Example usage for org.objectweb.asm MethodVisitor visitCode

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

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Introduction

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

Prototype

public void visitCode()

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Document

Starts the visit of the method's code, if any (i.e.

Usage

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

License:Apache License

/**
 * Create the setter method for one property. The name of the method is _set+name of the field
 * @param name : name of the field representing a property
 * @param desc : description of the setter method
 * @param type : type of the property/*from w  w  w .ja v a2 s.c o  m*/
 */
private void createSimpleSetter(String name, String desc, Type type) {
    MethodVisitor mv = cv.visitMethod(0, "__set" + name, desc, null, null);
    mv.visitCode();

    switch (type.getSort()) {
    case Type.BOOLEAN:
    case Type.CHAR:
    case Type.BYTE:
    case Type.SHORT:
    case Type.INT:
    case Type.FLOAT:
        String internalName = ManipulationProperty.PRIMITIVE_BOXING_INFORMATION[type.getSort()][0];
        String boxingType = ManipulationProperty.PRIMITIVE_BOXING_INFORMATION[type.getSort()][1];

        Label l1 = new Label();
        mv.visitLabel(l1);

        mv.visitVarInsn(ALOAD, 0);
        mv.visitFieldInsn(GETFIELD, m_owner, FIELD_FLAG_PREFIX + name, "Z");
        Label l22 = new Label();
        mv.visitJumpInsn(IFNE, l22);

        mv.visitVarInsn(ALOAD, 0);
        mv.visitVarInsn(type.getOpcode(ILOAD), 1);
        mv.visitFieldInsn(PUTFIELD, m_owner, name, internalName);
        mv.visitInsn(RETURN);
        mv.visitLabel(l22);

        mv.visitTypeInsn(NEW, boxingType);
        mv.visitInsn(DUP);
        mv.visitVarInsn(type.getOpcode(ILOAD), 1);
        mv.visitMethodInsn(INVOKESPECIAL, boxingType, "<init>", "(" + internalName + ")V", false);
        mv.visitVarInsn(ASTORE, 2);

        Label l2 = new Label();
        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, 2);
        mv.visitMethodInsn(INVOKEVIRTUAL, "org/apache/felix/ipojo/InstanceManager", SET,
                "(Ljava/lang/Object;Ljava/lang/String;Ljava/lang/Object;)V", false);

        Label l3 = new Label();
        mv.visitLabel(l3);
        mv.visitInsn(RETURN);
        break;

    case Type.LONG:
    case Type.DOUBLE:
        internalName = ManipulationProperty.PRIMITIVE_BOXING_INFORMATION[type.getSort()][0];
        boxingType = ManipulationProperty.PRIMITIVE_BOXING_INFORMATION[type.getSort()][1];

        l1 = new Label();
        mv.visitLabel(l1);

        mv.visitVarInsn(ALOAD, 0);
        mv.visitFieldInsn(GETFIELD, m_owner, FIELD_FLAG_PREFIX + name, "Z");
        Label l23 = new Label();
        mv.visitJumpInsn(IFNE, l23);

        mv.visitVarInsn(ALOAD, 0);
        mv.visitVarInsn(type.getOpcode(ILOAD), 1);
        mv.visitFieldInsn(PUTFIELD, m_owner, name, internalName);
        mv.visitInsn(RETURN);
        mv.visitLabel(l23);

        mv.visitTypeInsn(NEW, boxingType);
        mv.visitInsn(DUP);
        mv.visitVarInsn(type.getOpcode(ILOAD), 1);
        mv.visitMethodInsn(INVOKESPECIAL, boxingType, "<init>", "(" + internalName + ")V", false);
        mv.visitVarInsn(ASTORE, 3); // Double space

        l2 = new Label();
        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, 3);
        mv.visitMethodInsn(INVOKEVIRTUAL, "org/apache/felix/ipojo/InstanceManager", SET,
                "(Ljava/lang/Object;Ljava/lang/String;Ljava/lang/Object;)V", false);

