Examples with MethodVisitor org.apache.xbean.asm5.MethodVisitor used on opensource projects

Example 21 with MethodVisitor

use of org.apache.xbean.asm5.MethodVisitor in project tomee by apache.

the class Cmp2Generator method createOpenEJB_addCmr.

/**
 * Generate the OpenEJB_addCmr logic for an individual
 * CMR field.  Each CMR field has a test against the
 * property name, which is passed to the wrappering
 * addCmr method.  This results in a series of
 * if blocks for each defined CMD property.
 *
 * @param mv       The method we're generating within.
 * @param cmrField The CMR field definition.
 */
private void createOpenEJB_addCmr(final MethodVisitor mv, final CmrField cmrField) {
    // if (${cmrField.name}.equals(arg1))
    mv.visitLdcInsn(cmrField.getName());
    mv.visitVarInsn(ALOAD, 1);
    mv.visitMethodInsn(INVOKEVIRTUAL, "java/lang/String", "equals", "(Ljava/lang/Object;)Z", false);
    // if not equal jump to end
    final Label end = new Label();
    mv.visitJumpInsn(IFEQ, end);
    // collection already anchored in the CMR field.
    if (cmrField.getCmrStyle() != CmrStyle.SINGLE) {
        mv.visitVarInsn(ALOAD, 0);
        mv.visitFieldInsn(GETFIELD, implClassName, cmrField.getName(), cmrField.getDescriptor());
        mv.visitVarInsn(ASTORE, 3);
        mv.visitVarInsn(ALOAD, 3);
        final Label fieldNotNull = new Label();
        mv.visitJumpInsn(IFNONNULL, fieldNotNull);
        // lazy creation of the collection type if not already created.
        mv.visitTypeInsn(NEW, cmrField.getInitialValueType().getInternalName());
        mv.visitInsn(DUP);
        mv.visitMethodInsn(INVOKESPECIAL, cmrField.getInitialValueType().getInternalName(), "<init>", "()V", false);
        mv.visitVarInsn(ASTORE, 3);
        mv.visitLabel(fieldNotNull);
        // ${cmrField.name}.add(arg2)
        mv.visitVarInsn(ALOAD, 3);
        mv.visitVarInsn(ALOAD, 2);
        mv.visitMethodInsn(INVOKEINTERFACE, cmrField.getCmrStyle().getCollectionType().getInternalName(), "add", "(Ljava/lang/Object;)Z", true);
        mv.visitInsn(POP);
        mv.visitVarInsn(ALOAD, 0);
        mv.visitVarInsn(ALOAD, 3);
        // unconditionally set the CMR field to the collection.  This is either the
        // original one on entry, or a new one for first access.
        mv.visitFieldInsn(PUTFIELD, implClassName, cmrField.getName(), cmrField.getDescriptor());
        // return null;
        mv.visitInsn(ACONST_NULL);
        mv.visitInsn(ARETURN);
    } else {
        // push: this.${cmrField.name};
        mv.visitVarInsn(ALOAD, 0);
        mv.visitFieldInsn(GETFIELD, implClassName, cmrField.getName(), cmrField.getDescriptor());
        // this.${cmrField.name} = (${cmrField.type}) bean;
        mv.visitVarInsn(ALOAD, 0);
        mv.visitVarInsn(ALOAD, 2);
        mv.visitTypeInsn(CHECKCAST, cmrField.getType().getInternalName());
        mv.visitFieldInsn(PUTFIELD, implClassName, cmrField.getName(), cmrField.getDescriptor());
        // return pushed value above
        mv.visitInsn(ARETURN);
    }
    // end of if statement
    mv.visitLabel(end);
}

Example 22 with MethodVisitor

use of org.apache.xbean.asm5.MethodVisitor in project tomee by apache.

the class Cmp2Generator method createOpenEJB_isDeleted.

private void createOpenEJB_isDeleted() {
    final MethodVisitor mv = cw.visitMethod(ACC_PUBLIC, "OpenEJB_isDeleted", "()Z", null, null);
    mv.visitCode();
    mv.visitVarInsn(ALOAD, 0);
    mv.visitFieldInsn(GETFIELD, implClassName, DELETED, "Z");
    mv.visitInsn(IRETURN);
    mv.visitMaxs(0, 0);
    mv.visitEnd();
}

