Package org.apache.xbean.asm4.signature

Examples of org.apache.xbean.asm4.signature.SignatureReader


        // EntityBean and Cmp2Entity.
        cw.visit(V1_5, ACC_PUBLIC + ACC_SUPER, implClassName, null, beanClassName, new String[]{"org/apache/openejb/core/cmp/cmp2/Cmp2Entity", "javax/ejb/EntityBean"});

        // public static Object deploymentInfo;
        {
            FieldVisitor fv = cw.visitField(ACC_PUBLIC + ACC_STATIC, "deploymentInfo", "Ljava/lang/Object;", null, null);
            fv.visitEnd();
        }

        // private transient boolean deleted;
        {
            FieldVisitor fv = cw.visitField(ACC_PRIVATE + ACC_TRANSIENT, DELETED, "Z", null, null);
            fv.visitEnd();
        }

        if (Object.class.equals(primKeyClass)) {
            FieldVisitor fv = cw.visitField(ACC_PRIVATE, UNKNOWN_PK_NAME, UNKNOWN_PK_TYPE.getDescriptor(), null, null);
            fv.visitEnd();
        }

        // Generate the set of cmp fields as private attributes.
        // private ${cmpField.type} ${cmpField.name};
        for (CmpField cmpField : cmpFields.values()) {
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     * with private scope.
     *
     * @param cmpField The Cmp field defined in the metadata.
     */
    private void createField(CmpField cmpField) {
        FieldVisitor fv = cw.visitField(ACC_PRIVATE,
                cmpField.getName(),
                cmpField.getDescriptor(),
                null,
                null);
        fv.visitEnd();
    }
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     * of the field name.
     *
     * @param cmrField The CMR field descriptor.
     */
    private void createCmrFields(CmrField cmrField) {
        FieldVisitor fv = cw.visitField(ACC_PRIVATE,
                cmrField.getName(),
                cmrField.getDescriptor(),
                cmrField.getGenericSignature(),
                null);
        fv.visitEnd();

        fv = cw.visitField(ACC_PRIVATE + ACC_TRANSIENT,
                cmrField.getName() + "Cmr",
                cmrField.getAccessorDescriptor(),
                cmrField.getAccessorGenericSignature(),
                null);
        fv.visitEnd();
    }
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        cw.visit(V1_5, ACC_PUBLIC + ACC_SUPER, implClassName, null, beanClassName, new String[]{"javax/ejb/EntityBean"});

        // if we have an unknown pk, we need to add a field for the pk
        if (unknownPk) {
            // public Long OpenEJB_pk;
            FieldVisitor fv = cw.visitField(ACC_PUBLIC, "OpenEJB_pk", "Ljava/lang/Long;", null, null);
            fv.visitEnd();
        }

        // there's not much to generate here.  We create a default constructor, then generate the
        // post create methods.  A lot of the work is done by having mapped superclass information that
        // we pass to the JPA engine.
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        MethodVisitor mv = cw.visitMethod(modifier, method.getName(), Type.getMethodDescriptor(method), null, null);
        mv.visitCode();

        // push try/catch block, to catch declared exceptions, and to catch java.lang.Throwable
        final Label l0 = new Label();
        final Label l1 = new Label();
        final Label l2 = new Label();

        if (exceptionTypes.length > 0)
        {
            mv.visitTryCatchBlock(l0, l1, l2, "java/lang/reflect/InvocationTargetException");
        }

        // push try code
        mv.visitLabel(l0);
        final String classNameToOverride = method.getDeclaringClass().getName().replace('.', '/');
        mv.visitLdcInsn(Type.getType("L" + classNameToOverride + ";"));

        // the following code generates the bytecode for this line of Java:
        // Method method = <proxy>.class.getMethod("add", new Class[] { <array of function argument classes> });

        // get the method name to invoke, and push to stack
        mv.visitLdcInsn(method.getName());

        // create the Class[]
        createArrayDefinition(mv, parameterTypes.length, Class.class);

        int length = 1;

        // push parameters into array
        for (int i = 0; i < parameterTypes.length; i++)
        {
            // keep copy of array on stack
            mv.visitInsn(Opcodes.DUP);

            final Class<?> parameterType = parameterTypes[i];

            // push number onto stack
            pushIntOntoStack(mv, i);

            if (parameterType.isPrimitive())
            {
                String wrapperType = getWrapperType(parameterType);
                mv.visitFieldInsn(Opcodes.GETSTATIC, wrapperType, "TYPE", "Ljava/lang/Class;");
            }
            else
            {
                mv.visitLdcInsn(Type.getType(parameterType));
            }

            mv.visitInsn(Opcodes.AASTORE);

            if (Long.TYPE.equals(parameterType) || Double.TYPE.equals(parameterType))
            {
                length += 2;
            }
            else
            {
                length++;
            }
        }