        l3 = new Label();
        mv.visitLabel(l3);
        mv.visitInsn(RETURN);
        break;

    case Type.OBJECT:
        mv.visitVarInsn(ALOAD, 0);
        mv.visitFieldInsn(GETFIELD, m_owner, FIELD_FLAG_PREFIX + name, "Z");
        Label l24 = new Label();
        mv.visitJumpInsn(IFNE, l24);

        mv.visitVarInsn(ALOAD, 0);
        mv.visitVarInsn(ALOAD, 1);
        mv.visitFieldInsn(PUTFIELD, m_owner, name, "L" + type.getInternalName() + ";");
        mv.visitInsn(RETURN);
        mv.visitLabel(l24);

        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);
        break;
    default:
        ManipulationProperty.getLogger().log(ManipulationProperty.SEVERE,
                "Manipulation Error : Cannot create the setter method for the field : " + name + " (" + type
                        + ")");
        break;
    }

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

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

License:Apache License

/**
 * Create a constructor to call the manipulated constructor.
 * This constructor does not have any argument. It will call the manipulated
 * constructor with a null instance manager.
 * @param access : access flag//from  www.  ja  v a 2  s.c o m
 * @param signature : method signature
 * @param exceptions : declared exception
 * @param annotations : the annotations to move to this constructor.
 */
private void generateEmptyConstructor(int access, String signature, String[] exceptions, List annotations) {
    MethodVisitor mv = cv.visitMethod(access, "<init>", "()V", signature, exceptions);
    mv.visitCode();
    mv.visitVarInsn(ALOAD, 0);
    mv.visitInsn(ACONST_NULL);
    mv.visitMethodInsn(INVOKESPECIAL, m_owner, "<init>", "(Lorg/apache/felix/ipojo/InstanceManager;)V");
    mv.visitInsn(RETURN);

    // Move annotations
    if (annotations != null) {
        for (int i = 0; i < annotations.size(); i++) {
            AnnotationDescriptor ad = (AnnotationDescriptor) annotations.get(i);
            ad.visitAnnotation(mv);
        }
    }

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

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

License:Apache License

/**
 * Create a constructor to call the manipulated constructor.
 * This constructor has one argument (the bundle context). It will call the manipulated
 * constructor with a null instance manager.
 * @param access : access flag//from  w  ww.  j a  va  2s . co m
 * @param signature : method signature
 * @param exceptions : declared exception
 * @param annotations : the annotations to move to this constructor.
 */
private void generateBCConstructor(int access, String signature, String[] exceptions, List annotations) {
    MethodVisitor mv = cv.visitMethod(access, "<init>", "(Lorg/osgi/framework/BundleContext;)V", signature,
            exceptions);
    mv.visitCode();
    Label l0 = new Label();
    mv.visitLabel(l0);
    mv.visitVarInsn(ALOAD, 0);
    mv.visitInsn(ACONST_NULL);
    mv.visitVarInsn(ALOAD, 1);
    mv.visitMethodInsn(INVOKESPECIAL, m_owner, "<init>",
            "(Lorg/apache/felix/ipojo/InstanceManager;Lorg/osgi/framework/BundleContext;)V");
    mv.visitInsn(RETURN);

    // Move annotations
    if (annotations != null) {
        for (int i = 0; i < annotations.size(); i++) {
            AnnotationDescriptor ad = (AnnotationDescriptor) annotations.get(i);
            ad.visitAnnotation(mv);
        }
    }

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

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

License:Apache License

/**
 * Creates a simple constructor with an instance manager
 * in argument if no suitable constructor is found during
 * the visit./*from  w w w .  java2  s  .c  o m*/
 */
private void createSimpleConstructor() {
    MethodVisitor mv = cv.visitMethod(ACC_PUBLIC, "<init>", "(Lorg/apache/felix/ipojo/InstanceManager;)V", null,
            null);
    mv.visitCode();

