Package org.apache.xbean.asm4

Examples of org.apache.xbean.asm4.Label


        mv.visitCode();

        /* if (deleted) return; */
        mv.visitVarInsn(ALOAD, 0);
        mv.visitFieldInsn(GETFIELD, implClassName, DELETED, "Z");
        Label notDeleted = new Label();
        mv.visitJumpInsn(IFEQ, notDeleted);
        mv.visitInsn(RETURN);
        mv.visitLabel(notDeleted);

        // deleted = true;
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        mv.visitCode();

        // if (deleted) return null;
        mv.visitVarInsn(ALOAD, 0);
        mv.visitFieldInsn(GETFIELD, implClassName, DELETED, "Z");
        Label notDeleted = new Label();
        mv.visitJumpInsn(IFEQ, notDeleted);
        mv.visitInsn(ACONST_NULL);
        mv.visitInsn(ARETURN);
        mv.visitLabel(notDeleted);
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        mv.visitCode();

        // if (deleted) return;
        mv.visitVarInsn(ALOAD, 0);
        mv.visitFieldInsn(GETFIELD, implClassName, DELETED, "Z");
        Label notDeleted = new Label();
        mv.visitJumpInsn(IFEQ, notDeleted);
        mv.visitInsn(RETURN);
        mv.visitLabel(notDeleted);

        for (CmrField cmrField : cmrFields) {
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        // if (${cmrField.name}.equals(arg1))
        mv.visitLdcInsn(cmrField.getName());
        mv.visitVarInsn(ALOAD, 1);
        mv.visitMethodInsn(INVOKEVIRTUAL, "java/lang/String", "equals", "(Ljava/lang/Object;)Z");
        // if not equal jump to end
        Label end = new Label();
        mv.visitJumpInsn(IFEQ, end);

        // collection style relationship.  Generate the code to add this object to the
        // collection already anchored in the CMR field. 
        if (cmrField.getCmrStyle() != CmrStyle.SINGLE) {
            mv.visitVarInsn(ALOAD, 0);
            mv.visitFieldInsn(GETFIELD, implClassName, cmrField.getName(), cmrField.getDescriptor());
            mv.visitVarInsn(ASTORE, 3);
            mv.visitVarInsn(ALOAD, 3);
            Label fieldNotNull = new Label();
            mv.visitJumpInsn(IFNONNULL, fieldNotNull);
            // lazy creation of the collection type if not already created.
            mv.visitTypeInsn(NEW, cmrField.getInitialValueType().getInternalName());
            mv.visitInsn(DUP);
            mv.visitMethodInsn(INVOKESPECIAL, cmrField.getInitialValueType().getInternalName(), "<init>", "()V");
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        // if (${cmrField.name}.equals(arg1))
        mv.visitLdcInsn(cmrField.getName());
        mv.visitVarInsn(ALOAD, 1);
        mv.visitMethodInsn(INVOKEVIRTUAL, "java/lang/String", "equals", "(Ljava/lang/Object;)Z");
        // if not equal jump to end
        Label end = new Label();
        mv.visitJumpInsn(IFEQ, end);
       
        // collection valued CMR field.  Remove the object from the collection.
        if (cmrField.getCmrStyle() != CmrStyle.SINGLE) {
            // ${cmrField.name}.remove(arg2)
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            mv.visitEnd();
        }
        {
            mv = cw.visitMethod(ACC_PROTECTED, "locateUserTransaction", "()Ljavax/transaction/UserTransaction;", null, null);
            mv.visitCode();
            Label l0 = new Label();
            Label l1 = new Label();
            Label l2 = new Label();
            mv.visitTryCatchBlock(l0, l1, l2, "javax/naming/NamingException");
            mv.visitLabel(l0);
            mv.visitMethodInsn(INVOKESTATIC, "org/apache/openejb/loader/SystemInstance", "get", "()Lorg/apache/openejb/loader/SystemInstance;");
            mv.visitLdcInsn(Type.getType("Lorg/apache/openejb/spi/ContainerSystem;"));
            mv.visitMethodInsn(INVOKEVIRTUAL, "org/apache/openejb/loader/SystemInstance", "getComponent", "(Ljava/lang/Class;)Ljava/lang/Object;");
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        }

        @Override
        public MethodVisitor visitMethod(final int access, final String name, final String desc,
            final String signature, final String[] exceptions) {
            final MethodVisitor toWrap = wrapped.visitMethod(access, name, desc, signature, exceptions);
            final ClassInfo classInfo = (ClassInfo) wrapped.getInfo();

