Example usage for org.objectweb.asm MethodVisitor visitLabel

List of usage examples for org.objectweb.asm MethodVisitor visitLabel

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Introduction

In this page you can find the example usage for org.objectweb.asm MethodVisitor visitLabel.

Prototype

public void visitLabel(final Label label)

Source Link

Document

Visits a label.

Usage

From source file:org.apache.directmemory.lightning.internal.generator.BytecodeMarshallerGenerator.java

License:Apache License

private void createConstructor(ClassWriter cw, String className, List<PropertyDescriptor> propertyDescriptors) {
    MethodVisitor mv = cw.visitMethod(ACC_PUBLIC, "<init>", MARSHALLER_CONSTRUCTOR_SIGNATURE, null, null);
    mv.visitCode();/*from   ww  w  . j  ava  2 s .  c  o m*/

    // Load this
    mv.visitVarInsn(ALOAD, 0);

    // Load first parameter type (Class)
    mv.visitVarInsn(ALOAD, 1);

    // Load second parameter type (Map)
    mv.visitVarInsn(ALOAD, 2);

    // Load third parameter type (ClassDescriptorAwaySerializer)
    mv.visitVarInsn(ALOAD, 3);

    // Load fourth parameter type (ObjenesisSerializer)
    mv.visitVarInsn(ALOAD, 4);

    // Call super(Class, Map)
    mv.visitMethodInsn(INVOKESPECIAL, SUPER_CLASS_INTERNAL_TYPE, "<init>",
            MARSHALLER_SUPER_CONSTRUCTOR_SIGNATURE);

    // Fill fields with marshallers
    for (int i = 0; i < propertyDescriptors.size(); i++) {
        PropertyDescriptor propertyDescriptor = propertyDescriptors.get(i);
        String fieldName = toFinalFieldName("marshaller", propertyDescriptor);
        mv.visitVarInsn(ALOAD, 0);
        mv.visitVarInsn(ALOAD, 0);

        // Load property type
        mv.visitVarInsn(ALOAD, 5);
        mv.visitIntInsn(BIPUSH, i);
        mv.visitMethodInsn(INVOKEINTERFACE, LIST_CLASS_INTERNAL_TYPE, "get", "(I)Ljava/lang/Object;");

        // Store PropertyDescriptor
        mv.visitTypeInsn(CHECKCAST, PROPERTYDESCRIPTOR_CLASS_INTERNAL_TYPE);
        mv.visitFieldInsn(PUTFIELD, className, toFinalFieldName("descriptor", propertyDescriptor),
                PROPERTYDESCRIPTOR_CLASS_DESCRIPTOR);

        if (propertyDescriptor.getType().isArray()
                && !propertyDescriptor.getType().getComponentType().isPrimitive()) {
            Label labelNonNull = new Label();

            // Get type from PropertyAccessor
            mv.visitVarInsn(ALOAD, 0);
            mv.visitFieldInsn(GETFIELD, className, toFinalFieldName("descriptor", propertyDescriptor),
                    PROPERTYDESCRIPTOR_CLASS_DESCRIPTOR);
            mv.visitMethodInsn(INVOKEINTERFACE, PROPERTYDESCRIPTOR_CLASS_INTERNAL_TYPE, "getType",
                    "()Ljava/lang/Class;");

            // Get array component type
            mv.visitMethodInsn(INVOKEVIRTUAL, CLASS_CLASS_INTERNAL_TYPE, "getComponentType",
                    CLASS_GET_COMPONENT_TYPE);
            mv.visitVarInsn(ASTORE, 9);

            // Generate cheating PropertyDescriptor for component type
            mv.visitVarInsn(ALOAD, 0);
            mv.visitTypeInsn(NEW, CHEATINGPROPERTYDESCRIPTOR_CLASS_INTERNAL_TYPE);
            mv.visitInsn(DUP);
            mv.visitLdcInsn(propertyDescriptor.getPropertyName() + "Element");
            mv.visitVarInsn(ALOAD, 9);
            mv.visitInsn(ACONST_NULL);
            mv.visitMethodInsn(INVOKESPECIAL, CHEATINGPROPERTYDESCRIPTOR_CLASS_INTERNAL_TYPE, "<init>",
                    CHEATINGPROPERTYDESCRIPTOR_CONSTRUCTOR);
            mv.visitFieldInsn(PUTFIELD, className, toFinalFieldName("component", propertyDescriptor),
                    CHEATINGPROPERTYDESCRIPTOR_CLASS_DESCRIPTOR);

