Package org.apache.xbean.asm5

Examples of org.apache.xbean.asm5.ClassWriter

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    private byte[] generateProxy(ClassLoader classLoader, Class<?> classToProxy, String proxyClassName, String proxyClassFileName,
                                 Method[] interceptedMethods, Method[] nonInterceptedMethods)
            throws ProxyGenerationException
    {
        ClassWriter cw = new ClassWriter(ClassWriter.COMPUTE_MAXS);
        String classFileName = classToProxy.getName().replace('.', '/');

        String[] interfaceNames = new String[]{Type.getInternalName(getMarkerInterface())};
        String superClassName = classFileName;

        if (classToProxy.isInterface())
        {
            interfaceNames = new String[]{Type.getInternalName(classToProxy), interfaceNames[0]};
            superClassName = Type.getInternalName(Object.class);
        }

        cw.visit(Opcodes.V1_5, Opcodes.ACC_PUBLIC + Opcodes.ACC_SUPER + Opcodes.ACC_SYNTHETIC, proxyClassFileName, null, superClassName, interfaceNames);
        cw.visitSource(classFileName + ".java", null);

        createInstanceVariables(cw, classToProxy, classFileName);
        createSerialisation(cw, proxyClassFileName, classToProxy, classFileName);



        // create a static String Field which contains the passivationId of the Bean or null if not PassivationCapable
        cw.visitField(Opcodes.ACC_PRIVATE | Opcodes.ACC_STATIC,
                FIELD_BEAN_PASSIVATION_ID, Type.getDescriptor(String.class), null, null).visitEnd();

        createConstructor(cw, proxyClassFileName, classToProxy, classFileName);


        if (nonInterceptedMethods != null)
        {
            delegateNonInterceptedMethods(classLoader, cw, proxyClassFileName, classToProxy, nonInterceptedMethods);
        }

        if (interceptedMethods != null)
        {
            delegateInterceptedMethods(classLoader, cw, proxyClassFileName, classToProxy, interceptedMethods);
        }

        return cw.toByteArray();
    }
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    public static Class createProxy(final Class<?> classToProxy, final ClassLoader cl, final Class... interfaces) {
        return createProxy(classToProxy, cl, classToProxy.getName() + "$$LocalBeanProxy", interfaces);
    }

    public static byte[] generateProxy(final Class<?> classToProxy, final String proxyName, final Class<?>... interfaces) throws ProxyGenerationException {
        final ClassWriter cw = new ClassWriter(ClassWriter.COMPUTE_FRAMES);

        final String proxyClassFileName = proxyName.replace('.', '/');
        final String classFileName = classToProxy.getName().replace('.', '/');

        // push class signature
        final String[] interfaceNames = new String[interfaces.length];
        for (int i = 0; i < interfaces.length; i++) {
            final Class<?> anInterface = interfaces[i];
            interfaceNames[i] = anInterface.getName().replace('.', '/');
        }

        cw.visit(V1_5, ACC_PUBLIC + ACC_SUPER, proxyClassFileName, null, classFileName, interfaceNames);
        cw.visitSource(classFileName + ".java", null);

        cw.visitAnnotation("L" + Proxy.class.getName().replace('.', '/') + ";", true).visitEnd();

        // push InvocationHandler fields
        cw.visitField(ACC_FINAL + ACC_PRIVATE, BUSSINESS_HANDLER_NAME, "Ljava/lang/reflect/InvocationHandler;", null, null).visitEnd();
        cw.visitField(ACC_FINAL + ACC_PRIVATE, NON_BUSINESS_HANDLER_NAME, "Ljava/lang/reflect/InvocationHandler;", null, null).visitEnd();

        final Map<String, List<Method>> methodMap = new HashMap<String, List<Method>>();

        getNonPrivateMethods(classToProxy, methodMap);

        for (final Class<?> anInterface : interfaces) {
            getNonPrivateMethods(anInterface, methodMap);
        }

        // Iterate over the public methods
        for (final Map.Entry<String, List<Method>> entry : methodMap.entrySet()) {

            for (final Method method : entry.getValue()) {
                final String name = method.getName();

                if (Modifier.isPublic(method.getModifiers())
                    || method.getParameterTypes().length == 0 && ("finalize".equals(name)
                    || "clone".equals(name))) {
                    // forward invocations of any public methods or
                    // finalize/clone methods to businessHandler
                    processMethod(cw, method, proxyClassFileName, BUSSINESS_HANDLER_NAME);
                } else {
                    // forward invocations of any other methods to nonBusinessHandler
                    processMethod(cw, method, proxyClassFileName, NON_BUSINESS_HANDLER_NAME);
                }
            }
        }

        return cw.toByteArray();
    }
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    private static byte[] generateBytes(final Class<?> classToProxy) throws ProxyGenerationException {

        final Map<String, MethodVisitor> visitors = new HashMap<>();

        final ClassWriter cw = new ClassWriter(ClassWriter.COMPUTE_FRAMES);

        final String proxyClassFileName = getSubclassName(classToProxy).replace('.', '/');
        final String classFileName = classToProxy.getName().replace('.', '/');

        cw.visit(V1_5, ACC_PUBLIC + ACC_SUPER, proxyClassFileName, null, classFileName, null);
        cw.visitSource(classFileName + ".java", null);