        // the following code generates bytecode equivalent to:
        // return ((<returntype>) invocationHandler.invoke(this, {methodIndex}, new Object[] { <function arguments }))[.<primitive>Value()];

        final Label l4 = new Label();
        mv.visitLabel(l4);

        mv.visitVarInsn(Opcodes.ALOAD, 0);

        // get the invocationHandler field from this class
        mv.visitFieldInsn(Opcodes.GETFIELD, proxyClassFileName, FIELD_INTERCEPTOR_HANDLER, Type.getDescriptor(InterceptorHandler.class));

        // add the Method from the static array as first parameter
        mv.visitFieldInsn(Opcodes.GETSTATIC, proxyClassFileName, FIELD_INTERCEPTED_METHODS, Type.getDescriptor(Method[].class));

        // push the methodIndex of the current method
        mv.visitIntInsn(Opcodes.BIPUSH, methodIndex);

        // and now load the Method from the array
        mv.visitInsn(Opcodes.AALOAD);


        // prepare the parameter array as Object[] and store it on the stack
        pushMethodParameterArray(mv, parameterTypes);


        // invoke the invocationHandler
        mv.visitMethodInsn(Opcodes.INVOKEINTERFACE, Type.getInternalName(InterceptorHandler.class), "invoke",
                "(Ljava/lang/reflect/Method;[Ljava/lang/Object;)Ljava/lang/Object;");

        // cast the result
        mv.visitTypeInsn(Opcodes.CHECKCAST, getCastType(returnType));

        if (returnType.isPrimitive() && (!Void.TYPE.equals(returnType)))
        {
            // get the primitive value
            mv.visitMethodInsn(Opcodes.INVOKEVIRTUAL, getWrapperType(returnType), getPrimitiveMethod(returnType),
                    "()" + Type.getDescriptor(returnType));
        }

        // push return
        mv.visitLabel(l1);
        if (!Void.TYPE.equals(returnType))
        {
            mv.visitInsn(getReturnInsn(returnType));
        }
        else
        {
            mv.visitInsn(Opcodes.POP);
            mv.visitInsn(Opcodes.RETURN);
        }

        // catch InvocationTargetException
        if (exceptionTypes.length > 0)
        {
            mv.visitLabel(l2);
            mv.visitVarInsn(Opcodes.ASTORE, length);

            final Label l5 = new Label();
            mv.visitLabel(l5);

            for (int i = 0; i < exceptionTypes.length; i++)
            {
                final Class<?> exceptionType = exceptionTypes[i];

                mv.visitLdcInsn(Type.getType("L" + exceptionType.getCanonicalName().replace('.', '/') + ";"));
                mv.visitVarInsn(Opcodes.ALOAD, length);
                mv.visitMethodInsn(Opcodes.INVOKEVIRTUAL, "java/lang/reflect/InvocationTargetException", "getCause",
                        "()Ljava/lang/Throwable;");
                mv.visitMethodInsn(Opcodes.INVOKEVIRTUAL, "java/lang/Object", "getClass", "()Ljava/lang/Class;");
                mv.visitMethodInsn(Opcodes.INVOKEVIRTUAL, "java/lang/Object", "equals", "(Ljava/lang/Object;)Z");

                final Label l6 = new Label();
                mv.visitJumpInsn(Opcodes.IFEQ, l6);

                final Label l7 = new Label();
                mv.visitLabel(l7);

                mv.visitVarInsn(Opcodes.ALOAD, length);
                mv.visitMethodInsn(Opcodes.INVOKEVIRTUAL, "java/lang/reflect/InvocationTargetException", "getCause",
                        "()Ljava/lang/Throwable;");
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        final MethodVisitor mv = cw.visitMethod(modifier, method.getName(), getMethodSignatureAsString(returnType, parameterTypes), null, null);
        mv.visitCode();

        // push try/catch block, to catch declared exceptions, and to catch java.lang.Throwable
        final Label l0 = new Label();
        final Label l1 = new Label();
        final Label l2 = new Label();

        if (exceptionTypes.length > 0) {
            mv.visitTryCatchBlock(l0, l1, l2, "java/lang/reflect/InvocationTargetException");
        }

        // push try code
        mv.visitLabel(l0);
        final String classNameToOverride = method.getDeclaringClass().getName().replace('.', '/');
        mv.visitLdcInsn(Type.getType("L" + classNameToOverride + ";"));

        // the following code generates the bytecode for this line of Java:
        // Method method = <proxy>.class.getMethod("add", new Class[] { <array of function argument classes> });

        // get the method name to invoke, and push to stack
        mv.visitLdcInsn(method.getName());

        // create the Class[]
        createArrayDefinition(mv, parameterTypes.length, Class.class);

        int length = 1;

        // push parameters into array
        for (int i = 0; i < parameterTypes.length; i++) {
            // keep copy of array on stack
            mv.visitInsn(DUP);

            final Class<?> parameterType = parameterTypes[i];