            // Search marshaller by using interal ones
            mv.visitVarInsn(ALOAD, 6);
            mv.visitVarInsn(ALOAD, 9);
            mv.visitInsn(ACONST_NULL);
            mv.visitMethodInsn(INVOKEINTERFACE, MARSHALLERSTRATEGY_CLASS_INTERNAL_TYPE, "getMarshaller",
                    MARSHALLERSTRATEGY_GET_MARSHALLER_SIGNATURE);
            mv.visitVarInsn(ASTORE, 8);
            mv.visitVarInsn(ALOAD, 8);

            // Search marshaller for property type
            mv.visitJumpInsn(IFNONNULL, labelNonNull);
            mv.visitVarInsn(ALOAD, 0);
            mv.visitVarInsn(ALOAD, 0);
            mv.visitFieldInsn(GETFIELD, className, toFinalFieldName("component", propertyDescriptor),
                    CHEATINGPROPERTYDESCRIPTOR_CLASS_DESCRIPTOR);
            mv.visitMethodInsn(INVOKEVIRTUAL, SUPER_CLASS_INTERNAL_TYPE, "findMarshaller",
                    MARSHALLER_FIND_MARSHALLER_SIGNATURE);
            mv.visitVarInsn(ASTORE, 8);

            // Save marshaller to field
            mv.visitLabel(labelNonNull);
            mv.visitVarInsn(ALOAD, 0);
            mv.visitVarInsn(ALOAD, 8);
            mv.visitFieldInsn(PUTFIELD, className, toFinalFieldName("marshaller", propertyDescriptor),
                    MARSHALLER_CLASS_DESCRIPTOR);
        } else {
            // Check if marshaller is defined
            mv.visitVarInsn(ALOAD, 0);
            mv.visitVarInsn(ALOAD, 0);
            mv.visitVarInsn(ALOAD, 0);
            mv.visitFieldInsn(GETFIELD, className, toFinalFieldName("descriptor", propertyDescriptor),
                    PROPERTYDESCRIPTOR_CLASS_DESCRIPTOR);
            mv.visitMethodInsn(INVOKEVIRTUAL, SUPER_CLASS_INTERNAL_TYPE, "findMarshaller",
                    MARSHALLER_FIND_MARSHALLER_SIGNATURE);
            mv.visitFieldInsn(PUTFIELD, className, fieldName, MARSHALLER_CLASS_DESCRIPTOR);
        }

        // Load this to method stack
        mv.visitVarInsn(ALOAD, 0);
        mv.visitInsn(DUP);

        // Load property accessor
        mv.visitFieldInsn(GETFIELD, className, toFinalFieldName("descriptor", propertyDescriptor),
                PROPERTYDESCRIPTOR_CLASS_DESCRIPTOR);
        mv.visitMethodInsn(INVOKEINTERFACE, PROPERTYDESCRIPTOR_CLASS_INTERNAL_TYPE, "getPropertyAccessor",
                PROPERTY_DESCRIPTOR_GET_PROPERTYACCESSOR_SIGNATURE);

        // Save PropertyAccessor to field
        mv.visitFieldInsn(PUTFIELD, className, toFinalFieldName("accessor", propertyDescriptor),
                PROPERTYACCESSOR_CLASS_DESCRIPTOR);
    }

    mv.visitInsn(RETURN);
    mv.visitMaxs(-1, 12);
    mv.visitEnd();
}

From source file:org.apache.directmemory.lightning.internal.generator.BytecodeMarshallerGenerator.java

License:Apache License

private void createMarshallMethod(ClassWriter cw, String className, Class<?> type,
        SerializationStrategy serializationStrategy, List<PropertyDescriptor> propertyDescriptors) {

