mv.visitInsn(Opcodes.ICONST_0);
+        } else {
+            mv.visitInsn(Opcodes.ACONST_NULL);
+        }
+    }
+
+    static String getDescriptorForClassName(String className) {
+        return switch (className) {
+            case "void" -> "V";
+            case "boolean" -> "Z";
+            case "byte" -> "B";
+            case "char" -> "C";
+            case "short" -> "S";
+            case "int" -> "I";
+            case "long" -> "J";
+            case "float" -> "F";
+            case "double" -> "D";
+            default -> "L" + className.replace(".", "/") + ";";
+        };
+    }
+    //endregion
+
+    //region field reflection
+    public static void visitReflectedFieldDefinition(ClassVisitor visitor, Field field, boolean synthetic) {
+        visitor.visitField(Opcodes.ACC_PRIVATE | Opcodes.ACC_STATIC | (synthetic ? Opcodes.ACC_SYNTHETIC : 0),
+                           makeReflectedFieldName(field), T_FIELD.getDescriptor(), null, null);
+    }
+
+    public static void visitReflectedFieldInit(MethodVisitor mv, Field field, String className) {
+        className = className.replace(".", "/");
+        var fieldname = makeReflectedFieldName(field);
+
+        // field = EntityClass.class.getDeclaredField("fieldname");
+        mv.visitLdcInsn(Type.getObjectType(field.getDeclaringClass().getName()));
+        mv.visitLdcInsn(field.getName());
+        mv.visitMethodInsn(Opcodes.INVOKEVIRTUAL, T_CLASS.getInternalName(), "getDeclaredField", Type.getMethodDescriptor(T_FIELD, T_STRING), false);
+        mv.visitFieldInsn(Opcodes.PUTSTATIC, className, fieldname, T_FIELD.getDescriptor());
+
+        // field.setAccessible(true);
+        mv.visitFieldInsn(Opcodes.GETSTATIC, className, fieldname, Type.getDescriptor(field.getType()));
+        mv.visitInsn(Opcodes.ICONST_1);
+        mv.visitMethodInsn(Opcodes.INVOKEVIRTUAL, T_FIELD.getInternalName(), "setAccessible", Type.getMethodDescriptor(T_VOID, T_BOOL), false);
+    }
+
+    private static String makeReflectedFieldName(Field field) {
+        return field.getDeclaringClass().getName().replace(".", "_") + "_" + field.getName();
+    }
+    //endregion
+
+    //region var access
+    //    private void visitLoadVariable(MethodVisitor mv, String className, int varIndex) {
+//        switch (className) {
+//            case "boolean", "byte", "char", "short", "int" -> mv.visitVarInsn(Opcodes.ILOAD, varIndex);
+//            case "long" -> mv.visitVarInsn(Opcodes.LLOAD, varIndex);
+//            case "float" -> mv.visitVarInsn(Opcodes.FLOAD, varIndex);
+//            case "double" -> mv.visitVarInsn(Opcodes.DLOAD, varIndex);
+//            default -> mv.visitVarInsn(Opcodes.ALOAD, varIndex);
+//        }
+//    }
+//
+//    private void visitStoreVariable(MethodVisitor mv, String className, int varIndex) {
+//        switch (className) {
+//            case "boolean", "byte", "char", "short", "int" -> mv.visitVarInsn(Opcodes.ISTORE, varIndex);
+//            case "long" -> mv.visitVarInsn(Opcodes.LSTORE, varIndex);
+//            case "float" -> mv.visitVarInsn(Opcodes.FSTORE, varIndex);
+//            case "double" -> mv.visitVarInsn(Opcodes.DSTORE, varIndex);
+//            default -> mv.visitVarInsn(Opcodes.ASTORE, varIndex);
+//        }
+//    }
+    //endregion
+}

mysql/src/main/java/jef/platform/mysql/dbinterface/MysqlEntityDbInterface.java

@@ -0,0 +1,76 @@
+package jef.platform.mysql.dbinterface;
+
+import jef.serializable.SerializableObject;
+
+import javax.xml.transform.Result;
+import java.sql.Connection;
+import java.sql.PreparedStatement;
+import java.sql.ResultSet;
+import java.sql.SQLException;
+import java.sql.Types;
+
+public abstract class MysqlEntityDbInterface<T extends SerializableObject> {
+    public void add(Connection connection, T entity) throws SQLException {
+        try (var stmt = queryAdd(connection)) {
+            bindParamsAdd(stmt, entity);
+
+            var added = stmt.executeUpdate();
+            if (added != 1) {
+                throw new SQLException("Failed to insert entity");
+            }
+
+            readBackGeneratedValuesAdd(stmt, entity);
+        }
+    }
+
+    protected abstract PreparedStatement queryAdd(Connection connection) throws SQLException;
+
+    protected abstract void bindParamsAdd(PreparedStatement stmt, T entity) throws SQLException;
+
+    protected void readBackGeneratedValuesAdd(PreparedStatement stmt, T entity) throws SQLException {
+        try (var res = stmt.getGeneratedKeys()) {
+            readBackGeneratedValuesAdd(res, entity);
+        }
+    }
+
+    protected abstract void readBackGeneratedValuesAdd(ResultSet res, T entity) throws SQLException;
+
+    public void update(Connection connection, T entity) throws SQLException {
+        try (var stmt = queryUpdate(connection)) {
+            bindParamsUpdate(stmt, entity);
+
+            var updated = stmt.executeUpdate();
+            if (updated != 1) {
+                throw new SQLException("Failed to update entity");
+            }
+
+            readBackGeneratedValuesUpdate(stmt, entity);
+        }
+    }
+
+    protected abstract PreparedStatement queryUpdate(Connection connection) throws SQLException;
+
+    protected abstract void bindParamsUpdate(PreparedStatement stmt, T entity) throws SQLException;
+
+    protected void readBackGeneratedValuesUpdate(PreparedStatement stmt, T entity) throws SQLException {
+        try (var res = stmt.getGeneratedKeys()) {
+            readBackGeneratedValuesUpdate(res, entity);
+        }
+    }
+
+    protected abstract void readBackGeneratedValuesUpdate(ResultSet res, T entity) throws SQLException;
+
+    public void delete(Connection connection, T entity) throws SQLException {
+        try (var stmt = queryUpdate(connection)) {
+            bindParamsDelete(stmt, entity);
+
+            var deleted = stmt.executeUpdate();
+            if (deleted != 1) {
+                throw new SQLException("Failed to delete entity");
+            }
+        }
+    }
+    protected abstract void bindParamsDelete(PreparedStatement stmt, T entity) throws SQLException;
+
+    public abstract T read(ResultSet res);
+}

mysql/src/main/java/jef/platform/mysql/dbinterface/MysqlEntityDbInterfaceGenerator.java

@@ -0,0 +1,791 @@
+package jef.platform.mysql.dbinterface;
+
+import jef.asm.access.ClassAnalyzer;
+import jef.asm.access.model.ClassDescription;
+import jef.model.DbContext;
+import jef.model.DbEntity;
+import jef.model.DbField;
+import jef.model.annotations.Generated;
+import jef.serializable.SerializableObject;
+import lombok.AllArgsConstructor;
+import lombok.Getter;