    // Super call
    mv.visitVarInsn(ALOAD, 0);
    mv.visitMethodInsn(INVOKESPECIAL, m_superclass, "<init>", "()V");

    // Call set instance manager
    mv.visitVarInsn(ALOAD, 0);
    mv.visitVarInsn(ALOAD, 1);
    mv.visitMethodInsn(INVOKEVIRTUAL, m_owner, "_setInstanceManager",
            "(Lorg/apache/felix/ipojo/InstanceManager;)V");

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

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

License:Apache License

/**
 * Create the setter method for the __cm field.
 *//*from ww  w.  ja v  a  2  s  .co m*/
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;");
    mv.visitVarInsn(ASTORE, 2);

    mv.visitVarInsn(ALOAD, 2);
    Label endif = new Label();
    mv.visitJumpInsn(IFNULL, endif);
    Iterator it = m_fields.iterator();
    while (it.hasNext()) {
        String field = (String) it.next();
        mv.visitVarInsn(ALOAD, 2);
        mv.visitLdcInsn(field);
        mv.visitMethodInsn(INVOKEINTERFACE, "java/util/Set", "contains", "(Ljava/lang/Object;)Z");
        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;");
    mv.visitVarInsn(ASTORE, 2);

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

    for (int i = 0; i < m_methods.size(); i++) {
        String methodId = (String) m_methods.get(i);
        if (!methodId.equals("<init>")) {
            mv.visitVarInsn(ALOAD, 2);
            mv.visitLdcInsn(methodId);
            mv.visitMethodInsn(INVOKEINTERFACE, "java/util/Set", "contains", "(Ljava/lang/Object;)Z");
            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.MethodCreator.java

License:Apache License

/**
 * Create a getter method for an array./*  www  . ja  va 2  s  .c  om*/
 * @param name : field name
 * @param desc : method description
 * @param type : contained type (inside the array)
 */
private void createArraySetter(String name, String desc, Type type) {
    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");

    mv.visitInsn(RETURN);

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

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

License:Apache License

/**
 * Create a setter method for an array./*from  w  w  w.java  2s . com*/
 * @param name : field name
 * @param desc : method description
 * @param type : contained type (inside the array)
 */
private void createArrayGetter(String name, String desc, Type type) {
    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;");
    mv.visitTypeInsn(CHECKCAST, internalType);
    mv.visitInsn(ARETURN);

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

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

License:Apache License

/**
 * Create the getter for a field./*  w  w  w.ja v  a 2s  . co m*/
 * @param name : field of the dependency
 * @param desc : description of the getter method
 * @param type : type to return
 */
private void createSimpleGetter(String name, String desc, Type type) {
    String methodName = "__get" + name;
    MethodVisitor mv = cv.visitMethod(0, methodName, desc, null, null);
    mv.visitCode();

    switch (type.getSort()) {
    case Type.BOOLEAN:
    case Type.CHAR:
    case Type.BYTE:
    case Type.SHORT:
    case Type.INT:

        String internalName = ManipulationProperty.PRIMITIVE_BOXING_INFORMATION[type.getSort()][0];
        String boxingType = ManipulationProperty.PRIMITIVE_BOXING_INFORMATION[type.getSort()][1];
        String unboxingMethod = ManipulationProperty.PRIMITIVE_BOXING_INFORMATION[type.getSort()][2];

        Label l0 = new Label();
        mv.visitLabel(l0);

        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, internalName);
        mv.visitInsn(IRETURN);