    MethodVisitor mv = cw.visitMethod(ACC_PUBLIC, "marshall", MARSHALLER_MARSHALL_SIGNATURE, null,
            MARSHALLER_EXCEPTIONS);/* w  w w .  j  av a 2  s.c  o m*/

    // If element type is not reference capable or SerializationStrategy is
    // not SizeOptimized just prevent generation of code
    if (serializationStrategy == SerializationStrategy.SizeOptimized && ClassUtil.isReferenceCapable(type)) {
        // Load this to method stack
        mv.visitVarInsn(ALOAD, 0);

        // Load value to method stack
        mv.visitVarInsn(ALOAD, 1);

        // Load type to method stack
        mv.visitVarInsn(ALOAD, 2);

        // Load dataOutput to method stack
        mv.visitVarInsn(ALOAD, 3);

        // Load serializationContext to method stack
        mv.visitVarInsn(ALOAD, 4);

        // Call super.isAlreadyMarshalled(...);
        mv.visitMethodInsn(INVOKEVIRTUAL, SUPER_CLASS_INTERNAL_TYPE, "isAlreadyMarshalled",
                MARSHALLER_IS_ALREADY_MARSHALLED_SIGNATURE);

        // Label if value is not yet marshalled
        Label notYetMarshalled = new Label();

        // Test if already marshalled
        mv.visitJumpInsn(IFEQ, notYetMarshalled);

        // If marshalled - just return
        mv.visitInsn(RETURN);

        // Visit label - if not yet marshalled - marshall it
        mv.visitLabel(notYetMarshalled);
    }

    for (PropertyDescriptor propertyDescriptor : propertyDescriptors) {
        if (propertyDescriptor.getType().isArray()
                && !propertyDescriptor.getType().getComponentType().isPrimitive()) {
            visitObjectArrayPropertyAccessorRead(mv, className, propertyDescriptor);
        } else {
            visitValuePropertyAccessorRead(mv, className, propertyDescriptor);
        }
    }

    // Add Return instruction
    mv.visitInsn(RETURN);

    // End visiting
    mv.visitMaxs(9, 9);
    mv.visitEnd();
}

From source file:org.apache.directmemory.lightning.internal.generator.BytecodeMarshallerGenerator.java

License:Apache License

private void visitObjectArrayPropertyAccessorRead(MethodVisitor mv, String className,
        PropertyDescriptor propertyDescriptor) {
    Class<?> propertyType = propertyDescriptor.getType();

    // Load this to method stack
    mv.visitVarInsn(ALOAD, 0);//from w w w.  ja  v  a 2s. c om

    // Read PropertyAccessor from field
    mv.visitFieldInsn(GETFIELD, className, toFinalFieldName("accessor", propertyDescriptor),
            PROPERTYACCESSOR_CLASS_DESCRIPTOR);
    mv.visitTypeInsn(CHECKCAST, ARRAYPROPERTYACCESSOR_CLASS_INTERNAL_TYPE);
    mv.visitVarInsn(ASTORE, 8);

    // Load property type
    mv.visitVarInsn(ALOAD, 8);
    mv.visitInsn(DUP);
    mv.visitMethodInsn(INVOKEINTERFACE, PROPERTYACCESSOR_CLASS_INTERNAL_TYPE, "getType",
            OBJECT_GET_CLASS_SIGNATURE);
    mv.visitVarInsn(ASTORE, 5);

    // Load value to method stack
    mv.visitVarInsn(ALOAD, 1);

    // Save array to stack position 6
    visitPropertyAccessorValueRead(propertyType, mv);
    mv.visitTypeInsn(CHECKCAST, Type.getType(propertyType).getInternalName());
    mv.visitVarInsn(ASTORE, 6);

    // Save length to stream
    mv.visitVarInsn(ALOAD, 3);
    mv.visitVarInsn(ALOAD, 6);
    mv.visitInsn(ARRAYLENGTH);
    mv.visitMethodInsn(INVOKEINTERFACE, DATAOUTPUT_CLASS_INTERNAL_TYPE, "writeInt", "(I)V");

    // Loop over every element in array
    Label forLoopEnd = new Label();
    Label forLoopStart = new Label();
    mv.visitInsn(ICONST_0);
    mv.visitVarInsn(ISTORE, 7);
    mv.visitJumpInsn(GOTO, forLoopEnd);
    mv.visitLabel(forLoopStart);

