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

Example 41 with MethodVisitor

use of org.apache.xbean.asm6.MethodVisitor 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 42 with MethodVisitor

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

the class ReturnValidationGenerator method generateMethods.

protected void generateMethods(final ClassWriter cw) {
    for (final MethodConstraints methodConstraints : constraints) {
        final Method method = methodConstraints.getMethod();
        final String name = method.getName();
        // Declare a method of return type JsonWebToken for use with
        // a call to BeanValidation's ExecutableValidator.validateReturnValue
        final Type returnType = Type.getReturnType(method);
        final Type[] parameterTypes = Type.getArgumentTypes(method);
        final String descriptor = Type.getMethodDescriptor(returnType, parameterTypes);
        final MethodVisitor mv = cw.visitMethod(ACC_PUBLIC, name, descriptor, null, null);
        // Put the method name on the
        final AnnotationVisitor av = mv.visitAnnotation(Type.getDescriptor(Generated.class), true);
        av.visit("value", this.getClass().getName());
        av.visitEnd();
        // track the MethodVisitor
        // We will later copy over the annotations
        generatedMethods.put(method.getName() + Type.getMethodDescriptor(method), new ConstrainedMethodVisitor(mv, methodConstraints));
        if (method.getReturnType().equals(Void.TYPE)) {
            mv.visitCode();
            mv.visitInsn(RETURN);
            mv.visitMaxs(0, 1);
        } else if (method.getReturnType().equals(Long.TYPE)) {
            mv.visitCode();
            mv.visitInsn(LCONST_0);
            mv.visitInsn(LRETURN);
            mv.visitMaxs(2, 4);
            mv.visitEnd();
        } else if (method.getReturnType().equals(Float.TYPE)) {
            mv.visitCode();
            mv.visitInsn(FCONST_0);
            mv.visitInsn(FRETURN);
            mv.visitMaxs(1, 3);
            mv.visitEnd();
        } else if (method.getReturnType().equals(Double.TYPE)) {
            mv.visitCode();
            mv.visitInsn(DCONST_0);
            mv.visitInsn(DRETURN);
            mv.visitMaxs(2, 4);
            mv.visitEnd();
        } else if (method.getReturnType().isPrimitive()) {
            mv.visitCode();
            mv.visitInsn(ICONST_0);
            mv.visitInsn(IRETURN);
            mv.visitMaxs(1, 3);
            mv.visitEnd();
        } else {
            // The method will simply return null
            mv.visitCode();
            mv.visitInsn(ACONST_NULL);
            mv.visitInsn(ARETURN);
            mv.visitMaxs(1, 1);
        }
    }
}

Example 43 with MethodVisitor

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

the class JwtValidationGenerator method generateMethods.

protected void generateMethods(final ClassWriter cw) {
    for (final MethodConstraints methodConstraints : constraints) {
        final Method method = methodConstraints.getMethod();
        final String name = method.getName();
        // Declare a method of return type JsonWebToken for use with
        // a call to BeanValidation's ExecutableValidator.validateReturnValue
        final Type returnType = Type.getType(JsonWebToken.class);
        final Type[] parameterTypes = Type.getArgumentTypes(method);
        final String descriptor = Type.getMethodDescriptor(returnType, parameterTypes);
        final int access = method.isVarArgs() ? ACC_PUBLIC + ACC_VARARGS : ACC_PUBLIC;
        final MethodVisitor mv = cw.visitMethod(access, name, descriptor, null, null);
        // Put the method name on the
        final AnnotationVisitor av = mv.visitAnnotation(Type.getDescriptor(Generated.class), true);
        av.visit("value", this.getClass().getName());
        av.visitEnd();
        // track the MethodVisitor
        // We will later copy over the annotations
        generatedMethods.put(method.getName() + Type.getMethodDescriptor(method), new ConstrainedMethodVisitor(mv, methodConstraints));
        // The method will simply return null
        mv.visitCode();
        mv.visitInsn(ACONST_NULL);
        mv.visitInsn(ARETURN);
        mv.visitMaxs(1, 1);
    }
}