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

Example 26 with MethodVisitor

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

the class PluginGenerator method addConstructor.

private void addConstructor(final ClassWriter writer) {
    final MethodVisitor constructor = writer.visitMethod(ACC_PUBLIC, "<init>", "()V", null, null);
    constructor.visitCode();
    constructor.visitVarInsn(ALOAD, 0);
    constructor.visitMethodInsn(INVOKESPECIAL, "java/lang/Object", "<init>", "()V", false);
    constructor.visitInsn(RETURN);
    constructor.visitMaxs(1, 1);
    constructor.visitEnd();
}

Example 27 with MethodVisitor

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

the class PluginGenerator method createProcessor.

private byte[] createProcessor(final JarOutputStream outputStream, final String packageName) 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", "proc");
    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 28 with MethodVisitor

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

the class Cmp2Generator method createCmrGetter.

/**
 * Create a getter method for the CMR field.  This
 * will used the accessor object initialized into the
 * name + "Cmr" field that was already generated and
 * initialized at object creation.  The accessor
 * object manages the object relationship.
 *
 * @param cmrField The field we're generating.
 */
private void createCmrGetter(final CmrField cmrField) {
    // no back reference.  We don't generate a getter method for this
    if (cmrField.isSynthetic()) {
        return;
    }
    final String methodName = getterName(cmrField.getName());
    final MethodVisitor mv = cw.visitMethod(ACC_PUBLIC, methodName, "()" + cmrField.getProxyDescriptor(), null, null);
    mv.visitCode();
    mv.visitVarInsn(ALOAD, 0);
    mv.visitFieldInsn(GETFIELD, implClassName, cmrField.getName() + "Cmr", cmrField.getAccessorDescriptor());
    mv.visitVarInsn(ALOAD, 0);
    mv.visitFieldInsn(GETFIELD, implClassName, cmrField.getName(), cmrField.getDescriptor());
    // return this.${cmrField.name}Cmr.get(this.${cmdField.name});
    // this takes the value stored in the CMR field (which might be a single value or
    // a Set or Collection), and hands it to the appropriate accessor.
    mv.visitMethodInsn(INVOKEVIRTUAL, cmrField.getAccessorInternalName(), "get", cmrField.getCmrStyle().getGetterDescriptor(), false);
    // to the target class before returning.
    if (cmrField.getCmrStyle() == CmrStyle.SINGLE) {
        mv.visitTypeInsn(CHECKCAST, cmrField.getProxyType().getInternalName());
    }
    mv.visitInsn(ARETURN);
    mv.visitMaxs(0, 0);
    mv.visitEnd();
}

Example 29 with MethodVisitor

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

the class Cmp2Generator method createOpenEJB_deleted.

private void createOpenEJB_deleted() {
    final MethodVisitor mv = cw.visitMethod(ACC_PUBLIC, "OpenEJB_deleted", "()V", null, null);
    mv.visitCode();
    /* if (deleted) return; */
    mv.visitVarInsn(ALOAD, 0);
    mv.visitFieldInsn(GETFIELD, implClassName, DELETED, "Z");
    final Label notDeleted = new Label();
    mv.visitJumpInsn(IFEQ, notDeleted);
    mv.visitInsn(RETURN);
    mv.visitLabel(notDeleted);
    // deleted = true;
    mv.visitVarInsn(ALOAD, 0);
    mv.visitInsn(ICONST_1);
    mv.visitFieldInsn(PUTFIELD, implClassName, DELETED, "Z");
    for (final CmrField cmrField : cmrFields) {
        // ${cmrField.accessor}.delete(${cmrField.name});
        createOpenEJB_deleted(mv, cmrField);
    }
    // return;
    mv.visitInsn(RETURN);
    mv.visitMaxs(0, 0);
    mv.visitEnd();
}

Example 30 with MethodVisitor

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

the class Cmp2Generator method createSelectMethod.

/**
 * Generate a concrete implementation of an abstract
 * ejbSelectxxxx method.
 *
 * @param selectMethod The abstract definition for the method we're generating.
 */
private void createSelectMethod(final Method selectMethod) {
    final Class<?> returnType = selectMethod.getReturnType();
    final Method executeMethod = EjbSelect.getSelectMethod(returnType);
    final MethodVisitor mv = cw.visitMethod(ACC_PUBLIC, selectMethod.getName(), Type.getMethodDescriptor(selectMethod), null, getExceptionTypes(selectMethod));
    mv.visitCode();
    // push deploymentInfo
    mv.visitFieldInsn(GETSTATIC, implClassName, "deploymentInfo", "Ljava/lang/Object;");
    // push method signature
    mv.visitLdcInsn(getSelectMethodSignature(selectMethod));
    // one of the primitives.
    if (!returnType.isPrimitive()) {
        mv.visitLdcInsn(returnType.getName());
    }
    // new Object[]
    mv.visitIntInsn(BIPUSH, selectMethod.getParameterTypes().length);
    mv.visitTypeInsn(ANEWARRAY, "java/lang/Object");
    // object[i] = arg${i}
    int i = 0;
    for (final Class<?> parameterType : selectMethod.getParameterTypes()) {
        // push arguement i on stack
        mv.visitInsn(DUP);
        bipush(mv, i);
        mv.visitVarInsn(Type.getType(parameterType).getOpcode(ILOAD), i + 1);
        // convert argument on stack to an Object
        Convert.toObjectFrom(mv, parameterType);
        // store it into the array
        mv.visitInsn(AASTORE);
        if (long.class.equals(parameterType) || double.class.equals(parameterType)) {
            // longs and doubles are double wide
            i = i + 2;
        } else {
            i++;
        }
    }
    // EjbSelect.execute_xxxx(deploymentInfo, signature, [returnType.] args[]);
    mv.visitMethodInsn(INVOKESTATIC, Type.getInternalName(executeMethod.getDeclaringClass()), executeMethod.getName(), Type.getMethodDescriptor(executeMethod), false);
    // needs to match the type returned from the method call
    if (!Void.TYPE.equals(returnType)) {
        // stack already
        if (!returnType.isPrimitive()) {
            // convert return type
            Convert.fromObjectTo(mv, returnType);
        }
        // And generate the appropriate return for the type
        mv.visitInsn(Type.getReturnType(selectMethod).getOpcode(IRETURN));
    } else {
        // void return is just a RETURN.
        mv.visitInsn(RETURN);
    }
    // close method
    mv.visitMaxs(0, 0);
    mv.visitEnd();
}