    // Load this to method stack
    mv.visitVarInsn(ALOAD, 0);

    // Load property marshaller on stack
    mv.visitFieldInsn(GETFIELD, className, toFinalFieldName("marshaller", propertyDescriptor),
            MARSHALLER_CLASS_DESCRIPTOR);

    // Load PropertyAccessor to method stack
    mv.visitVarInsn(ALOAD, 8);

    // Load array to method stack
    mv.visitVarInsn(ALOAD, 6);

    // Load index to method stack
    mv.visitVarInsn(ILOAD, 7);

    // Get value from array
    mv.visitMethodInsn(INVOKEINTERFACE, ARRAYPROPERTYACCESSOR_CLASS_INTERNAL_TYPE, "readObject",
            PROPERTY_ACCESSOR_ARRAY_READ_OBJECT_SIGNATURE);
    mv.visitTypeInsn(CHECKCAST, Type.getType(propertyType.getComponentType()).getInternalName());

    // If type is primitive add some "autoboxing" magic
    if (propertyType.getComponentType().isPrimitive()) {
        visitWrapperAutoboxing(propertyType.getComponentType(), mv);
    }

    // Load type to method stack
    mv.visitVarInsn(ALOAD, 0);
    mv.visitFieldInsn(GETFIELD, className, toFinalFieldName("component", propertyDescriptor),
            CHEATINGPROPERTYDESCRIPTOR_CLASS_DESCRIPTOR);

    // Load DataOutput to method stack
    mv.visitVarInsn(ALOAD, 3);

    // Load SerializationContext to method stack
    mv.visitVarInsn(ALOAD, 4);

    // Call Marshaller#marshall on properties marshaller
    mv.visitMethodInsn(INVOKEINTERFACE, MARSHALLER_CLASS_INTERNAL_TYPE, "marshall",
            MARSHALLER_MARSHALL_SIGNATURE);

    // Test if loop ends
    mv.visitIincInsn(7, 1);
    mv.visitLabel(forLoopEnd);
    mv.visitVarInsn(ILOAD, 7);
    mv.visitVarInsn(ALOAD, 6);
    mv.visitInsn(ARRAYLENGTH);
    mv.visitJumpInsn(IF_ICMPLT, forLoopStart);
}

From source file:org.apache.directmemory.lightning.internal.generator.BytecodeMarshallerGenerator.java

License:Apache License

private void visitObjectArrayPropertyAccessorWrite(MethodVisitor mv, String className,
        PropertyDescriptor propertyDescriptor) {
    Class<?> propertyType = propertyDescriptor.getType();
    Class<?> componentType = propertyType.getComponentType();

    // Read size// w w w  .j a  v a  2 s .  co  m
    mv.visitVarInsn(ALOAD, 3);
    mv.visitMethodInsn(INVOKEINTERFACE, DATAINPUT_CLASS_INTERNAL_TYPE, "readInt", "()I");
    mv.visitInsn(DUP);
    mv.visitVarInsn(ISTORE, 5);

    // Instantiate array
    mv.visitTypeInsn(ANEWARRAY, Type.getType(componentType).getInternalName());
    mv.visitVarInsn(ASTORE, 6);

    // Read PropertyAccessor from field
    mv.visitVarInsn(ALOAD, 0);
    mv.visitFieldInsn(GETFIELD, className, toFinalFieldName("accessor", propertyDescriptor),
            PROPERTYACCESSOR_CLASS_DESCRIPTOR);
    mv.visitVarInsn(ASTORE, 9);

    // Get component type
    mv.visitVarInsn(ALOAD, 0);
    mv.visitFieldInsn(GETFIELD, className, toFinalFieldName("component", propertyDescriptor),
            CHEATINGPROPERTYDESCRIPTOR_CLASS_DESCRIPTOR);
    mv.visitVarInsn(ASTORE, 8);

    mv.visitVarInsn(ALOAD, 0);
    mv.visitFieldInsn(GETFIELD, className, toFinalFieldName("marshaller", propertyDescriptor),
            MARSHALLER_CLASS_DESCRIPTOR);
    mv.visitVarInsn(ASTORE, 10);