+import org.objectweb.asm.ClassVisitor;
+import org.objectweb.asm.ClassWriter;
+import org.objectweb.asm.Label;
+import org.objectweb.asm.MethodVisitor;
+import org.objectweb.asm.Opcodes;
+import org.objectweb.asm.Type;
+
+import java.lang.reflect.Field;
+import java.sql.Statement;
+import java.util.AbstractMap;
+import java.util.ArrayList;
+import java.util.Comparator;
+import java.util.HashSet;
+import java.util.List;
+import java.util.Set;
+import java.util.function.Consumer;
+import java.util.stream.Collectors;
+
+public class MysqlEntityDbInterfaceGenerator<T extends SerializableObject> {
+    private static final boolean SET_SYNTHETIC_FLAG = false;
+    private static final int SYNTHETIC_FLAG = SET_SYNTHETIC_FLAG ? Opcodes.ACC_SYNTHETIC : 0;
+
+    private final Class<? extends DbContext> context;
+    private final DbEntity<T> entity;
+
+    private final ClassWriter writer;
+    private final ClassVisitor visitor;
+
+    //runtime
+    private ClassDescription classDescription;
+    private final Set<Field> fieldsToReflect = new HashSet<>();
+
+    //results
+    @Getter
+    private String className;
+    @Getter
+    private byte[] byteCode;
+
+    public MysqlEntityDbInterfaceGenerator(Class<? extends DbContext> context, DbEntity<T> entity) {
+        this.context = context;
+        this.entity = entity;
+        writer = new ClassWriter(Opcodes.ASM9);
+        visitor = new ClassVisitor(Opcodes.ASM9, writer) {
+        };
+    }
+
+    public void generate() {
+        classDescription = new ClassAnalyzer().analyze(entity.getType());
+
+        //follows template "<context full class name>$<entity classname>MysqlEntityDbInterface"
+//        className = context.getName() + "$" + entity.getType().getSimpleName() + "" + MysqlEntityDbInterface.class.getSimpleName();
+        className = entity.getType().getSimpleName() + "" + MysqlEntityDbInterface.class.getSimpleName();
+
+        defineClass();
+
+        //add
+        defineQueryAddFunction();
+        defineBindParamsAddFunction();
+        defineReadBackGeneratedValuesAddPreparedStatement();
+        defineReadBackGeneratedValuesAddResultSet();
+
+        //update
+        defineQueryUpdateFunction();
+        defineBindParamsUpdateFunction();
+        defineReadBackGeneratedValuesUpdatePreparedStatement();
+        defineReadBackGeneratedValuesUpdateResultSet();
+
+        //delete
+        defineQueryDeleteFunction();
+        defineBindParamsDeleteFunction();
+
+        //read
+        defineReadFunction();
+
+        //other
+        defineReflectedFields();
+        defineClassConstructor();
+        defineConstructor();
+
+        visitor.visitEnd();
+
+        byteCode = writer.toByteArray();
+    }
+
+    protected void defineClass() {
+        var classSimpleName = className.substring(Math.max(className.lastIndexOf("."), className.lastIndexOf("$")) + 1);
+        visitor.visit(Opcodes.V17, Opcodes.ACC_PUBLIC | Opcodes.ACC_SUPER | SYNTHETIC_FLAG, classSimpleName, Type.getDescriptor(MysqlEntityDbInterface.class).replace(";", "<" + ByteCodeHelper.getDescriptorForClassName(entity.getTypeName()) + ">;"), Type.getInternalName(MysqlEntityDbInterface.class), new String[]{});
+//        visitor.visitNestHost(Type.getInternalName(context));
+//        visitor.visitInnerClass(className.replace(".", "/"), Type.getInternalName(context), classSimpleName, Opcodes.ACC_PUBLIC | Opcodes.ACC_STATIC | Opcodes.ACC_SUPER);
+    }
+
+    //public <init>() {}
+    private void defineConstructor() {
+        var mv = visitor.visitMethod(Opcodes.ACC_PUBLIC | SYNTHETIC_FLAG, "<init>", "()V", null, new String[0]);
+        mv.visitCode();
+        mv.visitVarInsn(Opcodes.ALOAD, 0);
+        mv.visitMethodInsn(Opcodes.INVOKESPECIAL, ByteCodeHelper.T_MYSQL_ENTITY_DB_INTERFACE.getInternalName(), "<init>", "()V", false);
+        mv.visitInsn(Opcodes.RETURN);
+        mv.visitMaxs(1, 1);
+        mv.visitEnd();
+    }
+
+    private void defineReflectedFields() {
+        for (Field field : fieldsToReflect) {
+            ByteCodeHelper.visitReflectedFieldDefinition(visitor, field, SET_SYNTHETIC_FLAG);
+        }
+    }
+
+    //<clinit>
+    private void defineClassConstructor() {
+        var mv = visitor.visitMethod(Opcodes.ACC_STATIC | SYNTHETIC_FLAG, "<clinit>", "()V", null, new String[0]);
+        mv.visitCode();
+
+        //init reflected fields
+        for (Field field : fieldsToReflect) {
+            ByteCodeHelper.visitReflectedFieldInit(mv, field, className);
+        }
+
+        mv.visitInsn(Opcodes.RETURN);
+        mv.visitMaxs(2, 0);
+        mv.visitEnd();
+    }
+
+    //region add
+    private void defineQueryAddFunction() {
+        var mv = visitor.visitMethod(Opcodes.ACC_PROTECTED | SYNTHETIC_FLAG, "queryAdd", Type.getMethodDescriptor(ByteCodeHelper.T_PREPARED_STATEMENT, ByteCodeHelper.T_CONNECTION), null, new String[]{ByteCodeHelper.T_SQLEXCEPTION.getInternalName()});
+        mv.visitAnnotation(ByteCodeHelper.T_OVERRIDE.getDescriptor(), true).visitEnd();
+
+        var varIndexThis = 0;
+        var varIndexConnection = 1;
+
+        var columnsAndValueBindersSet = prepareColumnsAndValueBindersSet();
+
+        var columnsString = columnsAndValueBindersSet.getColumns().stream().map(e -> "`" + e + "`").collect(Collectors.joining(","));
+        var placeholdersString = columnsAndValueBindersSet.getColumns().stream().map(e -> "?").collect(Collectors.joining(","));
+        var query = "INSERT INTO `" + entity.getName() + "` (" + columnsString + ") VALUES (" + placeholdersString + ")";
+
+        // variable scopes
+        var labelStartThis = new Label();
+        var labelEndThis = new Label();
+        var labelStartConnection = new Label();
+        var labelEndConnection = new Label();
+
+        // begin
+        mv.visitCode();
+
+        // variable scopes
+        mv.visitLabel(labelStartThis);
+        mv.visitLabel(labelStartConnection);
+
+        //return connection.prepareStatement("query", Statement.RETURN_GENERATED_KEYS);
+        mv.visitVarInsn(Opcodes.ALOAD, 1);
+        mv.visitLdcInsn(query);
+        if (entity.getFields().stream().anyMatch(e -> e.getGenerated() != Generated.Type.NONE)) {
+            ByteCodeHelper.visitIntInsn(mv, Statement.RETURN_GENERATED_KEYS);
+        } else {
+            mv.visitInsn(Opcodes.ICONST_0); //no flags
+        }
+        mv.visitMethodInsn(Opcodes.INVOKEINTERFACE, ByteCodeHelper.T_CONNECTION.getInternalName(), "prepareStatement", Type.getMethodDescriptor(ByteCodeHelper.T_PREPARED_STATEMENT, ByteCodeHelper.T_STRING, ByteCodeHelper.T_INT), true);
+        mv.visitInsn(Opcodes.ARETURN);
