Examples with ClassWriter jodd.asm5.ClassWriter used on opensource projects

Example 16 with ClassWriter

use of jodd.asm5.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 jodd.asm5.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 jodd.asm5.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 jodd.asm5.ClassWriter in project component-runtime by Talend.

the class PluginGenerator method createProcessor.

public byte[] createProcessor(final JarOutputStream outputStream, final String packageName, final String name) throws IOException {
    final String className = packageName + "/AProcessor.class";
    outputStream.putNextEntry(new ZipEntry(className));
    final ClassWriter writer = new ClassWriter(COMPUTE_FRAMES);
    final AnnotationVisitor processorAnnotation = writer.visitAnnotation(Type.getDescriptor(Processor.class), true);
    processorAnnotation.visit("family", "comp");
    processorAnnotation.visit("name", name);
    processorAnnotation.visitEnd();
    writer.visit(V1_8, ACC_PUBLIC + ACC_SUPER, className.substring(0, className.length() - ".class".length()), null, Type.getInternalName(Object.class), new String[] { Serializable.class.getName().replace(".", "/") });
    writer.visitSource(className.replace(".class", ".java"), null);
    addConstructor(writer);
    // generate a processor
    final MethodVisitor emitMethod = writer.visitMethod(ACC_PUBLIC, "emit", "(L" + packageName + "/AModel;)L" + packageName + "/AModel;", null, new String[0]);
    emitMethod.visitAnnotation(Type.getDescriptor(ElementListener.class), true).visitEnd();
    emitMethod.visitCode();
    emitMethod.visitTypeInsn(NEW, packageName + "/AModel");
    emitMethod.visitInsn(DUP);
    emitMethod.visitMethodInsn(INVOKESPECIAL, packageName + "/AModel", "<init>", "()V", false);
    emitMethod.visitInsn(ARETURN);
    emitMethod.visitInsn(ARETURN);
    emitMethod.visitMaxs(1, 1);
    emitMethod.visitEnd();
    writer.visitEnd();
    return writer.toByteArray();
}

Example 20 with ClassWriter

use of jodd.asm5.ClassWriter in project component-runtime by Talend.

the class PluginGenerator method createChainPlugin.

public File createChainPlugin(final File dir, final String plugin, final int maxBatchSize) {
    final File target = new File(dir, plugin);
    try (final JarOutputStream outputStream = new JarOutputStream(new FileOutputStream(target))) {
        final String packageName = toPackage(target.getParentFile().getParentFile().getName()).replace(".", "/");
        final String sourcePackage = "org/talend/test";
        final String fromPack = sourcePackage.replace('/', '.');
        final String toPack = packageName.replace('.', '/');
        final File root = new File(jarLocation(getClass()), sourcePackage);
        ofNullable(root.listFiles()).map(Stream::of).orElseGet(Stream::empty).filter(c -> c.getName().endsWith(".class")).forEach(clazz -> {
            try (final InputStream is = new FileInputStream(clazz)) {
                final ClassReader reader = new ClassReader(is);
                final ClassWriter writer = new ClassWriter(COMPUTE_FRAMES);
                reader.accept(new ClassRemapper(writer, new Remapper() {

                    @Override
                    public String map(final String key) {
                        return key.replace(sourcePackage, toPack).replace(fromPack, packageName);
                    }
                }), EXPAND_FRAMES);
                outputStream.putNextEntry(new JarEntry(toPack + '/' + clazz.getName()));
                outputStream.write(writer.toByteArray());
                outputStream.closeEntry();
            } catch (final IOException e) {
                fail(e.getMessage());
            }
        });
        outputStream.putNextEntry(new JarEntry("TALEND-INF/local-configuration.properties"));
        outputStream.write(("_maxBatchSize.value=" + maxBatchSize).getBytes(StandardCharsets.UTF_8));
        outputStream.closeEntry();
    } catch (final IOException e) {
        throw new IllegalStateException(e);
    }
    return target;
}