コード例 #1
0
    public void addSetter(MetaBeanProperty property) throws Exception {
      MetaMethod setter = property.getSetter();

      // GENERATE public <return-type> <setter>(<type> v) { <return-type> v = super.<setter>(v);
      // <prop>Set = true; return v; }

      Type paramType = Type.getType(setter.getParameterTypes()[0].getTheClass());
      Type returnType = Type.getType(setter.getReturnType());
      String setterDescriptor = Type.getMethodDescriptor(returnType, new Type[] {paramType});
      MethodVisitor methodVisitor =
          visitor.visitMethod(
              Opcodes.ACC_PUBLIC, setter.getName(), setterDescriptor, null, new String[0]);
      methodVisitor.visitCode();

      // GENERATE super.<setter>(v)

      methodVisitor.visitVarInsn(Opcodes.ALOAD, 0);
      methodVisitor.visitVarInsn(paramType.getOpcode(Opcodes.ILOAD), 1);

      methodVisitor.visitMethodInsn(
          Opcodes.INVOKESPECIAL,
          superclassType.getInternalName(),
          setter.getName(),
          setterDescriptor);

      // END

      // GENERATE <prop>Set = true

      methodVisitor.visitVarInsn(Opcodes.ALOAD, 0);
      methodVisitor.visitLdcInsn(true);
      methodVisitor.visitFieldInsn(
          Opcodes.PUTFIELD,
          generatedType.getInternalName(),
          String.format("%sSet", property.getName()),
          Type.BOOLEAN_TYPE.getDescriptor());

      // END

      methodVisitor.visitInsn(returnType.getOpcode(Opcodes.IRETURN));
      methodVisitor.visitMaxs(0, 0);
      methodVisitor.visitEnd();
    }
コード例 #2
0
    private void addConventionGetter(String getterName, String flagName, MetaBeanProperty property)
        throws Exception {
      // GENERATE public <type> <getter>() { return
      // (<type>)getConventionMapping().getConventionValue(super.<getter>(), '<prop>', <prop>Set); }
      MetaMethod getter = property.getGetter();

      Type returnType = Type.getType(getter.getReturnType());
      String methodDescriptor = Type.getMethodDescriptor(returnType, new Type[0]);
      MethodVisitor methodVisitor =
          visitor.visitMethod(
              Opcodes.ACC_PUBLIC, getterName, methodDescriptor, null, new String[0]);
      methodVisitor.visitCode();

      methodVisitor.visitVarInsn(Opcodes.ALOAD, 0);
      methodVisitor.visitMethodInsn(
          Opcodes.INVOKEINTERFACE,
          conventionAwareType.getInternalName(),
          "getConventionMapping",
          Type.getMethodDescriptor(conventionMappingType, new Type[0]));

      methodVisitor.visitVarInsn(Opcodes.ALOAD, 0);
      methodVisitor.visitMethodInsn(
          Opcodes.INVOKESPECIAL, superclassType.getInternalName(), getterName, methodDescriptor);

      Type boxedType = null;
      if (getter.getReturnType().isPrimitive()) {
        // Box value
        boxedType =
            Type.getType(JavaReflectionUtil.getWrapperTypeForPrimitiveType(getter.getReturnType()));
        String valueOfMethodDescriptor =
            Type.getMethodDescriptor(boxedType, new Type[] {returnType});
        methodVisitor.visitMethodInsn(
            Opcodes.INVOKESTATIC, boxedType.getInternalName(), "valueOf", valueOfMethodDescriptor);
      }

      methodVisitor.visitLdcInsn(property.getName());

      methodVisitor.visitVarInsn(Opcodes.ALOAD, 0);
      methodVisitor.visitFieldInsn(
          Opcodes.GETFIELD,
          generatedType.getInternalName(),
          flagName,
          Type.BOOLEAN_TYPE.getDescriptor());

      String getConventionValueDesc =
          Type.getMethodDescriptor(
              ConventionMapping.class.getMethod(
                  "getConventionValue", Object.class, String.class, Boolean.TYPE));
      methodVisitor.visitMethodInsn(
          Opcodes.INVOKEINTERFACE,
          conventionMappingType.getInternalName(),
          "getConventionValue",
          getConventionValueDesc);

      if (getter.getReturnType().isPrimitive()) {
        // Unbox value
        methodVisitor.visitTypeInsn(Opcodes.CHECKCAST, boxedType.getInternalName());
        String valueMethodDescriptor = Type.getMethodDescriptor(returnType, new Type[0]);
        methodVisitor.visitMethodInsn(
            Opcodes.INVOKEVIRTUAL,
            boxedType.getInternalName(),
            getter.getReturnType().getName() + "Value",
            valueMethodDescriptor);
      } else {
        // Cast to return type
        methodVisitor.visitTypeInsn(
            Opcodes.CHECKCAST,
            getter.getReturnType().isArray()
                ? "[" + returnType.getElementType().getDescriptor()
                : returnType.getInternalName());
      }

      methodVisitor.visitInsn(returnType.getOpcode(Opcodes.IRETURN));
      methodVisitor.visitMaxs(0, 0);
      methodVisitor.visitEnd();
    }