        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;");
        mv.visitVarInsn(ASTORE, 1);

        mv.visitVarInsn(ALOAD, 1);
        mv.visitTypeInsn(CHECKCAST, boxingType);
        mv.visitVarInsn(ASTORE, 2);

        mv.visitVarInsn(ALOAD, 2);
        mv.visitMethodInsn(INVOKEVIRTUAL, boxingType, unboxingMethod, "()" + internalName);
        mv.visitInsn(type.getOpcode(IRETURN));
        break;

    case Type.LONG:
        internalName = ManipulationProperty.PRIMITIVE_BOXING_INFORMATION[type.getSort()][0];
        boxingType = ManipulationProperty.PRIMITIVE_BOXING_INFORMATION[type.getSort()][1];
        unboxingMethod = ManipulationProperty.PRIMITIVE_BOXING_INFORMATION[type.getSort()][2];

        l0 = new Label();
        mv.visitLabel(l0);
        mv.visitVarInsn(ALOAD, 0);
        mv.visitFieldInsn(GETFIELD, m_owner, FIELD_FLAG_PREFIX + name, "Z");
        l1 = new Label();
        mv.visitJumpInsn(IFNE, l1);
        mv.visitVarInsn(ALOAD, 0);
        mv.visitFieldInsn(GETFIELD, m_owner, name, internalName);
        mv.visitInsn(LRETURN);
        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;");
        mv.visitVarInsn(ASTORE, 1);

        mv.visitVarInsn(ALOAD, 1);
        mv.visitTypeInsn(CHECKCAST, boxingType);
        mv.visitVarInsn(ASTORE, 2);

        mv.visitVarInsn(ALOAD, 2);
        mv.visitMethodInsn(INVOKEVIRTUAL, boxingType, unboxingMethod, "()" + internalName);
        mv.visitInsn(LRETURN);

        break;

    case Type.DOUBLE:
        internalName = ManipulationProperty.PRIMITIVE_BOXING_INFORMATION[type.getSort()][0];
        boxingType = ManipulationProperty.PRIMITIVE_BOXING_INFORMATION[type.getSort()][1];
        unboxingMethod = ManipulationProperty.PRIMITIVE_BOXING_INFORMATION[type.getSort()][2];

        l0 = new Label();
        mv.visitLabel(l0);
        mv.visitVarInsn(ALOAD, 0);
        mv.visitFieldInsn(GETFIELD, m_owner, FIELD_FLAG_PREFIX + name, "Z");
        l1 = new Label();
        mv.visitJumpInsn(IFNE, l1);
        mv.visitVarInsn(ALOAD, 0);
        mv.visitFieldInsn(GETFIELD, m_owner, name, internalName);
        mv.visitInsn(DRETURN);
        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;");
        mv.visitVarInsn(ASTORE, 1);

        mv.visitVarInsn(ALOAD, 1);
        mv.visitTypeInsn(CHECKCAST, boxingType);
        mv.visitVarInsn(ASTORE, 2);

        mv.visitVarInsn(ALOAD, 2);
        mv.visitMethodInsn(INVOKEVIRTUAL, boxingType, unboxingMethod, "()" + internalName);
        mv.visitInsn(DRETURN);

        break;

    case Type.FLOAT:
        internalName = ManipulationProperty.PRIMITIVE_BOXING_INFORMATION[type.getSort()][0];
        boxingType = ManipulationProperty.PRIMITIVE_BOXING_INFORMATION[type.getSort()][1];
        unboxingMethod = ManipulationProperty.PRIMITIVE_BOXING_INFORMATION[type.getSort()][2];

        l0 = new Label();
        mv.visitLabel(l0);
        mv.visitVarInsn(ALOAD, 0);
        mv.visitFieldInsn(GETFIELD, m_owner, FIELD_FLAG_PREFIX + name, "Z");
        l1 = new Label();
        mv.visitJumpInsn(IFNE, l1);
        mv.visitVarInsn(ALOAD, 0);
        mv.visitFieldInsn(GETFIELD, m_owner, name, internalName);
        mv.visitInsn(FRETURN);
        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;");
        mv.visitVarInsn(ASTORE, 1);

        mv.visitVarInsn(ALOAD, 1);
        mv.visitTypeInsn(CHECKCAST, boxingType);
        mv.visitVarInsn(ASTORE, 2);

        mv.visitVarInsn(ALOAD, 2);
        mv.visitMethodInsn(INVOKEVIRTUAL, boxingType, unboxingMethod, "()" + internalName);
        mv.visitInsn(FRETURN);