        // push InvocationHandler field
        cw.visitField(ACC_FINAL + ACC_PRIVATE, "this$handler", "Ljava/lang/reflect/InvocationHandler;", null, null).visitEnd();

        for (final Constructor<?> constructor : classToProxy.getConstructors()) {
            if (!Modifier.isPublic(constructor.getModifiers())) {
                continue;
            }

            final MethodVisitor mv = visitConstructor(cw, proxyClassFileName, classFileName, constructor);
            visitors.put("<init>" + Type.getConstructorDescriptor(constructor), mv);
        }

        final Map<String, List<Method>> methodMap = new HashMap<>();

        getNonPrivateMethods(classToProxy, methodMap);

        // Iterate over the public methods
        for (final Map.Entry<String, List<Method>> entry : methodMap.entrySet()) {

            for (final Method method : entry.getValue()) {
                if (Modifier.isAbstract(method.getModifiers())) {
                    final MethodVisitor visitor = LocalBeanProxyFactory.visit(cw, method, proxyClassFileName, "this$handler");
                    visitors.put(method.getName() + Type.getMethodDescriptor(method), visitor);
                }
            }
        }

        copyClassAnnotations(classToProxy, cw);

        copyMethodAnnotations(classToProxy, visitors);

        // This should never be reached, but just in case
        for (final MethodVisitor visitor : visitors.values()) {
            visitor.visitEnd();
        }

        return cw.toByteArray();
    }
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    private byte[] generateProxy(ClassLoader classLoader, Class<?> classToProxy, String proxyClassName, String proxyClassFileName,
                                 Method[] interceptedMethods, Method[] nonInterceptedMethods)
            throws ProxyGenerationException
    {
        ClassWriter cw = new ClassWriter(ClassWriter.COMPUTE_MAXS);
        String classFileName = classToProxy.getName().replace('.', '/');

        String[] interfaceNames = new String[]{Type.getInternalName(getMarkerInterface())};
        String superClassName = classFileName;

        if (classToProxy.isInterface())
        {
            interfaceNames = new String[]{Type.getInternalName(classToProxy), interfaceNames[0]};
            superClassName = Type.getInternalName(Object.class);
        }

        cw.visit(Opcodes.V1_5, Opcodes.ACC_PUBLIC + Opcodes.ACC_SUPER + Opcodes.ACC_SYNTHETIC, proxyClassFileName, null, superClassName, interfaceNames);
        cw.visitSource(classFileName + ".java", null);

        createInstanceVariables(cw, classToProxy, classFileName);
        createSerialisation(cw, proxyClassFileName, classToProxy, classFileName);



        // create a static String Field which contains the passivationId of the Bean or null if not PassivationCapable
        cw.visitField(Opcodes.ACC_PRIVATE | Opcodes.ACC_STATIC,
                FIELD_BEAN_PASSIVATION_ID, Type.getDescriptor(String.class), null, null).visitEnd();

        createConstructor(cw, proxyClassFileName, classToProxy, classFileName);


        if (nonInterceptedMethods != null)
        {
            delegateNonInterceptedMethods(classLoader, cw, proxyClassFileName, classToProxy, nonInterceptedMethods);
        }

        if (interceptedMethods != null)
        {
            delegateInterceptedMethods(classLoader, cw, proxyClassFileName, classToProxy, interceptedMethods);
        }

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

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

        if (Object.class.equals(primKeyClass)) {
            final 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 (final CmpField cmpField : cmpFields.values()) {
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     * with private scope.
     *
     * @param cmpField The Cmp field defined in the metadata.
     */
    private void createField(final CmpField cmpField) {
        final 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(final 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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        // 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;
        {
            final FieldVisitor fv = cw.visitField(ACC_PUBLIC + ACC_STATIC, "deploymentInfo", "Ljava/lang/Object;", null, null);
            fv.visitEnd();
        }

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

        if (Object.class.equals(primKeyClass)) {
            final 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 (final CmpField cmpField : cmpFields.values()) {
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     * with private scope.
     *
     * @param cmpField The Cmp field defined in the metadata.
     */
    private void createField(final CmpField cmpField) {
        final FieldVisitor fv = cw.visitField(ACC_PRIVATE,
            cmpField.getName(),
            cmpField.getDescriptor(),
            null,
            null);
        fv.visitEnd();
    }
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