    // For loop
    Label forLoopStart = new Label();
    Label forLoopEnd = new Label();
    mv.visitInsn(ICONST_0);
    mv.visitVarInsn(ISTORE, 7);
    mv.visitJumpInsn(GOTO, forLoopEnd);
    mv.visitLabel(forLoopStart);

    // Write value to array
    mv.visitVarInsn(ALOAD, 9);
    mv.visitVarInsn(ALOAD, 6);
    mv.visitVarInsn(ILOAD, 7);

    // Read value from stream to 4th stack position
    mv.visitVarInsn(ALOAD, 10);
    mv.visitVarInsn(ALOAD, 8);
    mv.visitVarInsn(ALOAD, 3);
    mv.visitVarInsn(ALOAD, 4);
    mv.visitMethodInsn(INVOKEINTERFACE, MARSHALLER_CLASS_INTERNAL_TYPE, "unmarshall",
            MARSHALLER_BASE_UNMARSHALL_SIGNATURE);

    mv.visitMethodInsn(INVOKEINTERFACE, ARRAYPROPERTYACCESSOR_CLASS_INTERNAL_TYPE, "writeObject",
            PROPERTY_ACCESSOR_ARRAY_WRITE_OBJECT_SIGNATURE);

    // Increment counter
    mv.visitIincInsn(7, 1);

    // Test for loop end
    mv.visitLabel(forLoopEnd);
    mv.visitVarInsn(ILOAD, 7);
    mv.visitVarInsn(ILOAD, 5);
    mv.visitJumpInsn(IF_ICMPLT, forLoopStart);

    // Write array to object
    mv.visitVarInsn(ALOAD, 9);
    mv.visitVarInsn(ALOAD, 1);
    mv.visitVarInsn(ALOAD, 6);
    visitPropertyAccessorValueWrite(propertyType.getComponentType(), mv);
}

From source file:org.apache.felix.ipojo.composite.service.provides.POJOWriter.java

License:Apache License

/**
 * Generate on method.//  w ww  . ja v  a 2 s  . co m
 * @param cw : class writer
 * @param className : the current class name
 * @param method : the method to generate
 * @param sign : method signature to generate
 * @param delegator : the field on which delegate
 * @param handler : the handler (used to acess the logger)
 */
private static void generateMethod(ClassWriter cw, String className, MethodMetadata method, Method sign,
        FieldMetadata delegator, Handler handler) {
    String desc = Type.getMethodDescriptor(sign);
    String name = sign.getName();
    String[] exc = new String[sign.getExceptionTypes().length];
    for (int i = 0; i < sign.getExceptionTypes().length; i++) {
        exc[i] = Type.getType(sign.getExceptionTypes()[i]).getInternalName();
    }

    MethodVisitor mv = cw.visitMethod(ACC_PUBLIC, name, desc, null, exc);

    if (delegator.isOptional()) {
        if (!delegator.isAggregate()) {
            generateOptionalCase(mv, delegator, className);
        }
        if (delegator.isAggregate() /*&& method.getPolicy() == MethodMetadata.ONE_POLICY*/) {
            generateOptionalAggregateCase(mv, delegator, className);
        }
    }

    if (delegator.isAggregate()) {
        if (method.getPolicy() == MethodMetadata.ONE_POLICY) {
            // Aggregate and One Policy
            mv.visitVarInsn(ALOAD, 0);
            mv.visitFieldInsn(GETFIELD, className, delegator.getName(),
                    "[L" + delegator.getSpecification().getName().replace('.', '/') + ";");
            mv.visitInsn(ICONST_0); // Use the first one
            mv.visitInsn(AALOAD);

            loadArgs(mv, ACC_PUBLIC, Type.getArgumentTypes(desc));

            // Invoke
            mv.visitMethodInsn(INVOKEINTERFACE, delegator.getSpecification().getName().replace('.', '/'), name,
                    desc);

            // Return
            mv.visitInsn(Type.getReturnType(desc).getOpcode(Opcodes.IRETURN));