            // MethodInfo may not always come from a descriptor, so we must go by the
            // Member represented. Make sure the method either has a valid name or is a constructor:
            final MethodInfo compareMethodInfo = new MethodInfo(classInfo, name, desc);
            if (!compareMethodInfo.isConstructor() && !isJavaIdentifier(name)) {
                return toWrap;
            }
            MethodInfo testMethodInfo = null;
            final Member member;
            try {
                member = compareMethodInfo.get();
                // should be the most recently added method, so iterate backward:
                for (int i = classInfo.getMethods().size() - 1; i >= 0; i--) {
                    final MethodInfo atI = classInfo.getMethods().get(i);
                    if (atI.getName().equals(name) && atI.get().equals(member)) {
                        testMethodInfo = atI;
                        break;
                    }
                }
            } catch (final ClassNotFoundException e) {
                return toWrap;
            }
            if (testMethodInfo == null) {
                return toWrap;
            }
            final MethodInfo methodInfo = testMethodInfo;
            return new MethodVisitor(Opcodes.ASM4, toWrap) {
                @Override
                public AnnotationVisitor visitAnnotation(final String desc, final boolean visible) {
                    final AnnotationVisitor toWrap = super.visitAnnotation(desc, visible);
                    return visible ? toWrap : new TopLevelAnnotationInflater(desc, toWrap, methodInfo);
                }
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    @Override
    protected void createSerialisation(ClassWriter cw, String proxyClassFileName, Class<?> classToProxy, String classFileName)
    {
        String[] exceptionTypeNames = {Type.getType(ObjectStreamException.class).getInternalName()};
        MethodVisitor mv = cw.visitMethod(Modifier.PUBLIC, "writeReplace", "()Ljava/lang/Object;", null, exceptionTypeNames);

        // fill method body
        mv.visitCode();

        // load the contextual instance Provider
        mv.visitVarInsn(Opcodes.ALOAD, 0);
        mv.visitFieldInsn(Opcodes.GETFIELD, proxyClassFileName, FIELD_INSTANCE_PROVIDER, Type.getDescriptor(Provider.class));

        mv.visitInsn(Opcodes.ARETURN);

        mv.visitMaxs(-1, -1);
        mv.visitEnd();
    }
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                parentClassFileName = classFileName;
                superDefaultCt = classToProxy.getDeclaredConstructor(null);
            }

            final String descriptor = Type.getConstructorDescriptor(superDefaultCt);
            final MethodVisitor mv = cw.visitMethod(Opcodes.ACC_PUBLIC, "<init>", descriptor, null, null);
            mv.visitCode();
            mv.visitVarInsn(Opcodes.ALOAD, 0);
            mv.visitMethodInsn(Opcodes.INVOKESPECIAL, parentClassFileName, "<init>", descriptor);

            // the instance provider field
            mv.visitVarInsn(Opcodes.ALOAD, 0);
            mv.visitInsn(Opcodes.ACONST_NULL);
            mv.visitFieldInsn(Opcodes.PUTFIELD, proxyClassFileName, FIELD_INSTANCE_PROVIDER, Type.getDescriptor(Provider.class));

            mv.visitInsn(Opcodes.RETURN);
            mv.visitMaxs(-1, -1);
            mv.visitEnd();
        }
        catch (NoSuchMethodException e)
        {
            throw new ProxyGenerationException(e);
        }
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                exceptionTypeNames[i] = Type.getType(exceptionTypes[i]).getInternalName();
            }

            int targetModifiers = delegatedMethod.getModifiers() & (Modifier.PROTECTED | Modifier.PUBLIC);

            MethodVisitor mv = cw.visitMethod(targetModifiers, delegatedMethod.getName(), methodDescriptor, null, exceptionTypeNames);

            // fill method body
            mv.visitCode();

            // load the contextual instance Provider
            mv.visitVarInsn(Opcodes.ALOAD, 0);
            mv.visitFieldInsn(Opcodes.GETFIELD, proxyClassFileName, FIELD_INSTANCE_PROVIDER, Type.getDescriptor(Provider.class));

            // invoke the get() method on the Provider
            mv.visitMethodInsn(Opcodes.INVOKEINTERFACE, Type.getInternalName(Provider.class), "get", "()Ljava/lang/Object;");

            // and convert the Object to the target class type
            mv.visitTypeInsn(Opcodes.CHECKCAST, Type.getInternalName(classToProxy));


            // now calculate the parameters
            int offset = 1;
            for (Class<?> aClass : delegatedMethod.getParameterTypes())
            {
                final Type type = Type.getType(aClass);
                mv.visitVarInsn(type.getOpcode(Opcodes.ILOAD), offset);
                offset += type.getSize();
            }

            // and finally invoke the target method on the provided Contextual Instance
            final Type declaringClass = Type.getType(delegatedMethod.getDeclaringClass());
            boolean interfaceMethod = Modifier.isInterface(delegatedMethod.getDeclaringClass().getModifiers());
            mv.visitMethodInsn(interfaceMethod ? Opcodes.INVOKEINTERFACE : Opcodes.INVOKEVIRTUAL,
                               declaringClass.getInternalName(), delegatedMethod.getName(), methodDescriptor);

            generateReturn(mv, delegatedMethod);

            mv.visitMaxs(-1, -1);

            mv.visitEnd();
        }

    }
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