+
+        // variable scopes
+        mv.visitLabel(labelEndConnection);
+        mv.visitLabel(labelEndThis);
+
+        // debug symbols
+        mv.visitLocalVariable("this", ByteCodeHelper.getDescriptorForClassName(className), null, labelStartConnection, labelEndConnection, varIndexThis);
+        mv.visitLocalVariable("connection", ByteCodeHelper.T_CONNECTION.getDescriptor(), null, labelStartThis, labelEndThis, varIndexConnection);
+
+        mv.visitMaxs(3, 2);
+
+        mv.visitEnd();
+    }
+
+    private void defineBindParamsAddFunction() {
+        var mv = visitor.visitMethod(Opcodes.ACC_PROTECTED | SYNTHETIC_FLAG, "bindParamsAdd", Type.getMethodDescriptor(ByteCodeHelper.T_VOID, ByteCodeHelper.T_PREPARED_STATEMENT, Type.getType(ByteCodeHelper.getDescriptorForClassName(entity.getTypeName()))), null, new String[]{ByteCodeHelper.T_SQLEXCEPTION.getInternalName()});
+        mv.visitAnnotation(ByteCodeHelper.T_OVERRIDE.getDescriptor(), true).visitEnd();
+
+        var varIndexThis = 0;
+        var varIndexStmt = 1;
+        var varIndexEntity = 2;
+
+        //create lists for columns and value binders
+        var columnsAndValueBindersSet = prepareColumnsAndValueBindersSet();
+
+        // variable scopes
+        var labelStartThis = new Label();
+        var labelEndThis = new Label();
+        var labelStartStmt = new Label();
+        var labelEndStmt = new Label();
+        var labelStartEntity = new Label();
+        var labelEndEntity = new Label();
+
+        // begin
+        mv.visitCode();
+
+        // variable scopes
+        mv.visitLabel(labelStartThis);
+        mv.visitLabel(labelStartStmt);
+        mv.visitLabel(labelStartEntity);
+
+        //stmt.set* bind calls
+        var i = 1;
+        for (var valueBinder : columnsAndValueBindersSet.getValueBinders()) {
+            valueBinder.bind(mv, varIndexEntity, varIndexStmt, i++);
+        }
+
+        //return
+        mv.visitInsn(Opcodes.RETURN);
+
+        // variable scopes
+        mv.visitLabel(labelEndThis);
+        mv.visitLabel(labelEndStmt);
+        mv.visitLabel(labelEndEntity);
+
+        // debug symbols
+        mv.visitLocalVariable("this", ByteCodeHelper.getDescriptorForClassName(className), null, labelStartThis, labelEndThis, varIndexThis);
+        mv.visitLocalVariable("stmt", ByteCodeHelper.T_PREPARED_STATEMENT.getDescriptor(), null, labelStartStmt, labelEndStmt, varIndexStmt);
+        mv.visitLocalVariable("entity", ByteCodeHelper.getDescriptorForClassName(entity.getTypeName()), null, labelStartEntity, labelEndEntity, varIndexEntity);
+
+        mv.visitMaxs(3, 3);
+
+        mv.visitEnd();
+    }
+
+    private void defineReadBackGeneratedValuesAddPreparedStatement() {
+        if (entity.getFields().stream().anyMatch(e -> e.getGenerated() == Generated.Type.IDENTITY)) {
+            return;
+        }
+
+        //stub method if no generated values
+        var mv = visitor.visitMethod(Opcodes.ACC_PROTECTED | SYNTHETIC_FLAG, "readBackGeneratedValuesAdd", Type.getMethodDescriptor(ByteCodeHelper.T_VOID, ByteCodeHelper.T_PREPARED_STATEMENT, Type.getType(ByteCodeHelper.getDescriptorForClassName(entity.getTypeName()))), null, new String[]{ByteCodeHelper.T_SQLEXCEPTION.getInternalName()});
+        mv.visitAnnotation(ByteCodeHelper.T_OVERRIDE.getDescriptor(), true).visitEnd();
+
+        var labelStart = new Label();
+        var labelEnd = new Label();
+
+        mv.visitLabel(labelStart);
+
+        mv.visitCode();
+        mv.visitInsn(Opcodes.RETURN);
+
+        mv.visitLabel(labelEnd);
+
+        // debug symbols
+        mv.visitLocalVariable("this", ByteCodeHelper.getDescriptorForClassName(className), null, labelStart, labelEnd, 0);
+        mv.visitLocalVariable("stmt", ByteCodeHelper.T_PREPARED_STATEMENT.getDescriptor(), null, labelStart, labelEnd, 1);
+        mv.visitLocalVariable("entity", ByteCodeHelper.getDescriptorForClassName(entity.getTypeName()), null, labelStart, labelEnd, 2);
+
+        mv.visitMaxs(0, 3);
+        mv.visitEnd();
+    }
+
+    private void defineReadBackGeneratedValuesAddResultSet() {
+        var fieldsToRead = entity.getFields().stream().filter(e -> e.getGenerated() != Generated.Type.NONE).toList();
+        if (fieldsToRead.isEmpty()) {
+            return;
+        }
+
+        var mv = visitor.visitMethod(Opcodes.ACC_PROTECTED | SYNTHETIC_FLAG, "readBackGeneratedValuesAdd", Type.getMethodDescriptor(ByteCodeHelper.T_VOID, ByteCodeHelper.T_RESULT_SET, Type.getType(ByteCodeHelper.getDescriptorForClassName(entity.getTypeName()))), null, new String[]{ByteCodeHelper.T_SQLEXCEPTION.getInternalName()});
+        mv.visitAnnotation(ByteCodeHelper.T_OVERRIDE.getDescriptor(), true).visitEnd();
+
+        visitReadFieldsIntoEntityFunctionBody(mv, fieldsToRead, true);
+    }
+    //endregion
+
+    //region update
+    private void defineQueryUpdateFunction() {
+        var mv = visitor.visitMethod(Opcodes.ACC_PROTECTED | SYNTHETIC_FLAG, "queryUpdate", Type.getMethodDescriptor(ByteCodeHelper.T_PREPARED_STATEMENT, ByteCodeHelper.T_CONNECTION), null, new String[]{ByteCodeHelper.T_SQLEXCEPTION.getInternalName()});
+        mv.visitAnnotation(ByteCodeHelper.T_OVERRIDE.getDescriptor(), true).visitEnd();
+
+        var varIndexThis = 0;
+        var varIndexConnection = 1;
+
+        var columnsAndValueBindersSet = prepareColumnsAndValueBindersSet();
+        var columnsAndValueBindersWhere = prepareColumnsAndValueBindersWhere();
+
+        var updatesString = columnsAndValueBindersSet.getColumns().stream().map(e -> "`" + e + "` = ?").collect(Collectors.joining(", "));
+        var whereString = columnsAndValueBindersWhere.getColumns().stream().map(e -> "`" + e + "` = ?").collect(Collectors.joining(" AND "));
+
+        var query = "UPDATE `" + entity.getName() + "` SET " + updatesString + " WHERE " + whereString;
+
+        // variable scopes
+        var labelStartThis = new Label();
+        var labelEndThis = new Label();
+        var labelStartConnection = new Label();
+        var labelEndConnection = new Label();
+
+        // begin
+        mv.visitCode();
+
+        // variable scopes
+        mv.visitLabel(labelStartThis);
+        mv.visitLabel(labelStartConnection);
+
+        //return connection.prepareStatement("query", Statement.RETURN_GENERATED_KEYS);
+        mv.visitVarInsn(Opcodes.ALOAD, 1);
+        mv.visitLdcInsn(query);
+        if (entity.getFields().stream().anyMatch(e -> e.getGenerated() == Generated.Type.COMPUTED)) {
+            ByteCodeHelper.visitIntInsn(mv, Statement.RETURN_GENERATED_KEYS);
+        } else {
+            mv.visitInsn(Opcodes.ICONST_0); //no flags