        break;

    case Type.OBJECT:
        l0 = new Label();
        mv.visitLabel(l0);
        mv.visitVarInsn(ALOAD, 0);
        mv.visitFieldInsn(GETFIELD, m_owner, FIELD_FLAG_PREFIX + name, "Z");
        l1 = new Label();
        mv.visitJumpInsn(IFNE, l1);
        mv.visitVarInsn(ALOAD, 0);
        mv.visitFieldInsn(GETFIELD, m_owner, name, "L" + type.getInternalName() + ";");
        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;");
        mv.visitTypeInsn(CHECKCAST, type.getInternalName());
        mv.visitInsn(ARETURN);

        break;

    default:
        ManipulationProperty.getLogger().log(ManipulationProperty.SEVERE,
                "Manipulation problem in " + m_owner + " : a type is not implemented : " + type);
        break;
    }

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

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

License:Apache License

/**
 * Create the setter method for one property. The name of the method is _set+name of the field
 * @param name : name of the field representing a property
 * @param desc : description of the setter method
 * @param type : type of the property/* w  w  w . j a v  a2s  .  c  o m*/
 */
private void createSimpleSetter(String name, String desc, Type type) {
    MethodVisitor mv = cv.visitMethod(0, "__set" + name, desc, null, null);
    mv.visitCode();

    switch (type.getSort()) {
    case Type.BOOLEAN:
    case Type.CHAR:
    case Type.BYTE:
    case Type.SHORT:
    case Type.INT:
    case Type.FLOAT:
        String internalName = ManipulationProperty.PRIMITIVE_BOXING_INFORMATION[type.getSort()][0];
        String boxingType = ManipulationProperty.PRIMITIVE_BOXING_INFORMATION[type.getSort()][1];

        Label l1 = new Label();
        mv.visitLabel(l1);

        mv.visitVarInsn(ALOAD, 0);
        mv.visitFieldInsn(GETFIELD, m_owner, FIELD_FLAG_PREFIX + name, "Z");
        Label l22 = new Label();
        mv.visitJumpInsn(IFNE, l22);

        mv.visitVarInsn(ALOAD, 0);
        mv.visitVarInsn(type.getOpcode(ILOAD), 1);
        mv.visitFieldInsn(PUTFIELD, m_owner, name, internalName);
        mv.visitInsn(RETURN);
        mv.visitLabel(l22);

        mv.visitTypeInsn(NEW, boxingType);
        mv.visitInsn(DUP);
        mv.visitVarInsn(type.getOpcode(ILOAD), 1);
        mv.visitMethodInsn(INVOKESPECIAL, boxingType, "<init>", "(" + internalName + ")V");
        mv.visitVarInsn(ASTORE, 2);

        Label l2 = new Label();
        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, 2);
        mv.visitMethodInsn(INVOKEVIRTUAL, "org/apache/felix/ipojo/InstanceManager", SET,
                "(Ljava/lang/Object;Ljava/lang/String;Ljava/lang/Object;)V");

        Label l3 = new Label();
        mv.visitLabel(l3);
        mv.visitInsn(RETURN);
        break;

    case Type.LONG:
    case Type.DOUBLE:
        internalName = ManipulationProperty.PRIMITIVE_BOXING_INFORMATION[type.getSort()][0];
        boxingType = ManipulationProperty.PRIMITIVE_BOXING_INFORMATION[type.getSort()][1];

        l1 = new Label();
        mv.visitLabel(l1);

        mv.visitVarInsn(ALOAD, 0);
        mv.visitFieldInsn(GETFIELD, m_owner, FIELD_FLAG_PREFIX + name, "Z");
        Label l23 = new Label();
        mv.visitJumpInsn(IFNE, l23);