Example 23 with MethodVisitor

use of org.apache.xbean.asm5.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();
}

Example 24 with MethodVisitor

use of org.apache.xbean.asm5.MethodVisitor in project tomee by apache.

the class Cmp2Generator method createOpenEJB_addCmr.

private void createOpenEJB_addCmr() {
    final MethodVisitor mv = cw.visitMethod(ACC_PUBLIC, "OpenEJB_addCmr", "(Ljava/lang/String;Ljava/lang/Object;)Ljava/lang/Object;", null, null);
    mv.visitCode();
    // if (deleted) return null;
    mv.visitVarInsn(ALOAD, 0);
    mv.visitFieldInsn(GETFIELD, implClassName, DELETED, "Z");
    final Label notDeleted = new Label();
    mv.visitJumpInsn(IFEQ, notDeleted);
    mv.visitInsn(ACONST_NULL);
    mv.visitInsn(ARETURN);
    mv.visitLabel(notDeleted);
    for (final CmrField cmrField : cmrFields) {
        // if ("${cmrField.name}".equals(name)) {
        // ${cmrField.name}.add((${cmrField.type})value);
        // return null;
        // }
        // 
        // OR
        // 
        // if ("${cmrField.name}".equals(name)) {
        // Object oldValue = ${cmrField.name};
        // ${cmrField.name} = (${cmrField.type}) bean;
        // return oldValue;
        // }
        createOpenEJB_addCmr(mv, cmrField);
    }
    // throw new IllegalArgumentException("Unknown cmr field " + name + " on entity bean of type " + getClass().getName());
    mv.visitTypeInsn(NEW, "java/lang/IllegalArgumentException");
    mv.visitInsn(DUP);
    mv.visitTypeInsn(NEW, "java/lang/StringBuilder");
    mv.visitInsn(DUP);
    mv.visitMethodInsn(INVOKESPECIAL, "java/lang/StringBuilder", "<init>", "()V", false);
    mv.visitLdcInsn("Unknown cmr field ");
    mv.visitMethodInsn(INVOKEVIRTUAL, "java/lang/StringBuilder", "append", "(Ljava/lang/String;)Ljava/lang/StringBuilder;", false);
    mv.visitVarInsn(ALOAD, 1);
    mv.visitMethodInsn(INVOKEVIRTUAL, "java/lang/StringBuilder", "append", "(Ljava/lang/String;)Ljava/lang/StringBuilder;", false);
    mv.visitLdcInsn(" on entity bean of type ");
    mv.visitMethodInsn(INVOKEVIRTUAL, "java/lang/StringBuilder", "append", "(Ljava/lang/String;)Ljava/lang/StringBuilder;", false);
    mv.visitVarInsn(ALOAD, 0);
    mv.visitMethodInsn(INVOKEVIRTUAL, "java/lang/Object", "getClass", "()Ljava/lang/Class;", false);
    mv.visitMethodInsn(INVOKEVIRTUAL, "java/lang/Class", "getName", "()Ljava/lang/String;", false);
    mv.visitMethodInsn(INVOKEVIRTUAL, "java/lang/StringBuilder", "append", "(Ljava/lang/String;)Ljava/lang/StringBuilder;", false);
    mv.visitMethodInsn(INVOKEVIRTUAL, "java/lang/StringBuilder", "toString", "()Ljava/lang/String;", false);
    mv.visitMethodInsn(INVOKESPECIAL, "java/lang/IllegalArgumentException", "<init>", "(Ljava/lang/String;)V", false);
    mv.visitInsn(ATHROW);
    mv.visitMaxs(0, 0);
    mv.visitEnd();
}

Example 25 with MethodVisitor

use of org.apache.xbean.asm5.MethodVisitor in project tomee by apache.

the class Cmp2Generator method createConstructor.

private void createConstructor() {
    final MethodVisitor mv = cw.visitMethod(ACC_PUBLIC, "<init>", "()V", null, null);
    mv.visitCode();
    mv.visitVarInsn(ALOAD, 0);
    mv.visitMethodInsn(INVOKESPECIAL, beanClassName, "<init>", "()V", false);
    for (final CmrField cmrField : cmrFields) {
        initCmrFields(mv, cmrField);
    }
    mv.visitInsn(RETURN);
    mv.visitMaxs(0, 0);
    mv.visitEnd();
}