        } else { // All policy
            if (Type.getReturnType(desc).getSort() != Type.VOID) {
                handler.error("All policy cannot be used on method which does not return void");
            }

            Type[] args = Type.getArgumentTypes(desc);
            int index = args.length + 1;

            // Init
            mv.visitInsn(ICONST_0);
            mv.visitVarInsn(ISTORE, index);
            Label l1b = new Label();
            mv.visitLabel(l1b);
            Label l2b = new Label();
            mv.visitJumpInsn(GOTO, l2b);

            // Loop
            Label l3b = new Label();
            mv.visitLabel(l3b);
            mv.visitVarInsn(ALOAD, 0);
            mv.visitFieldInsn(GETFIELD, className, delegator.getName(),
                    "[L" + delegator.getSpecification().getName().replace('.', '/') + ";");
            mv.visitVarInsn(ILOAD, index);
            mv.visitInsn(AALOAD);

            loadArgs(mv, ACC_PUBLIC, Type.getArgumentTypes(desc));

            mv.visitMethodInsn(INVOKEINTERFACE, delegator.getSpecification().getName().replace('.', '/'), name,
                    desc);

            Label l4b = new Label();
            mv.visitLabel(l4b);
            mv.visitIincInsn(index, 1); // i++;

            // Condition
            mv.visitLabel(l2b);
            mv.visitVarInsn(ILOAD, index);
            mv.visitVarInsn(ALOAD, 0);
            mv.visitFieldInsn(GETFIELD, className, delegator.getName(),
                    "[L" + delegator.getSpecification().getName().replace('.', '/') + ";");
            mv.visitInsn(ARRAYLENGTH);
            mv.visitJumpInsn(IF_ICMPLT, l3b);

            Label l5b = new Label();
            mv.visitLabel(l5b);
            mv.visitInsn(RETURN);
        }
    } else {
        mv.visitVarInsn(ALOAD, 0);
        mv.visitFieldInsn(GETFIELD, className, delegator.getName(),
                "L" + delegator.getSpecification().getName().replace('.', '/') + ";");

        loadArgs(mv, ACC_PUBLIC, Type.getArgumentTypes(desc));

        // Invoke
        if (delegator.getSpecification().isInterface()) {
            mv.visitMethodInsn(INVOKEINTERFACE, delegator.getSpecification().getName().replace('.', '/'), name,
                    desc);
        } else {
            mv.visitMethodInsn(INVOKEVIRTUAL, delegator.getSpecification().getName().replace('.', '/'), name,
                    desc);
        }

        // Return
        mv.visitInsn(Type.getReturnType(desc).getOpcode(IRETURN));
    }

    mv.visitMaxs(0, 0);
    mv.visitEnd();
}

From source file:org.apache.felix.ipojo.composite.service.provides.POJOWriter.java

License:Apache License

/**
 * Generate Optional Case for aggregate field.
 * @param mv : method visitor/*  w  w  w .j  a v a2s .com*/
 * @param delegator : Field on which delegate
 * @param className : current class name
 */
private static void generateOptionalAggregateCase(MethodVisitor mv, FieldMetadata delegator, String className) {
    mv.visitVarInsn(ALOAD, 0);
    mv.visitFieldInsn(GETFIELD, className, delegator.getName(),
            "[L" + delegator.getSpecification().getName().replace('.', '/') + ";");
    mv.visitInsn(ARRAYLENGTH);
    Label l1a = new Label();
    mv.visitJumpInsn(IFNE, l1a);
    Label l2a = new Label();
    mv.visitLabel(l2a);
    mv.visitTypeInsn(NEW, "java/lang/UnsupportedOperationException");
    mv.visitInsn(DUP);
    mv.visitLdcInsn("Operation not supported");
    mv.visitMethodInsn(INVOKESPECIAL, "java/lang/UnsupportedOperationException", "<init>",
            "(Ljava/lang/String;)V");
    mv.visitInsn(ATHROW);
    mv.visitLabel(l1a);
}

From source file:org.apache.felix.ipojo.composite.service.provides.POJOWriter.java

