Examples with ClassWriter org.apache.xbean.asm6.ClassWriter used on opensource projects

Example 16 with ClassWriter

use of org.apache.xbean.asm6.ClassWriter in project tomee by apache.

the class DynamicSubclass method generateBytes.

private static byte[] generateBytes(final Class<?> classToProxy, final boolean proxyNonAbstractMethods) 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$handler", "Ljava/lang/reflect/InvocationHandler;", null, null).visitEnd();
    for (final Constructor<?> constructor : classToProxy.getConstructors()) {
        if (!Modifier.isPublic(constructor.getModifiers())) {
            continue;
        }
        final MethodVisitor mv = visitConstructor(cw, proxyClassFileName, classFileName, constructor);
        visitors.put("<init>" + Type.getConstructorDescriptor(constructor), mv);
    }
    final Map<String, List<Method>> methodMap = new HashMap<>();
    getNonPrivateMethods(classToProxy, methodMap);
    // Iterate over the public methods
    for (final Map.Entry<String, List<Method>> entry : methodMap.entrySet()) {
        for (final Method method : entry.getValue()) {
            if (Modifier.isAbstract(method.getModifiers()) || (proxyNonAbstractMethods && Modifier.isPublic(method.getModifiers()))) {
                final MethodVisitor visitor = LocalBeanProxyFactory.visit(cw, method, proxyClassFileName, "this$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();
}

Example 17 with ClassWriter

use of org.apache.xbean.asm6.ClassWriter in project tomee by apache.

the class MakeTxLookup method createHibernteStrategy.

private static void createHibernteStrategy(final File baseDir) throws Exception {
    final String factory = HIBERNATE_FACTORY;
    final String classFilePath = factory.replace('.', '/');
    final String sourceFileName = factory.substring(factory.lastIndexOf('.') + 1, factory.length()) + ".java";
    final ClassWriter cw = new ClassWriter(0);
    MethodVisitor mv;
    cw.visit(V1_5, ACC_PUBLIC + ACC_SUPER, classFilePath, null, "java/lang/Object", new String[] { "org/hibernate/transaction/TransactionManagerLookup" });
    cw.visitSource(sourceFileName, null);
    {
        mv = cw.visitMethod(ACC_PUBLIC, "<init>", "()V", null, null);
        mv.visitCode();
        mv.visitVarInsn(ALOAD, 0);
        mv.visitMethodInsn(INVOKESPECIAL, "java/lang/Object", "<init>", "()V", false);
        mv.visitInsn(RETURN);
        mv.visitMaxs(1, 1);
        mv.visitEnd();
    }
    {
        mv = cw.visitMethod(ACC_PUBLIC, "getTransactionManager", "(Ljava/util/Properties;)Ljavax/transaction/TransactionManager;", null, new String[] { "org/hibernate/HibernateException" });
        mv.visitCode();
        mv.visitMethodInsn(INVOKESTATIC, "org/apache/openejb/OpenEJB", "getTransactionManager", "()Ljavax/transaction/TransactionManager;", false);
        mv.visitInsn(ARETURN);
        mv.visitMaxs(1, 2);
        mv.visitEnd();
    }
    {
        mv = cw.visitMethod(ACC_PUBLIC, "getUserTransactionName", "()Ljava/lang/String;", null, null);
        mv.visitCode();
        mv.visitLdcInsn("java:comp/UserTransaction");
        mv.visitInsn(ARETURN);
        mv.visitMaxs(1, 1);
        mv.visitEnd();
    }
    {
        mv = cw.visitMethod(ACC_PUBLIC, "getTransactionIdentifier", "(Ljavax/transaction/Transaction;)Ljava/lang/Object;", null, null);
        mv.visitCode();
        mv.visitVarInsn(ALOAD, 1);
        mv.visitInsn(ARETURN);
        mv.visitMaxs(1, 2);
        mv.visitEnd();
    }
    cw.visitEnd();
    write(baseDir, cw, classFilePath);
}

Example 18 with ClassWriter

use of org.apache.xbean.asm6.ClassWriter in project tomee by apache.

the class MakeTxLookup method createTopLinkStrategy.