+        }
+        mv.visitMethodInsn(Opcodes.INVOKEINTERFACE, ByteCodeHelper.T_CONNECTION.getInternalName(), "prepareStatement", Type.getMethodDescriptor(ByteCodeHelper.T_PREPARED_STATEMENT, ByteCodeHelper.T_STRING, ByteCodeHelper.T_INT), true);
+        mv.visitInsn(Opcodes.ARETURN);
+
+        // variable scopes
+        mv.visitLabel(labelEndConnection);
+        mv.visitLabel(labelEndThis);
+
+        // debug symbols
+        mv.visitLocalVariable("this", ByteCodeHelper.getDescriptorForClassName(className), null, labelStartConnection, labelEndConnection, varIndexThis);
+        mv.visitLocalVariable("connection", ByteCodeHelper.T_CONNECTION.getDescriptor(), null, labelStartThis, labelEndThis, varIndexConnection);
+
+        mv.visitMaxs(3, 2);
+
+        mv.visitEnd();
+    }
+
+    private void defineBindParamsUpdateFunction() {
+        var mv = visitor.visitMethod(Opcodes.ACC_PROTECTED | SYNTHETIC_FLAG, "bindParamsUpdate", Type.getMethodDescriptor(ByteCodeHelper.T_VOID, ByteCodeHelper.T_PREPARED_STATEMENT, Type.getType(ByteCodeHelper.getDescriptorForClassName(entity.getTypeName()))), null, new String[]{ByteCodeHelper.T_SQLEXCEPTION.getInternalName()});
+        mv.visitAnnotation(ByteCodeHelper.T_OVERRIDE.getDescriptor(), true).visitEnd();
+
+        var varIndexThis = 0;
+        var varIndexStmt = 1;
+        var varIndexEntity = 2;
+
+        //create lists for columns and value binders
+        var columnsAndValueBindersSet = prepareColumnsAndValueBindersSet();
+        var columnsAndValueBindersWhere = prepareColumnsAndValueBindersWhere();
+
+        // variable scopes
+        var labelStartThis = new Label();
+        var labelEndThis = new Label();
+        var labelStartStmt = new Label();
+        var labelEndStmt = new Label();
+        var labelStartEntity = new Label();
+        var labelEndEntity = new Label();
+
+        // begin
+        mv.visitCode();
+
+        // variable scopes
+        mv.visitLabel(labelStartThis);
+        mv.visitLabel(labelStartStmt);
+        mv.visitLabel(labelStartEntity);
+
+        //stmt.set* bind calls
+        var i = 1;
+        for (var valueBinder : columnsAndValueBindersSet.getValueBinders()) {
+            valueBinder.bind(mv, varIndexEntity, varIndexStmt, i++);
+        }
+        for (var valueBinder : columnsAndValueBindersWhere.getValueBinders()) {
+            valueBinder.bind(mv, varIndexEntity, varIndexStmt, i++);
+        }
+
+        //return
+        mv.visitInsn(Opcodes.RETURN);
+
+        // variable scopes
+        mv.visitLabel(labelEndThis);
+        mv.visitLabel(labelEndStmt);
+        mv.visitLabel(labelEndEntity);
+
+        // debug symbols
+        mv.visitLocalVariable("this", ByteCodeHelper.getDescriptorForClassName(className), null, labelStartThis, labelEndThis, varIndexThis);
+        mv.visitLocalVariable("stmt", ByteCodeHelper.T_PREPARED_STATEMENT.getDescriptor(), null, labelStartStmt, labelEndStmt, varIndexStmt);
+        mv.visitLocalVariable("entity", ByteCodeHelper.getDescriptorForClassName(entity.getTypeName()), null, labelStartEntity, labelEndEntity, varIndexEntity);
+
+        mv.visitMaxs(3, 3);
+
+        mv.visitEnd();
+    }
+
+    private void defineReadBackGeneratedValuesUpdatePreparedStatement() {
+        if (entity.getFields().stream().anyMatch(e -> e.getGenerated() == Generated.Type.COMPUTED)) {
+            return;
+        }
+
+        //stub method if no generated values
+        var mv = visitor.visitMethod(Opcodes.ACC_PROTECTED | SYNTHETIC_FLAG, "readBackGeneratedValuesUpdate", Type.getMethodDescriptor(ByteCodeHelper.T_VOID, ByteCodeHelper.T_PREPARED_STATEMENT, Type.getType(ByteCodeHelper.getDescriptorForClassName(entity.getTypeName()))), null, new String[]{ByteCodeHelper.T_SQLEXCEPTION.getInternalName()});
+        mv.visitAnnotation(ByteCodeHelper.T_OVERRIDE.getDescriptor(), true).visitEnd();
+
+        var labelStart = new Label();
+        var labelEnd = new Label();
+
+        mv.visitLabel(labelStart);
+
+        mv.visitCode();
+        mv.visitInsn(Opcodes.RETURN);
+
+        mv.visitLabel(labelEnd);
+
+        // debug symbols
+        mv.visitLocalVariable("this", ByteCodeHelper.getDescriptorForClassName(className), null, labelStart, labelEnd, 0);
+        mv.visitLocalVariable("stmt", ByteCodeHelper.T_PREPARED_STATEMENT.getDescriptor(), null, labelStart, labelEnd, 1);
+        mv.visitLocalVariable("entity", ByteCodeHelper.getDescriptorForClassName(entity.getTypeName()), null, labelStart, labelEnd, 2);
+
+        mv.visitMaxs(0, 3);
+        mv.visitEnd();
+    }
+
+    private void defineReadBackGeneratedValuesUpdateResultSet() {
+        var fieldsToRead = entity.getFields().stream().filter(e -> e.getGenerated() == Generated.Type.COMPUTED).toList();
+        if (fieldsToRead.isEmpty()) {
+            return;
+        }
+
+        var mv = visitor.visitMethod(Opcodes.ACC_PROTECTED | SYNTHETIC_FLAG, "readBackGeneratedValuesUpdate", Type.getMethodDescriptor(ByteCodeHelper.T_VOID, ByteCodeHelper.T_RESULT_SET, Type.getType(ByteCodeHelper.getDescriptorForClassName(entity.getTypeName()))), null, new String[]{ByteCodeHelper.T_SQLEXCEPTION.getInternalName()});
+        mv.visitAnnotation(ByteCodeHelper.T_OVERRIDE.getDescriptor(), true).visitEnd();
+
+        visitReadFieldsIntoEntityFunctionBody(mv, fieldsToRead, true);
+    }
+    //endregion
+
+    //region delete
+    private void defineQueryDeleteFunction() {
+        var mv = visitor.visitMethod(Opcodes.ACC_PROTECTED | SYNTHETIC_FLAG, "queryDelete", Type.getMethodDescriptor(ByteCodeHelper.T_PREPARED_STATEMENT, ByteCodeHelper.T_CONNECTION), null, new String[]{ByteCodeHelper.T_SQLEXCEPTION.getInternalName()});
+        mv.visitAnnotation(ByteCodeHelper.T_OVERRIDE.getDescriptor(), true).visitEnd();
+
+        var varIndexThis = 0;
+        var varIndexConnection = 1;
+
+        var columnsAndValueBindersWhere = prepareColumnsAndValueBindersWhere();
+
+        var whereString = columnsAndValueBindersWhere.getColumns().stream().map(e -> "`" + e + "` = ?").collect(Collectors.joining(" AND "));
+
+        var query = "DELETE FROM `" + entity.getName() + "` WHERE " + whereString;
+
+        // variable scopes
+        var labelStartThis = new Label();
+        var labelEndThis = new Label();
+        var labelStartConnection = new Label();
+        var labelEndConnection = new Label();
+
+        // begin
+        mv.visitCode();
+
+        // variable scopes
+        mv.visitLabel(labelStartThis);
+        mv.visitLabel(labelStartConnection);
+
+        //return connection.prepareStatement("query", Statement.RETURN_GENERATED_KEYS);
