コード例 #1
0
    public void addSetMethod(MetaBeanProperty property) throws Exception {
      MetaMethod setter = property.getSetter();
      Type paramType = Type.getType(setter.getParameterTypes()[0].getTheClass());
      Type returnType = Type.getType(setter.getReturnType());
      String setterDescriptor = Type.getMethodDescriptor(returnType, new Type[] {paramType});

      // GENERATE public void <propName>(<type> v) { <setter>(v) }
      String setMethodDescriptor = Type.getMethodDescriptor(Type.VOID_TYPE, new Type[] {paramType});
      MethodVisitor methodVisitor =
          visitor.visitMethod(
              Opcodes.ACC_PUBLIC, property.getName(), setMethodDescriptor, null, new String[0]);
      methodVisitor.visitCode();

      // GENERATE <setter>(v)

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

      methodVisitor.visitMethodInsn(
          Opcodes.INVOKEVIRTUAL,
          generatedType.getInternalName(),
          setter.getName(),
          setterDescriptor);

      // END

      methodVisitor.visitInsn(Opcodes.RETURN);
      methodVisitor.visitMaxs(0, 0);
      methodVisitor.visitEnd();
    }
コード例 #2
0
    public void addGetter(MetaBeanProperty property) throws Exception {
      MetaMethod getter = property.getGetter();

      // GENERATE private boolean <prop>Set;

      String flagName = String.format("%sSet", property.getName());
      visitor.visitField(
          Opcodes.ACC_PRIVATE, flagName, Type.BOOLEAN_TYPE.getDescriptor(), null, null);

      addConventionGetter(getter.getName(), flagName, property);

      String getterName = getter.getName();
      Class<?> returnType = getter.getReturnType();

      // If it's a boolean property, there can be get or is type variants.
      // If this class has both, decorate both.
      if (returnType.equals(Boolean.TYPE)) {
        boolean getterIsIsMethod = getterName.startsWith("is");
        String propertyNameComponent = getterName.substring(getterIsIsMethod ? 2 : 3);
        String alternativeGetterName =
            String.format("%s%s", getterIsIsMethod ? "get" : "is", propertyNameComponent);

        try {
          type.getMethod(alternativeGetterName);
          addConventionGetter(alternativeGetterName, flagName, property);
        } catch (NoSuchMethodException e) {
          // ignore, no method to override
        }
      }
    }
コード例 #3
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 #4
0
    public void addActionMethod(MetaMethod method) throws Exception {
      Type actionImplType = Type.getType(ClosureBackedAction.class);
      Type closureType = Type.getType(Closure.class);

      String methodDescriptor = Type.getMethodDescriptor(Type.VOID_TYPE, new Type[] {closureType});

      // GENERATE public void <method>(Closure v) { <method>(new ClosureBackedAction(v)); }
      MethodVisitor methodVisitor =
          visitor.visitMethod(
              Opcodes.ACC_PUBLIC, method.getName(), methodDescriptor, null, new String[0]);
      methodVisitor.visitCode();

      // GENERATE <method>(new ClosureBackedAction(v));
      methodVisitor.visitVarInsn(Opcodes.ALOAD, 0);

      // GENERATE new ClosureBackedAction(v);
      methodVisitor.visitTypeInsn(Opcodes.NEW, actionImplType.getInternalName());
      methodVisitor.visitInsn(Opcodes.DUP);
      methodVisitor.visitVarInsn(Opcodes.ALOAD, 1);
      String constuctorDescriptor =
          Type.getMethodDescriptor(Type.VOID_TYPE, new Type[] {closureType});
      methodVisitor.visitMethodInsn(
          Opcodes.INVOKESPECIAL, actionImplType.getInternalName(), "<init>", constuctorDescriptor);

      methodDescriptor =
          Type.getMethodDescriptor(
              Type.getType(method.getReturnType()),
              new Type[] {Type.getType(method.getParameterTypes()[0].getTheClass())});
      methodVisitor.visitMethodInsn(
          Opcodes.INVOKEVIRTUAL,
          generatedType.getInternalName(),
          method.getName(),
          methodDescriptor);

      methodVisitor.visitInsn(Opcodes.RETURN);
      methodVisitor.visitMaxs(0, 0);
      methodVisitor.visitEnd();
    }
コード例 #5
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();
    }