License:Apache License

/**
 * Generate Optional case for non aggregate fields.
 * /*  w w  w.  j a  v  a  2s .  c o  m*/
 * @param mv : the method visitor
 * @param delegator : the field on which delegate.
 * @param className : the name of the current class.
 */
private static void generateOptionalCase(MethodVisitor mv, FieldMetadata delegator, String className) {
    mv.visitVarInsn(ALOAD, 0);
    mv.visitFieldInsn(GETFIELD, className, delegator.getName(),
            "L" + delegator.getSpecification().getName().replace('.', '/') + ";");
    mv.visitTypeInsn(INSTANCEOF, "org/apache/felix/ipojo/Nullable");
    Label end = new Label();
    mv.visitJumpInsn(IFEQ, end);
    Label begin = new Label();
    mv.visitLabel(begin);
    mv.visitTypeInsn(NEW, "java/lang/UnsupportedOperationException");
    mv.visitInsn(DUP);
    mv.visitLdcInsn("Operation not supported");
    mv.visitMethodInsn(INVOKESPECIAL, "java/lang/UnsupportedOperationException", "<init>",
            "(Ljava/lang/String;)V");
    mv.visitInsn(ATHROW);
    mv.visitLabel(end);
}

From source file:org.apache.felix.ipojo.manipulation.ClassManipulator.java

License:Apache License

/**
 * Create the setter method for the __cm field.
 *//*  www.  j  av  a 2 s  .  com*/
private void createSetInstanceManagerMethod() {
    MethodVisitor mv = cv.visitMethod(ACC_PRIVATE, "_setInstanceManager",
            "(Lorg/apache/felix/ipojo/InstanceManager;)V", null, null);
    mv.visitCode();

    // If the given instance manager is null, just returns.
    mv.visitVarInsn(ALOAD, 1);
    Label l1 = new Label();
    mv.visitJumpInsn(IFNONNULL, l1);
    mv.visitInsn(RETURN);
    mv.visitLabel(l1);

    mv.visitVarInsn(ALOAD, 0);
    mv.visitVarInsn(ALOAD, 1);
    mv.visitFieldInsn(PUTFIELD, m_owner, IM_FIELD, "Lorg/apache/felix/ipojo/InstanceManager;");

    mv.visitVarInsn(ALOAD, 0);
    mv.visitFieldInsn(GETFIELD, m_owner, IM_FIELD, "Lorg/apache/felix/ipojo/InstanceManager;");
    mv.visitMethodInsn(INVOKEVIRTUAL, "org/apache/felix/ipojo/InstanceManager", "getRegistredFields",
            "()Ljava/util/Set;", false);
    mv.visitVarInsn(ASTORE, 2);

    mv.visitVarInsn(ALOAD, 2);
    Label endif = new Label();
    mv.visitJumpInsn(IFNULL, endif);
    for (String field : m_fields) {
        mv.visitVarInsn(ALOAD, 2);
        mv.visitLdcInsn(field);
        mv.visitMethodInsn(INVOKEINTERFACE, "java/util/Set", "contains", "(Ljava/lang/Object;)Z", true);
        Label l3 = new Label();
        mv.visitJumpInsn(IFEQ, l3);
        mv.visitVarInsn(ALOAD, 0);
        mv.visitInsn(ICONST_1);
        mv.visitFieldInsn(PUTFIELD, m_owner, FIELD_FLAG_PREFIX + field, "Z");
        mv.visitLabel(l3);
    }
    mv.visitLabel(endif);

    mv.visitVarInsn(ALOAD, 0);
    mv.visitFieldInsn(GETFIELD, m_owner, IM_FIELD, "Lorg/apache/felix/ipojo/InstanceManager;");
    mv.visitMethodInsn(INVOKEVIRTUAL, "org/apache/felix/ipojo/InstanceManager", "getRegistredMethods",
            "()Ljava/util/Set;", false);
    mv.visitVarInsn(ASTORE, 2);

    mv.visitVarInsn(ALOAD, 2);
    Label endif2 = new Label();
    mv.visitJumpInsn(IFNULL, endif2);