+        mv.visitVarInsn(Opcodes.ALOAD, 1);
+        mv.visitLdcInsn(query);
+        if (entity.getFields().stream().anyMatch(e -> e.getGenerated() != Generated.Type.NONE)) {
+            ByteCodeHelper.visitIntInsn(mv, Statement.RETURN_GENERATED_KEYS);
+        } else {
+            mv.visitInsn(Opcodes.ICONST_0); //no flags
+        }
+        mv.visitMethodInsn(Opcodes.INVOKEINTERFACE, ByteCodeHelper.T_CONNECTION.getInternalName(), "prepareStatement", Type.getMethodDescriptor(ByteCodeHelper.T_PREPARED_STATEMENT, ByteCodeHelper.T_STRING, ByteCodeHelper.T_INT), true);
+        mv.visitInsn(Opcodes.ARETURN);
+
+        // variable scopes
+        mv.visitLabel(labelEndConnection);
+        mv.visitLabel(labelEndThis);
+
+        // debug symbols
+        mv.visitLocalVariable("this", ByteCodeHelper.getDescriptorForClassName(className), null, labelStartConnection, labelEndConnection, varIndexThis);
+        mv.visitLocalVariable("connection", ByteCodeHelper.T_CONNECTION.getDescriptor(), null, labelStartThis, labelEndThis, varIndexConnection);
+
+        mv.visitMaxs(3, 2);
+
+        mv.visitEnd();
+    }
+
+    private void defineBindParamsDeleteFunction() {
+        var mv = visitor.visitMethod(Opcodes.ACC_PROTECTED | SYNTHETIC_FLAG, "bindParamsDelete", Type.getMethodDescriptor(ByteCodeHelper.T_VOID, ByteCodeHelper.T_PREPARED_STATEMENT, Type.getType(ByteCodeHelper.getDescriptorForClassName(entity.getTypeName()))), null, new String[]{ByteCodeHelper.T_SQLEXCEPTION.getInternalName()});
+        mv.visitAnnotation(ByteCodeHelper.T_OVERRIDE.getDescriptor(), true).visitEnd();
+
+        var varIndexThis = 0;
+        var varIndexStmt = 1;
+        var varIndexEntity = 2;
+
+        //create lists for columns and value binders
+        var columnsAndValueBindersWhere = prepareColumnsAndValueBindersWhere();
+
+        // variable scopes
+        var labelStartThis = new Label();
+        var labelEndThis = new Label();
+        var labelStartStmt = new Label();
+        var labelEndStmt = new Label();
+        var labelStartEntity = new Label();
+        var labelEndEntity = new Label();
+
+        // begin
+        mv.visitCode();
+
+        // variable scopes
+        mv.visitLabel(labelStartThis);
+        mv.visitLabel(labelStartStmt);
+        mv.visitLabel(labelStartEntity);
+
+        //stmt.set* bind calls
+        var i = 1;
+        for (var valueBinder : columnsAndValueBindersWhere.getValueBinders()) {
+            valueBinder.bind(mv, varIndexEntity, varIndexStmt, i++);
+        }
+
+        //return
+        mv.visitInsn(Opcodes.RETURN);
+
+        // variable scopes
+        mv.visitLabel(labelEndThis);
+        mv.visitLabel(labelEndStmt);
+        mv.visitLabel(labelEndEntity);
+
+        // debug symbols
+        mv.visitLocalVariable("this", ByteCodeHelper.getDescriptorForClassName(className), null, labelStartThis, labelEndThis, varIndexThis);
+        mv.visitLocalVariable("stmt", ByteCodeHelper.T_PREPARED_STATEMENT.getDescriptor(), null, labelStartStmt, labelEndStmt, varIndexStmt);
+        mv.visitLocalVariable("entity", ByteCodeHelper.getDescriptorForClassName(entity.getTypeName()), null, labelStartEntity, labelEndEntity, varIndexEntity);
+
+        mv.visitMaxs(3, 3);
+
+        mv.visitEnd();
+    }
+    //endregion
+
+    //region read
+    private void defineReadFunction() {
+        var fields = entity.getFields().stream().filter(e -> e.isDatabaseField()).toList();
+        var bestConstructor = classDescription.getDeclaredConstructors().stream().filter(e -> e.getSuperConstructorParameterDescriptions().size() == 0).map(ctor -> {
+            var matchingParamCount = ctor.getConstructorParameterDescriptions().stream()
+                    .filter(param -> fields.stream().anyMatch(field -> field.getField().getDeclaringClass().getName().equals(param.getDeclaringClassName())
+                            && field.getField().getName().equals(param.getFieldName())))
+                    .count();
+            return new AbstractMap.SimpleEntry<>(ctor, matchingParamCount);
+        }).sorted(Comparator.comparingLong(e -> -e.getValue())).findFirst();
+        if (!bestConstructor.isPresent()) {
+            throw new IllegalStateException("No suitable constructor found!");
+        }
+
+        var orderedFields = bestConstructor.orElseThrow().getKey().getConstructorParameterDescriptions().stream()
+                .sorted(Comparator.comparingInt(e -> e.getParameterIndex()))
+                .map(param -> new AbstractMap.SimpleEntry<>(param, fields.stream()
+                        .filter(field -> field.getField().getDeclaringClass().getName().equals(param.getDeclaringClassName())
+                                && field.getField().getName().equals(param.getFieldName()))
+                        .findFirst().orElse(null)))
+                .toList();
+
+        //begin
+        var mv = visitor.visitMethod(Opcodes.ACC_PROTECTED | SYNTHETIC_FLAG, "read", Type.getMethodDescriptor(Type.getType(ByteCodeHelper.getDescriptorForClassName(entity.getTypeName())), ByteCodeHelper.T_RESULT_SET), null, new String[]{ByteCodeHelper.T_SQLEXCEPTION.getInternalName()});
+        mv.visitAnnotation(ByteCodeHelper.T_OVERRIDE.getDescriptor(), true).visitEnd();
+
+        var varIndexThis = 0;
+        var varIndexRes = 1;
+
+        // variable scopes
+        var labelStartThis = new Label();
+        var labelEndThis = new Label();
+        var labelStartRes = new Label();
+        var labelEndRes = new Label();
+
+        // begin
+        mv.visitCode();
+
+        // variable scopes
+        mv.visitLabel(labelStartThis);
+        mv.visitLabel(labelStartRes);
+
+        // push params
+        mv.visitLdcInsn(Type.getObjectType(entity.getTypeName().replace(".", "/")));
+        for (var paramAndField : orderedFields) {
+            if (paramAndField.getValue() == null) {
+                var fieldType = entity.getFields().stream()
+                        .filter(field -> field.getField().getDeclaringClass().getName().equals(paramAndField.getKey().getDeclaringClassName())
+                                && field.getField().getName().equals(paramAndField.getKey().getFieldName()))
+                        .findFirst().orElseThrow()
+                        .getField().getType();
+                // PUSH null, 0, or false
+                ByteCodeHelper.visitPushDefault(mv, fieldType);
+            } else {
+                // PUSH res.get*(1);
+                ByteCodeHelper.visitResultSetGetAny(mv, paramAndField.getValue(), varIndexRes);
+            }
+        }
+
+        //new Entity(...)
