Examples of org.objectweb.asm.MethodVisitor.visitFieldInsn()

org.objectweb.asm.MethodVisitor.visitFieldInsn()
Visits a field instruction. A field instruction is an instruction that loads or stores the value of a field of an object. @param opcode the opcode of the type instruction to be visited. Thisopcode is either GETSTATIC, PUTSTATIC, GETFIELD or PUTFIELD. @param owner the internal name of the field's owner class (see {@link Type#getInternalName() getInternalName}). @param name the field's name. @param desc the field's descriptor (see {@link Type Type}).

        // public Object getBinding(String name)
        mv = cw.visitMethod(ACC_PUBLIC, "getBinding", "(Ljava/lang/String;)Ljava/lang/Object;", null, null);
        mv.visitCode();
        // {TOS} <== bindingMap.get(name);
        mv.visitVarInsn(ALOAD, 0);
        mv.visitFieldInsn(GETFIELD, compiledHelperName, "bindingMap", "Ljava/util/HashMap;");
        mv.visitVarInsn(ALOAD, 1);
        mv.visitMethodInsn(INVOKEVIRTUAL, "java/util/HashMap", "get", "(Ljava/lang/Object;)Ljava/lang/Object;");
        // return {TOS}
        mv.visitInsn(ARETURN);
        mv.visitMaxs(2, 2);

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        // public String getName()
        mv = cw.visitMethod(ACC_PUBLIC, "getName", "()Ljava/lang/String;", null, null);
        mv.visitCode();
        // {TOS} <== rule.getName()
        mv.visitVarInsn(ALOAD, 0);
        mv.visitFieldInsn(GETFIELD, compiledHelperName, "rule", "Lorg/jboss/byteman/rule/Rule;");
        mv.visitMethodInsn(INVOKEVIRTUAL, "org/jboss/byteman/rule/Rule", "getName", "()Ljava/lang/String;");
        // return {TOS}
        mv.visitInsn(ARETURN);
        mv.visitMaxs(1, 1);
        mv.visitEnd();

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        {
        mv = cw.visitMethod(ACC_PUBLIC, "getAccessibleField", "(Ljava/lang/Object;I)Ljava/lang/Object;", null, null);
        mv.visitCode();
        // {TOS} <== rule.getAccessibleField(owner, fieldIndex);
        mv.visitVarInsn(ALOAD, 0);
        mv.visitFieldInsn(GETFIELD, compiledHelperName, "rule", "Lorg/jboss/byteman/rule/Rule;");
        mv.visitVarInsn(ALOAD, 1);
        mv.visitVarInsn(ILOAD, 2);
        mv.visitMethodInsn(INVOKEVIRTUAL, "org/jboss/byteman/rule/Rule", "getAccessibleField", "(Ljava/lang/Object;I)Ljava/lang/Object;");
        // return {TOS}
        mv.visitInsn(ARETURN);

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                           methodDescriptor,
                           signatureString,
                           getExceptionInternalNames(method));


        mv.visitCode();
        mv.visitFieldInsn(GETSTATIC, className, DELEGATE_FIELD, getSignature(interfaceName));
        Class<?>[] paramTypes = method.getParameterTypes();
        for (int i = 0; i < paramTypes.length; i++) {
            String signature = Type.getDescriptor(paramTypes[i]);
            mv.visitVarInsn(CodeGenerationHelper.getLoadOPCode(signature), i + 1);
        }

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                                          fieldDescriptor == null ? null : "()" + fieldDescriptor,
                                          null);
        mv.visitCode();


        mv.visitVarInsn(Opcodes.ALOAD, 0);
        mv.visitFieldInsn(Opcodes.GETFIELD, classFileName, fieldName, classCode);
        mv.visitInsn(org.objectweb.asm.Type.getType(classCode).getOpcode(Opcodes.IRETURN));
        mv.visitMaxs(0, 0);
        mv.visitEnd();
        
        methodName = JAXBUtils.nameToIdentifier(name, JAXBUtils.IdentifierType.SETTER);

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                            fieldDescriptor == null ? null : "(" + fieldDescriptor + ")V", null);
        mv.visitCode();
        mv.visitVarInsn(Opcodes.ALOAD, 0);
        org.objectweb.asm.Type setType = org.objectweb.asm.Type.getType(classCode);
        mv.visitVarInsn(setType.getOpcode(Opcodes.ILOAD), 1);
        mv.visitFieldInsn(Opcodes.PUTFIELD, className, fieldName, classCode);       
        mv.visitInsn(Opcodes.RETURN);
        mv.visitMaxs(0, 0);
        mv.visitEnd();


    }

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    Label l0 = new Label();
    mv.visitLabel(l0);
    mv.visitTypeInsn(NEW, "java/util/IdentityHashMap");
    mv.visitInsn(DUP);
    mv.visitMethodInsn(INVOKESPECIAL, "java/util/IdentityHashMap", "<init>", "()V");
    mv.visitFieldInsn(PUTSTATIC, owner, "$store", "Ljava/util/Map;");
    mv.visitInsn(RETURN);
    mv.visitEnd();
  }
  
  private void injectConstructor() {

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    mv.visitMethodInsn(INVOKESPECIAL, "com/artemis/PackedComponent", "<init>", "()V");
    Label l1 = new Label();
    mv.visitLabel(l1);
    mv.visitVarInsn(ALOAD, 0);
    mv.visitInsn(ACONST_NULL);
    mv.visitFieldInsn(PUTFIELD, typeName, "$data", "Ljava/nio/ByteBuffer;");
    Label l2 = new Label();
    mv.visitLabel(l2);
    mv.visitVarInsn(ALOAD, 0);
    mv.visitVarInsn(ALOAD, 1);
    mv.visitFieldInsn(PUTFIELD, typeName, "$world", "Lcom/artemis/World;");

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    mv.visitFieldInsn(PUTFIELD, typeName, "$data", "Ljava/nio/ByteBuffer;");
    Label l2 = new Label();
    mv.visitLabel(l2);
    mv.visitVarInsn(ALOAD, 0);
    mv.visitVarInsn(ALOAD, 1);
    mv.visitFieldInsn(PUTFIELD, typeName, "$world", "Lcom/artemis/World;");
    Label l3 = new Label();
    mv.visitLabel(l3);
    mv.visitFieldInsn(GETSTATIC, typeName, "$store", "Ljava/util/Map;");
    mv.visitVarInsn(ALOAD, 1);
    mv.visitMethodInsn(INVOKEINTERFACE, "java/util/Map", "get", "(Ljava/lang/Object;)Ljava/lang/Object;");

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    mv.visitVarInsn(ALOAD, 0);
    mv.visitVarInsn(ALOAD, 1);
    mv.visitFieldInsn(PUTFIELD, typeName, "$world", "Lcom/artemis/World;");
    Label l3 = new Label();
    mv.visitLabel(l3);
    mv.visitFieldInsn(GETSTATIC, typeName, "$store", "Ljava/util/Map;");
    mv.visitVarInsn(ALOAD, 1);
    mv.visitMethodInsn(INVOKEINTERFACE, "java/util/Map", "get", "(Ljava/lang/Object;)Ljava/lang/Object;");
    mv.visitTypeInsn(CHECKCAST, "com/artemis/utils/Bag");
    mv.visitVarInsn(ASTORE, 2);
    Label l4 = new Label();

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