            // push number onto stack
            pushIntOntoStack(mv, i);

            if (parameterType.isPrimitive()) {
                final String wrapperType = getWrapperType(parameterType);
                mv.visitFieldInsn(GETSTATIC, wrapperType, "TYPE", "Ljava/lang/Class;");
            } else {
                mv.visitLdcInsn(Type.getType(getAsmTypeAsString(parameterType, true)));
            }

            mv.visitInsn(AASTORE);

            if (Long.TYPE.equals(parameterType) || Double.TYPE.equals(parameterType)) {
                length += 2;
            } else {
                length++;
            }
        }

        // invoke getMethod() with the method name and the array of types
        mv.visitMethodInsn(INVOKEVIRTUAL, "java/lang/Class", "getDeclaredMethod", "(Ljava/lang/String;[Ljava/lang/Class;)Ljava/lang/reflect/Method;");

        // store the returned method for later
        mv.visitVarInsn(ASTORE, length);

        // the following code generates bytecode equivalent to:
        // return ((<returntype>) invocationHandler.invoke(this, method, new Object[] { <function arguments }))[.<primitive>Value()];

        final Label l4 = new Label();
        mv.visitLabel(l4);
        mv.visitVarInsn(ALOAD, 0);

        // get the invocationHandler field from this class
        mv.visitFieldInsn(GETFIELD, proxyName, handlerName, "Ljava/lang/reflect/InvocationHandler;");

        // we want to pass "this" in as the first parameter
        mv.visitVarInsn(ALOAD, 0);

        // and the method we fetched earlier
        mv.visitVarInsn(ALOAD, length);

        // need to construct the array of objects passed in

        // create the Object[]
        createArrayDefinition(mv, parameterTypes.length, Object.class);

        int index = 1;
        // push parameters into array
        for (int i = 0; i < parameterTypes.length; i++) {
            // keep copy of array on stack
            mv.visitInsn(DUP);

            final Class<?> parameterType = parameterTypes[i];

            // push number onto stack
            pushIntOntoStack(mv, i);

            if (parameterType.isPrimitive()) {
                final String wrapperType = getWrapperType(parameterType);
                mv.visitVarInsn(getVarInsn(parameterType), index);

                mv.visitMethodInsn(INVOKESTATIC, wrapperType, "valueOf", "(" + getPrimitiveLetter(parameterType) + ")L" + wrapperType + ";");
                mv.visitInsn(AASTORE);

                if (Long.TYPE.equals(parameterType) || Double.TYPE.equals(parameterType)) {
                    index += 2;
                } else {
                    index++;
                }
            } else {
                mv.visitVarInsn(ALOAD, index);
                mv.visitInsn(AASTORE);
                index++;
            }
        }

        // invoke the invocationHandler
        mv.visitMethodInsn(INVOKEINTERFACE, "java/lang/reflect/InvocationHandler", "invoke", "(Ljava/lang/Object;Ljava/lang/reflect/Method;[Ljava/lang/Object;)Ljava/lang/Object;");

        // cast the result
        mv.visitTypeInsn(CHECKCAST, getCastType(returnType));

        if (returnType.isPrimitive() && (!Void.TYPE.equals(returnType))) {
            // get the primitive value
            mv.visitMethodInsn(INVOKEVIRTUAL, getWrapperType(returnType), getPrimitiveMethod(returnType), "()" + getPrimitiveLetter(returnType));
        }

        // push return
        mv.visitLabel(l1);
        if (!Void.TYPE.equals(returnType)) {
            mv.visitInsn(getReturnInsn(returnType));
        } else {
            mv.visitInsn(POP);
            mv.visitInsn(RETURN);
        }

        // catch InvocationTargetException
        if (exceptionTypes.length > 0) {
            mv.visitLabel(l2);
            mv.visitVarInsn(ASTORE, length);

            final Label l5 = new Label();
            mv.visitLabel(l5);

            for (int i = 0; i < exceptionTypes.length; i++) {
                final Class<?> exceptionType = exceptionTypes[i];

                mv.visitLdcInsn(Type.getType("L" + exceptionType.getName().replace('.', '/') + ";"));
                mv.visitVarInsn(ALOAD, length);
                mv.visitMethodInsn(INVOKEVIRTUAL, "java/lang/reflect/InvocationTargetException", "getCause", "()Ljava/lang/Throwable;");
                mv.visitMethodInsn(INVOKEVIRTUAL, "java/lang/Object", "getClass", "()Ljava/lang/Class;");
                mv.visitMethodInsn(INVOKEVIRTUAL, "java/lang/Object", "equals", "(Ljava/lang/Object;)Z");

                final Label l6 = new Label();
                mv.visitJumpInsn(IFEQ, l6);

                final Label l7 = new Label();
                mv.visitLabel(l7);

                mv.visitVarInsn(ALOAD, length);
                mv.visitMethodInsn(INVOKEVIRTUAL, "java/lang/reflect/InvocationTargetException", "getCause", "()Ljava/lang/Throwable;");
                mv.visitTypeInsn(CHECKCAST, exceptionType.getName().replace('.', '/'));
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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);

        // 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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