+        mv.visitMethodInsn(Opcodes.INVOKESPECIAL, entity.getTypeName().replace(".", "/"), "<init>",
+                           Type.getMethodDescriptor(ByteCodeHelper.T_VOID, orderedFields.stream()
+                                   .map(paramAndField -> Type.getType(ByteCodeHelper.getDescriptorForClassName(paramAndField.getKey().getParameterClassName())))
+                                   .toArray(Type[]::new)), false);
+
+        //return
+        mv.visitInsn(Opcodes.ARETURN);
+
+        // variable scopes
+        mv.visitLabel(labelEndThis);
+        mv.visitLabel(labelEndRes);
+
+        // debug symbols
+        mv.visitLocalVariable("this", ByteCodeHelper.getDescriptorForClassName(className), null, labelStartThis, labelEndThis, varIndexThis);
+        mv.visitLocalVariable("res", ByteCodeHelper.T_RESULT_SET.getDescriptor(), null, labelStartRes, labelEndRes, varIndexRes);
+
+        mv.visitMaxs(orderedFields.size() + 1, 2);
+
+        mv.visitEnd();
+    }
+    //endregion
+
+    //region util
+    private ColumnsAndValueBinders prepareColumnsAndValueBindersSet() {
+        var columns = new ArrayList<String>();
+        var valueBinders = new ArrayList<ValueBinder>();
+
+        for (DbField<?> field : entity.getFields()) {
+            if (!field.isDatabaseField()) {
+                continue;
+            }
+
+            Field f = field.getField();
+            if (f == null) {
+                if (field.isDatabaseField()) {//field defined but not present in entity class -> currently nothing to insert -> null
+                    columns.add(field.getName());
+                    valueBinders.add((mv, varIndexEntity, varIndexStmt, index) -> {
+                        ByteCodeHelper.visitIntInsn(mv, index);
+
+                        //stmt.setNull(i, Types.INTEGER);
+                        ByteCodeHelper.visitPreparedStatementSetNull(mv, field, varIndexStmt, index);
+                    });
+                }
+                continue;
+            }
+
+            columns.add(field.getName());
+            valueBinders.add((mv, varIndexEntity, varIndexStmt, index) -> {
+                if (field.isNotNull()) {
+                    //stmt.set*(i, value);
+                    ByteCodeHelper.visitPreparedStatementSetAny(mv, field, varIndexStmt, index, (mv2) -> ByteCodeHelper.visitGetField(mv2, field.getField(), varIndexEntity, className, () -> fieldsToReflect.add(field.getField()), classDescription));
+                } else {
+                    // getFieldValue(entity);
+                    ByteCodeHelper.visitGetField(mv, f, varIndexEntity, className, () -> fieldsToReflect.add(field.getField()), classDescription);
+
+                    // if (value == null)
+                    //     stmt.setNull(i, Types.*);
+                    // } else {
+                    //     stmt.set*(i, value);
+                    // }
+                    var labelAfter = new Label();
+                    var labelElse = new Label();
+                    mv.visitJumpInsn(Opcodes.IFNULL, labelElse);
+                    ByteCodeHelper.visitPreparedStatementSetAny(mv, field, varIndexStmt, index, (mv2) -> ByteCodeHelper.visitGetField(mv2, field.getField(), varIndexEntity, className, () -> fieldsToReflect.add(field.getField()), classDescription));
+                    mv.visitJumpInsn(Opcodes.GOTO, labelAfter);
+                    mv.visitLabel(labelElse);
+                    ByteCodeHelper.visitPreparedStatementSetNull(mv, field, varIndexStmt, index);
+                    mv.visitLabel(labelAfter);
+//                    mv.visitFrame(Opcodes.F_SAME, 0, new Object[0], 0, new Object[0]);
+                    mv.visitFrame(Opcodes.F_FULL, 3, new Object[]{ByteCodeHelper.T_MYSQL_ENTITY_DB_INTERFACE.getInternalName(), ByteCodeHelper.T_PREPARED_STATEMENT.getInternalName(), entity.getTypeName().replace(".", "/")}, 0, new Object[0]);
+                }
+            });
+        }
+        return new ColumnsAndValueBinders(columns, valueBinders);
+    }
+
+    private ColumnsAndValueBinders prepareColumnsAndValueBindersWhere() {
+        var columns = new ArrayList<String>();
+        var valueBinders = new ArrayList<ValueBinder>();
+
+        for (DbField<?> field : entity.getPrimaryKey().getFields()) {
+            if (!field.isDatabaseField()) {
+                continue;
+            }
+
+            Field f = field.getField();
+            if (f == null) {
+                if (field.isDatabaseField()) {//field defined but not present in entity class -> currently nothing to insert -> null
+                    columns.add(field.getName());
+                    valueBinders.add((mv, varIndexEntity, varIndexStmt, index) -> {
+                        ByteCodeHelper.visitIntInsn(mv, index);
+
+                        //stmt.setNull(i, Types.INTEGER);
+                        ByteCodeHelper.visitPreparedStatementSetNull(mv, field, varIndexStmt, index);
+                    });
+                }
+                continue;
+            }
+
+            columns.add(field.getName());
+            valueBinders.add((mv, varIndexEntity, varIndexStmt, index) -> {
+                if (field.isNotNull()) {
+                    //stmt.set*(i, value);
+                    ByteCodeHelper.visitPreparedStatementSetAny(mv, field, varIndexStmt, index, (mv2) -> ByteCodeHelper.visitGetField(mv2, field.getField(), varIndexEntity, className, () -> fieldsToReflect.add(field.getField()), classDescription));
+                } else {
+                    // getFieldValue(entity);
+                    ByteCodeHelper.visitGetField(mv, f, varIndexEntity, className, () -> fieldsToReflect.add(field.getField()), classDescription);
+
+                    // if (value == null)
+                    //     stmt.setNull(i, Types.*);
+                    // } else {
+                    //     stmt.set*(i, value);
+                    // }
+                    var labelAfter = new Label();
+                    var labelElse = new Label();
+                    mv.visitJumpInsn(Opcodes.IFNULL, labelElse);
+                    ByteCodeHelper.visitPreparedStatementSetAny(mv, field, varIndexStmt, index, (mv2) -> ByteCodeHelper.visitGetField(mv2, field.getField(), varIndexEntity, className, () -> fieldsToReflect.add(field.getField()), classDescription));
+                    mv.visitJumpInsn(Opcodes.GOTO, labelAfter);
+                    mv.visitLabel(labelElse);
+                    ByteCodeHelper.visitPreparedStatementSetNull(mv, field, varIndexStmt, index);
+                    mv.visitLabel(labelAfter);
+//                    mv.visitFrame(Opcodes.F_SAME, 0, new Object[0], 0, new Object[0]);
+                    mv.visitFrame(Opcodes.F_FULL, 3, new Object[]{ByteCodeHelper.T_MYSQL_ENTITY_DB_INTERFACE.getInternalName(), ByteCodeHelper.T_PREPARED_STATEMENT.getInternalName(), entity.getTypeName().replace(".", "/")}, 0, new Object[0]);
+                }
+            });
+        }
+        return new ColumnsAndValueBinders(columns, valueBinders);
+    }
+
+    private void visitReadFieldsIntoEntityFunctionBody(MethodVisitor mv, List<DbField<?>> fields, boolean moveNext) {
+        var varIndexThis = 0;
+        var varIndexRes = 1;
+        var varIndexEntity = 2;
+
+        // variable scopes
+        var labelStartThis = new Label();
+        var labelEndThis = new Label();
+        var labelStartRes = new Label();
+        var labelEndRes = new Label();
+        var labelStartEntity = new Label();
+        var labelEndEntity = new Label();
+
+        // begin
+        mv.visitCode();
+
+        // variable scopes
+        mv.visitLabel(labelStartThis);
+        mv.visitLabel(labelStartRes);
+        mv.visitLabel(labelStartEntity);
+
+        if (moveNext) {
+            // if (!res.next()) {