    for (String methodId : m_methods) {
        if (!methodId.equals("<init>")) {
            mv.visitVarInsn(ALOAD, 2);
            mv.visitLdcInsn(methodId);
            mv.visitMethodInsn(INVOKEINTERFACE, "java/util/Set", "contains", "(Ljava/lang/Object;)Z", true);
            Label l3 = new Label();
            mv.visitJumpInsn(IFEQ, l3);
            mv.visitVarInsn(ALOAD, 0);
            mv.visitInsn(ICONST_1);
            mv.visitFieldInsn(PUTFIELD, m_owner, METHOD_FLAG_PREFIX + methodId, "Z");
            mv.visitLabel(l3);
        }
    }

    mv.visitLabel(endif2);
    mv.visitInsn(RETURN);

    mv.visitMaxs(0, 0);
    mv.visitEnd();
}

From source file:org.apache.felix.ipojo.manipulation.ClassManipulator.java

License:Apache License

/**
 * Create a getter method for an array./*from   w w  w.j  av  a 2 s  .c  o m*/
 * @param name : field name
 * @param desc : method description
 */
private void createArraySetter(String name, String desc) {
    MethodVisitor mv = cv.visitMethod(0, "__set" + name, desc, null, null);
    mv.visitCode();

    String internalType = desc.substring(1);
    internalType = internalType.substring(0, internalType.length() - 2);

    Label l1 = new Label();
    mv.visitLabel(l1);
    mv.visitVarInsn(ALOAD, 0);
    mv.visitFieldInsn(GETFIELD, m_owner, FIELD_FLAG_PREFIX + name, "Z");
    Label l2 = new Label();
    mv.visitJumpInsn(IFNE, l2);

    mv.visitVarInsn(ALOAD, 0);
    mv.visitVarInsn(ALOAD, 1);
    mv.visitFieldInsn(PUTFIELD, m_owner, name, internalType);
    mv.visitInsn(RETURN);
    mv.visitLabel(l2);

    mv.visitVarInsn(ALOAD, 0);
    mv.visitFieldInsn(GETFIELD, m_owner, IM_FIELD, "Lorg/apache/felix/ipojo/InstanceManager;");
    mv.visitVarInsn(ALOAD, 0);
    mv.visitLdcInsn(name);
    mv.visitVarInsn(ALOAD, 1);
    mv.visitMethodInsn(INVOKEVIRTUAL, "org/apache/felix/ipojo/InstanceManager", SET,
            "(Ljava/lang/Object;Ljava/lang/String;Ljava/lang/Object;)V", false);

    mv.visitInsn(RETURN);

    // End
    mv.visitMaxs(0, 0);
    mv.visitEnd();
}

From source file:org.apache.felix.ipojo.manipulation.ClassManipulator.java

License:Apache License

/**
 * Create a setter method for an array./*from w  ww. ja v a  2 s . c om*/
 * @param name : field name
 * @param desc : method description
 */
private void createArrayGetter(String name, String desc) {
    String methodName = "__get" + name;
    MethodVisitor mv = cv.visitMethod(0, methodName, desc, null, null);
    mv.visitCode();

    String internalType = desc.substring(2);

    mv.visitVarInsn(ALOAD, 0);
    mv.visitFieldInsn(GETFIELD, m_owner, FIELD_FLAG_PREFIX + name, "Z");
    Label l1 = new Label();
    mv.visitJumpInsn(IFNE, l1);
    mv.visitVarInsn(ALOAD, 0);
    mv.visitFieldInsn(GETFIELD, m_owner, name, internalType);
    mv.visitInsn(ARETURN);
    mv.visitLabel(l1);

    mv.visitVarInsn(ALOAD, 0);
    mv.visitFieldInsn(GETFIELD, m_owner, IM_FIELD, "Lorg/apache/felix/ipojo/InstanceManager;");
    mv.visitVarInsn(ALOAD, 0);
    mv.visitLdcInsn(name);
    mv.visitMethodInsn(INVOKEVIRTUAL, "org/apache/felix/ipojo/InstanceManager", GET,
            "(Ljava/lang/Object;Ljava/lang/String;)Ljava/lang/Object;", false);
    mv.visitTypeInsn(CHECKCAST, internalType);
    mv.visitInsn(ARETURN);

    // End
    mv.visitMaxs(0, 0);
    mv.visitEnd();
}