initial commit

src/main/java/jef/expressions/AndExpression.java

@@ -0,0 +1,33 @@
+package jef.expressions;
+
+import lombok.AllArgsConstructor;
+import lombok.Getter;
+
+import java.util.List;
+import java.util.stream.Collectors;
+
+@Getter
+@AllArgsConstructor
+public class AndExpression implements Expression {
+    private final List<Expression> exprs;
+
+    public AndExpression(Expression... exprs) {
+        this.exprs = List.of(exprs);
+    }
+
+    @Override
+    public Type getType() {
+        return Type.AND;
+    }
+
+    @Override
+    public String toString() {
+        return exprs.stream().map(e -> {
+            if (e instanceof OrExpression) {
+                return "(" + e + ")";
+            } else {
+                return e.toString();
+            }
+        }).collect(Collectors.joining(" AND "));
+    }
+}