+            //     throw new SQLException("Missing generated keys for entity but are required");
+            // }
+            var labelResHasNext = new Label();
+            mv.visitVarInsn(Opcodes.ALOAD, varIndexRes);
+            mv.visitMethodInsn(Opcodes.INVOKEINTERFACE, ByteCodeHelper.T_RESULT_SET.getInternalName(), "next", Type.getMethodDescriptor(ByteCodeHelper.T_BOOL), true);
+            mv.visitJumpInsn(Opcodes.IFNE, labelResHasNext);
+            ByteCodeHelper.visitThrowSQLException(mv, "Missing generated keys for entity but are required");
+            mv.visitLabel(labelResHasNext);
+        }
+
+        for (var field : fields) {
+            // var value = res.get*(1);
+            Consumer<MethodVisitor> resGetValue = (mv2) -> {
+                ByteCodeHelper.visitResultSetGetAny(mv2, field, varIndexRes);
+            };
+
+            // *SET*(entity, field, value);
+            ByteCodeHelper.visitSetField(mv, field.getField(), resGetValue, varIndexEntity, className, () -> fieldsToReflect.add(field.getField()), classDescription);
+        }
+
+        //return
+        mv.visitInsn(Opcodes.RETURN);
+
+        // variable scopes
+        mv.visitLabel(labelEndThis);
+        mv.visitLabel(labelEndRes);
+        mv.visitLabel(labelEndEntity);
+
+        // debug symbols
+        mv.visitLocalVariable("this", ByteCodeHelper.getDescriptorForClassName(className), null, labelStartThis, labelEndThis, varIndexThis);
+        mv.visitLocalVariable("res", ByteCodeHelper.T_RESULT_SET.getDescriptor(), null, labelStartRes, labelEndRes, varIndexRes);
+        mv.visitLocalVariable("entity", ByteCodeHelper.getDescriptorForClassName(entity.getTypeName()), null, labelStartEntity, labelEndEntity, varIndexEntity);
+
+        mv.visitMaxs(3, 3);
+
+        mv.visitEnd();
+    }
+
+    private interface ValueBinder {
+        void bind(MethodVisitor mv, int varIndexEntity, int varIndexStmt, int index);
+    }
+
+    @AllArgsConstructor
+    @Getter
+    private static class ColumnsAndValueBinders {
+        private final List<String> columns;
+        private final List<ValueBinder> valueBinders;
+    }
+    //endregion
+}

mysql/src/main/java/jef/platform/mysql/dbinterface/MysqlInterfaceClassLoader.java

@@ -0,0 +1,66 @@
+package jef.platform.mysql.dbinterface;
+
+import jef.serializable.SerializableObject;
+
+import java.io.IOException;
+import java.io.InputStream;
+import java.net.URL;
+import java.util.Enumeration;
+import java.util.HashMap;
+import java.util.Map;
+import java.util.stream.Stream;
+
+public class MysqlInterfaceClassLoader extends ClassLoader {
+    private final Map<String, byte[]> resources = new HashMap<>();
+
+    public MysqlInterfaceClassLoader(String name, ClassLoader parent) {
+        super(name, parent);
+    }
+
+    public MysqlInterfaceClassLoader(ClassLoader parent) {
+        super(parent);
+    }
+
+    public MysqlInterfaceClassLoader() {
+    }
+
+    public <T extends SerializableObject> Class<? extends MysqlEntityDbInterface<T>> defineClass(String className, byte[] byteCode) {
+        synchronized (resources) {
+            var resourceName = className.replace(".", "/") + ".class";
+            resources.put(resourceName, byteCode);
+        }
+        return (Class<? extends MysqlEntityDbInterface<T>>) super.defineClass(className, byteCode, 0, byteCode.length);
+    }
+
+    @Override
+    public URL getResource(String name) {
+        return super.getResource(name);
+    }
+
+    @Override
+    public Enumeration<URL> getResources(String name) throws IOException {
+        return super.getResources(name);
+    }
+
+    @Override
+    public InputStream getResourceAsStream(String name) {
+        synchronized (resources) {
+            return super.getResourceAsStream(name);
+        }
+    }
+
+    @Override
+    public Stream<URL> resources(String name) {
+        return super.resources(name);
+    }
+
+    @Override
+    protected URL findResource(String moduleName, String name) throws IOException {
+        return super.findResource(moduleName, name);
+    }
+
+    @Override
+    protected URL findResource(String name) {
+        return super.findResource(name);
+    }
+}

mysql/src/main/java/jef/platform/mysql/dbinterface/MysqlInterfaceFactory.java

@@ -0,0 +1,33 @@
+package jef.platform.mysql.dbinterface;
+
+import jef.model.DbContext;
+import jef.model.DbEntity;
+import jef.serializable.SerializableObject;
+import lombok.AllArgsConstructor;
+
+import java.util.HashMap;
+import java.util.Map;
+
+@AllArgsConstructor
+public class MysqlInterfaceFactory {
+    private static MysqlInterfaceFactory getInstance(Class<DbContext> context) {
+        return new MysqlInterfaceFactory(context);
+    }
+
+    private final Class<DbContext> context;
+    private final MysqlInterfaceClassLoader classLoader = new MysqlInterfaceClassLoader();
+    private final Map<Class<? extends SerializableObject>, Class<? extends MysqlEntityDbInterface<? extends SerializableObject>>> cache = new HashMap<>();
+
+    public <T extends SerializableObject> Class<? extends MysqlEntityDbInterface<T>> getInterface(DbEntity<T> entity) {
+        synchronized (cache) {
+            return (Class<? extends MysqlEntityDbInterface<T>>) cache.computeIfAbsent(entity.getType(), ignored -> generateInterface(entity));
+        }
+    }
+
+    private <T extends SerializableObject> Class<? extends MysqlEntityDbInterface<? extends SerializableObject>> generateInterface(DbEntity<T> entity) {
+        var generator = new MysqlEntityDbInterfaceGenerator<T>(context, entity);
+        generator.generate();
+        var byteCode = generator.getByteCode();
+        return classLoader.defineClass(generator.getClassName(), byteCode);
+    }
+}

mysql/src/test/java/jef/platform/mysql/MysqlSimpleIntegrativeTest.java

@@ -0,0 +1,172 @@
+package jef.platform.mysql;
+
+import jef.DbSet;
+import jef.model.DbContext;
+import jef.model.DbContextOptions;
+import jef.model.annotations.Clazz;
+import jef.model.annotations.ForeignKey;
+import jef.platform.base.Database;
+import jef.platform.base.DatabaseOptions;
+import jef.serializable.SerializableObject;
+import lombok.AllArgsConstructor;
+import lombok.EqualsAndHashCode;
+import lombok.Getter;
+import lombok.NoArgsConstructor;
+import lombok.Setter;
+import lombok.ToString;
+import org.junit.jupiter.api.Test;
+
+import java.sql.DriverManager;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertFalse;
+import static org.junit.jupiter.api.Assertions.assertNotEquals;
+import static org.junit.jupiter.api.Assertions.assertNotSame;
+import static org.junit.jupiter.api.Assertions.assertTrue;
+
+class MysqlSimpleIntegrativeTest {
+    @Test
+    void queryEntities() throws Exception {
+        //setup
+        Class.forName("com.mysql.cj.jdbc.Driver").getDeclaredConstructor().newInstance();
+        var dboptions = new DatabaseOptions("jdbc:mysql://localhost/test", "test", "password", getClass().getSimpleName(), null);
+        var ctxoptions = new DbContextOptions(dboptions);
+        var conn = DriverManager.getConnection(dboptions.getUrl(), dboptions.getUser(), dboptions.getPassword());
+        var sqlPlatform = new MysqlPlatform();
+        var db = new MysqlDatabase(conn, dboptions, sqlPlatform);
+        var ctx = new Ctx(db, ctxoptions);
+
+        //test
+        var result = ctx.getCompanies().toList();
+        System.out.println(result);
+
+        //assert
+
+    }
+
+    @Test
+    void addEntity() throws Exception {
+        //setup
+        Class.forName("com.mysql.cj.jdbc.Driver").getDeclaredConstructor().newInstance();
+        var dboptions = new DatabaseOptions("jdbc:mysql://localhost/test", "test", "password", getClass().getSimpleName(), null);
+        var ctxoptions = new DbContextOptions(dboptions);