private static void createTopLinkStrategy(final File baseDir) throws Exception {
    final String factory = TOPLINK_FACTORY;
    final String classFilePath = factory.replace('.', '/');
    final String sourceFileName = factory.substring(factory.lastIndexOf('.') + 1, factory.length()) + ".java";
    final ClassWriter cw = new ClassWriter(0);
    MethodVisitor mv;
    cw.visit(V1_5, ACC_PUBLIC + ACC_SUPER, classFilePath, null, "oracle/toplink/essentials/transaction/JTATransactionController", null);
    cw.visitSource(sourceFileName, null);
    {
        mv = cw.visitMethod(ACC_PUBLIC, "<init>", "()V", null, null);
        mv.visitCode();
        mv.visitVarInsn(ALOAD, 0);
        mv.visitMethodInsn(INVOKESPECIAL, "oracle/toplink/essentials/transaction/JTATransactionController", "<init>", "()V", false);
        mv.visitInsn(RETURN);
        mv.visitMaxs(1, 1);
        mv.visitEnd();
    }
    {
        mv = cw.visitMethod(ACC_PROTECTED, "acquireTransactionManager", "()Ljavax/transaction/TransactionManager;", null, new String[] { "java/lang/Exception" });
        mv.visitCode();
        mv.visitMethodInsn(INVOKESTATIC, "org/apache/openejb/OpenEJB", "getTransactionManager", "()Ljavax/transaction/TransactionManager;", false);
        mv.visitInsn(ARETURN);
        mv.visitMaxs(1, 1);
        mv.visitEnd();
    }
    cw.visitEnd();
    write(baseDir, cw, classFilePath);
}

Example 19 with ClassWriter

use of org.apache.xbean.asm6.ClassWriter in project component-runtime by Talend.

the class ProxyGenerator method createSerialisation.

private void createSerialisation(final ClassWriter cw, final String pluginId, final String key) {
    final MethodVisitor mv = cw.visitMethod(Modifier.PUBLIC, "writeReplace", "()Ljava/lang/Object;", null, new String[] { Type.getType(ObjectStreamException.class).getInternalName() });
    mv.visitCode();
    mv.visitTypeInsn(NEW, "org/talend/sdk/component/runtime/serialization/SerializableService");
    mv.visitInsn(DUP);
    mv.visitLdcInsn(pluginId);
    mv.visitLdcInsn(key);
    mv.visitMethodInsn(INVOKESPECIAL, "org/talend/sdk/component/runtime/serialization/SerializableService", "<init>", "(Ljava/lang/String;Ljava/lang/String;)V", false);
    mv.visitInsn(ARETURN);
    mv.visitMaxs(-1, -1);
    mv.visitEnd();
}

Example 20 with ClassWriter

use of org.apache.xbean.asm6.ClassWriter in project component-runtime by Talend.

the class PluginGenerator method createService.

private byte[] createService(final JarOutputStream outputStream, final String packageName, final String name) throws IOException {
    final String className = packageName + "/AService.class";
    outputStream.putNextEntry(new ZipEntry(className));
    final ClassWriter writer = new ClassWriter(COMPUTE_FRAMES);
    writer.visitAnnotation(Type.getDescriptor(Service.class), true).visitEnd();
    writer.visit(V1_8, ACC_PUBLIC + ACC_SUPER, className.substring(0, className.length() - ".class".length()), null, Type.getInternalName(Object.class), null);
    writer.visitSource(className.replace(".class", ".java"), null);
    addConstructor(writer);
    final MethodVisitor action = writer.visitMethod(ACC_PUBLIC, "doAction", "(L" + packageName + "/AModel;)L" + packageName + "/AModel;", null, new String[0]);
    final AnnotationVisitor actionAnnotation = action.visitAnnotation(Type.getDescriptor(Action.class), true);
    actionAnnotation.visit("family", "proc");
    actionAnnotation.visit("value", name + "Action");
    actionAnnotation.visitEnd();
    action.visitCode();
    action.visitTypeInsn(NEW, packageName + "/AModel");
    action.visitInsn(DUP);
    action.visitMethodInsn(INVOKESPECIAL, packageName + "/AModel", "<init>", "()V", false);
    action.visitInsn(ARETURN);
    action.visitInsn(ARETURN);
    action.visitMaxs(1, 1);
    action.visitEnd();
    writer.visitEnd();
    return writer.toByteArray();
}