add method reference support to asm parser

README.md

@@ -8,7 +8,6 @@
     - references to platform specific impls
 
 ## Asm
-- method references
 - equals function for primitive and string + String::equalsIgnoreCase
 - equals function for registered primitive conversion types
 - IConst0Fixer: IConst0/1 on its own => false/true

src/main/java/jef/asm/AsmParser.java

@@ -46,20 +46,17 @@ public class AsmParser {
     }
 
     private AsmParseResult parseLambdaExpression() throws Exception {
-        var cls = lambda.getClass();
+        var cls = (Class) lambda.getClass();
         var loader = cls.getClassLoader();
-        InputStream is;
-        if (cls.getName().contains("$$Lambda$")) {
-            is = loader.getResourceAsStream(cls.getName().split("\\$\\$")[0].replace(".", "/") + ".class");
-        } else {
-            is = loader.getResourceAsStream(cls.getName().replace(".", "/") + ".class");
-        }
         var writeReplace = cls.getDeclaredMethod("writeReplace");
         writeReplace.setAccessible(true);
         var serlambda = (SerializedLambda) writeReplace.invoke(lambda);
         Object[] args = IntStream.range(0, serlambda.getCapturedArgCount()).mapToObj(serlambda::getCapturedArg).toArray();
 
+        var classname = serlambda.getImplClass();
         var lambdaname = serlambda.getImplMethodName();
+        cls = Class.forName(classname.replace("/", "."));
+        var is = loader.getResourceAsStream(cls.getName().replace(".", "/") + ".class");
 
         var cr = new ClassReader(is);
         var visiter = new FilterClassVisitor(Opcodes.ASM9, lambdaname, args);

src/test/java/jef/asm/OptimizedAsmParserTest.java

@@ -159,6 +159,13 @@ public class OptimizedAsmParserTest {
         Assertions.assertEquals("`i` = 1337", act);
     }
 
+    @Test
+    public void testMethodReference() throws AsmParseException {
+        String act;
+        act = new OptimizedAsmParser((SerializablePredicate<TestClass>) TestClass::isB).parse().getExpression().toString();
+        Assertions.assertEquals("`b`", act);
+    }
+
     @Getter
     public static class TestClass extends SerializableObject {
         public int i = 1;
@@ -166,5 +173,6 @@ public class OptimizedAsmParserTest {
         public double d;
         public float f;
         public long l;
+        public boolean b;
     }
 }