+        var conn = DriverManager.getConnection(dboptions.getUrl(), dboptions.getUser(), dboptions.getPassword());
+        var sqlPlatform = new MysqlPlatform();
+        var db = new MysqlDatabase(conn, dboptions, sqlPlatform);
+        var ctx = new Ctx(db, ctxoptions);
+
+        //test
+        var entity = new Company();
+        entity.setName("some company");
+        ctx.getCompanies().add(entity);
+
+        //assert
+        assertNotEquals(0, entity.getId());
+    }
+
+    @Test
+    void updateEntity() throws Exception {
+        //setup
+        Class.forName("com.mysql.cj.jdbc.Driver").getDeclaredConstructor().newInstance();
+        var dboptions = new DatabaseOptions("jdbc:mysql://localhost/test", "test", "password", getClass().getSimpleName(), null);
+        var ctxoptions = new DbContextOptions(dboptions);
+        var conn = DriverManager.getConnection(dboptions.getUrl(), dboptions.getUser(), dboptions.getPassword());
+        var sqlPlatform = new MysqlPlatform();
+        var db = new MysqlDatabase(conn, dboptions, sqlPlatform);
+        var ctx = new Ctx(db, ctxoptions);
+
+        var entity = new Company();
+        entity.setName("some company");
+        ctx.getCompanies().add(entity);
+        assertNotEquals(0, entity.getId());
+
+        //test
+        entity.setName("other company");
+        ctx.getCompanies().update(entity);
+
+        //assert
+        var id = entity.getId();
+//        var fromdb = ctx.getCompanies().filter(e -> e.id == entity.getId()).toList().stream().findFirst().orElseThrow();
+//        var fromdb = ctx.getCompanies().filter(e -> e.id == entity.id).toList().stream().findFirst().orElseThrow();
+//        var fromdb = ctx.getCompanies().filter(e -> e.id == id).toList().stream().findFirst().orElseThrow();
+        var fromdb = ctx.getCompanies().toList().stream().filter(e -> e.id == id).findFirst().orElseThrow();
+//        var fromdb = ctx.getCompanies().toList().stream().filter(e -> e.id == 5).findFirst().orElseThrow();
+        assertEquals(entity, fromdb);
+        assertNotSame(entity, fromdb);
+    }
+
+    @Test
+    void deleteEntity() throws Exception {
+        //setup
+        Class.forName("com.mysql.cj.jdbc.Driver").getDeclaredConstructor().newInstance();
+        var dboptions = new DatabaseOptions("jdbc:mysql://localhost/test", "test", "password", getClass().getSimpleName(), null);
+        var ctxoptions = new DbContextOptions(dboptions);
+        var conn = DriverManager.getConnection(dboptions.getUrl(), dboptions.getUser(), dboptions.getPassword());
+        var sqlPlatform = new MysqlPlatform();
+        var db = new MysqlDatabase(conn, dboptions, sqlPlatform);
+        var ctx = new Ctx(db, ctxoptions);
+
+        var entity = new Company();
+        entity.setName("some company");
+        ctx.getCompanies().add(entity);
+        assertNotEquals(0, entity.getId());
+
+        //test
+        ctx.getCompanies().delete(entity);
+
+        //assert
+        var id = entity.getId();
+//        var fromdb = ctx.getCompanies().filter(e -> e.id == entity.getId()).toList().stream().findFirst().orElseThrow();//TODO get this to work too
+//        var fromdb = ctx.getCompanies().filter(e -> e.id == entity.id).toList().stream().findFirst().orElseThrow();
+//        var fromdb = ctx.getCompanies().filter(e -> e.id == id).toList().stream().findFirst().orElseThrow();
+        var fromdb = ctx.getCompanies().toList().stream().noneMatch(e -> e.id == id);
+        assertTrue(fromdb);
+    }
+
+    @Getter
+    public static class Ctx extends DbContext {
+        @Clazz(Company.class)
+        private DbSet<Company> companies;
+        @Clazz(Employee.class)
+        private DbSet<Employee> employees;
+
+        public Ctx() {
+        }
+
+        public Ctx(Database database, DbContextOptions options) {
+            super(database, options);
+        }
+    }
+
+    @Getter
+    @Setter
+    @AllArgsConstructor
+    @NoArgsConstructor
+    @ToString
+    @EqualsAndHashCode(callSuper = false)
+    public static class Company extends SerializableObject {
+        private int id;
+        private String name;
+
+        private Employee ceo;
+    }
+
+    @Getter
+    @Setter
+    @AllArgsConstructor
+    @NoArgsConstructor
+    @ToString
+    @EqualsAndHashCode(callSuper = false)
+    public static class Employee extends SerializableObject {
+        private int id;
+        private String name;
+
+        private Employee boss;
+        @ForeignKey(getterOrField = "boss")
+        private int bossId;
+
+        private Company company;
+        @ForeignKey(getterOrField = "company")
+        private int companyId;
+    }
+}

mysql/src/test/java/jef/platform/mysql/dbinterface/MysqlEntityDbInterfaceGeneratorTest.java

@@ -0,0 +1,86 @@
+package jef.platform.mysql.dbinterface;
+
+import jef.DbSet;
+import jef.model.DbContext;
+import jef.model.DbContextOptions;
+import jef.model.ModelBuilder;
+import jef.model.annotations.Clazz;
+import jef.model.annotations.ForeignKey;
+import jef.platform.base.Database;
+import jef.serializable.SerializableObject;
+import lombok.AllArgsConstructor;
+import lombok.EqualsAndHashCode;
+import lombok.Getter;
+import lombok.NoArgsConstructor;
+import lombok.Setter;
+import lombok.ToString;
+import org.junit.jupiter.api.Test;
+
+import java.io.IOException;
+import java.nio.file.Files;
+import java.nio.file.Path;
+import java.nio.file.StandardOpenOption;
+
+class MysqlEntityDbInterfaceGeneratorTest {
+    private static final String GENERATED_MIGRATIONS_DBINTERFACES = "target/test-generated-dbinterfaces/";
+//    private static final String GENERATED_MIGRATIONS_FOLDER_SRC = GENERATED_MIGRATIONS_DBINTERFACES + "src/";
+    private static final String GENERATED_MIGRATIONS_FOLDER_TARGET = GENERATED_MIGRATIONS_DBINTERFACES + "target/";
+
+    @Test
+    void generate() throws IOException {
+        var mb = ModelBuilder.from(Ctx.class);
+        var generator = new MysqlEntityDbInterfaceGenerator<>(Ctx.class, mb.getEntity(Employee.class));
+        generator.generate();
+//        var path = Path.of(GENERATED_MIGRATIONS_FOLDER_TARGET, "MysqlEntityDbInterfaceGeneratorTest", "MysqlEntityDbInterfaceGeneratorTest$Ctx$EmployeeMysqlEntityDbInterface.class");
+        var path = Path.of(GENERATED_MIGRATIONS_FOLDER_TARGET, "MysqlEntityDbInterfaceGeneratorTest", "EmployeeMysqlEntityDbInterface.class");
+        path.toFile().getParentFile().mkdirs();
+        Files.write(path, generator.getByteCode(), StandardOpenOption.CREATE, StandardOpenOption.TRUNCATE_EXISTING, StandardOpenOption.WRITE);
+    }
+
+    @Getter
+    public static class Ctx extends DbContext {
+        @Clazz(Company.class)
+        private DbSet<Company> companies;
+        @Clazz(Employee.class)
+        private DbSet<Employee> employees;
+
+        public Ctx() {
+        }
+
+        public Ctx(Database database, DbContextOptions options) {
+            super(database, options);
+        }
+    }
+
+//    @Getter
+//    @Setter
+    @AllArgsConstructor
+    @NoArgsConstructor
+    @ToString
+    @EqualsAndHashCode(callSuper = false)
+    public static class Company extends SerializableObject {
+        private int id;
+        private String name;
+
+        private Employee ceo;
+    }
+
+//    @Getter
+//    @Setter
+    @AllArgsConstructor
+    @NoArgsConstructor
+    @ToString
+    @EqualsAndHashCode(callSuper = false)
+    public static class Employee extends SerializableObject {
+        private int id;
+        private String name;
+
+        private Employee boss;
+        @ForeignKey(getterOrField = "boss")
+        private int bossId;
+
+        private Company company;
+        @ForeignKey(getterOrField = "company")
+        private int companyId;
+    }
+}