        mv.visitVarInsn(ALOAD, 0);
        mv.visitVarInsn(type.getOpcode(ILOAD), 1);
        mv.visitFieldInsn(PUTFIELD, m_owner, name, internalName);
        mv.visitInsn(RETURN);
        mv.visitLabel(l23);

        mv.visitTypeInsn(NEW, boxingType);
        mv.visitInsn(DUP);
        mv.visitVarInsn(type.getOpcode(ILOAD), 1);
        mv.visitMethodInsn(INVOKESPECIAL, boxingType, "<init>", "(" + internalName + ")V");
        mv.visitVarInsn(ASTORE, 3); // Double space

        l2 = new Label();
        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, 3);
        mv.visitMethodInsn(INVOKEVIRTUAL, "org/apache/felix/ipojo/InstanceManager", SET,
                "(Ljava/lang/Object;Ljava/lang/String;Ljava/lang/Object;)V");

        l3 = new Label();
        mv.visitLabel(l3);
        mv.visitInsn(RETURN);
        break;

    case Type.OBJECT:
        mv.visitVarInsn(ALOAD, 0);
        mv.visitFieldInsn(GETFIELD, m_owner, FIELD_FLAG_PREFIX + name, "Z");
        Label l24 = new Label();
        mv.visitJumpInsn(IFNE, l24);

        mv.visitVarInsn(ALOAD, 0);
        mv.visitVarInsn(ALOAD, 1);
        mv.visitFieldInsn(PUTFIELD, m_owner, name, "L" + type.getInternalName() + ";");
        mv.visitInsn(RETURN);
        mv.visitLabel(l24);

        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");

        mv.visitInsn(RETURN);
        break;
    default:
        ManipulationProperty.getLogger().log(ManipulationProperty.SEVERE,
                "Manipulation Error : Cannot create the setter method for the field : " + name + " (" + type
                        + ")");
        break;
    }

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

From source file:org.apache.pig.builtin.InvokerGenerator.java

License:Apache License

private byte[] generateInvokerFunctionBytecode(String className, Method method, boolean isStatic,
        Class<?>[] arguments) {
    boolean isInterface = method.getDeclaringClass().isInterface();

    ClassWriter cw = new ClassWriter(0);
    cw.visit(V1_6, ACC_PUBLIC + ACC_SUPER, className, null, "java/lang/Object",
            new String[] { "org/apache/pig/builtin/InvokerFunction" });

    makeConstructor(cw);/*  w  w  w. jav a2s  .  co m*/

    MethodVisitor mv = cw.visitMethod(ACC_PUBLIC, "eval", "(Lorg/apache/pig/data/Tuple;)Ljava/lang/Object;",
            null, new String[] { "java/io/IOException" });
    mv.visitCode();

    int next = 2;
    //this will get the arguments from the Tuple, cast them, and astore them
    int begin = 0;
    if (!isStatic)
        loadAndStoreArgument(mv, begin++, next++, getMethodStyleName(method.getDeclaringClass()));

    for (int i = 0; i < arguments.length; i++)
        loadAndStoreArgument(mv, i + begin, next++, getMethodStyleName(getObjectVersion(arguments[i])));

    //puts the arguments on the stack
    next = 2;

    if (!isStatic) {
        mv.visitVarInsn(ALOAD, next++); //put the method receiver on the stack
    }

    for (Class<?> arg : arguments) {
        mv.visitVarInsn(ALOAD, next++);
        unboxIfPrimitive(mv, arg);
    }
    String signature = buildSignatureString(arguments, method.getReturnType());
    mv.visitMethodInsn(isStatic ? INVOKESTATIC : isInterface ? INVOKEINTERFACE : INVOKEVIRTUAL,
            getMethodStyleName(method.getDeclaringClass()), method.getName(), signature);
    boxIfPrimitive(mv, method.getReturnType()); //TODO does this work?
    mv.visitInsn(ARETURN);
    mv.visitMaxs(2, (isStatic ? 2 : 3) + arguments.length);
    mv.visitEnd();

    cw.visitEnd();

    return cw.toByteArray();
}