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}).

        mv.visitLineNumber(64, l2);
        mv.visitVarInsn(ALOAD, 0);
        mv.visitTypeInsn(NEW, collectionImplClass);
        mv.visitInsn(DUP);
        mv.visitMethodInsn(INVOKESPECIAL, collectionImplClass, "<init>", "()V");
        mv.visitFieldInsn(PUTFIELD, classDescriptor, fieldName, propClassSignature);
        mv.visitLabel(l1);
        mv.visitLineNumber(66, l1);
        mv.visitVarInsn(ALOAD, 0);
        mv.visitFieldInsn(GETFIELD, classDescriptor, fieldName, propClassSignature);
        mv.visitInsn(ARETURN);

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        mv.visitMethodInsn(INVOKESPECIAL, collectionImplClass, "<init>", "()V");
        mv.visitFieldInsn(PUTFIELD, classDescriptor, fieldName, propClassSignature);
        mv.visitLabel(l1);
        mv.visitLineNumber(66, l1);
        mv.visitVarInsn(ALOAD, 0);
        mv.visitFieldInsn(GETFIELD, classDescriptor, fieldName, propClassSignature);
        mv.visitInsn(ARETURN);
        Label l3 = new Label();
        mv.visitLabel(l3);
        mv.visitLocalVariable("this", classSignature, null, l0, l3, 0);
        mv.visitMaxs(3, 1);

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        MethodVisitor mv = cw.visitMethod(modifiers, methodName, desc, null,
                exceptions);
        mv.visitCode();


        mv.visitVarInsn(ALOAD, 0);
        mv.visitFieldInsn(GETFIELD, className, DEPENDENCY, DEPENDENCY_DESC);  // The dependency is on the stack.
        mv.visitMethodInsn(INVOKEVIRTUAL, DEPENDENCY_INTERNAL_NAME, "getService", // Call getService
                "()Ljava/lang/Object;"); // The service object is on the stack.
        int varSvc = freeRoom;
        freeRoom = freeRoom + 1; // Object Reference.
        mv.visitVarInsn(ASTORE, varSvc); // Store the service object.

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        mv.visitVarInsn(ALOAD, 0); // Load this
        mv.visitInsn(DUP); // Dup
        mv.visitMethodInsn(INVOKESPECIAL, parent, "<init>", "()V"); // Call  super
        mv.visitVarInsn(ALOAD, 1); // Load the argument
        mv.visitFieldInsn(PUTFIELD, className, DEPENDENCY, DEPENDENCY_DESC); // Assign the dependency field
        mv.visitInsn(RETURN); // Return void


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

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        Label l1 = new Label();
        mv.visitLabel(l1);
        mv.visitLineNumber(31, l1);
        mv.visitVarInsn(Opcodes.ALOAD, 0);
        mv.visitVarInsn(Opcodes.ALOAD, 1);
        mv.visitFieldInsn(Opcodes.PUTFIELD, "org/apache/cxf/jaxb/NamespaceMapperInternal",
                          "nspref", "Ljava/util/Map;");
        Label l2 = new Label();
        mv.visitLabel(l2);
        mv.visitLineNumber(32, l2);
        mv.visitInsn(Opcodes.RETURN);

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        mv.visitCode();
        l0 = new Label();
        mv.visitLabel(l0);
        mv.visitLineNumber(38, l0);
        mv.visitVarInsn(Opcodes.ALOAD, 0);
        mv.visitFieldInsn(Opcodes.GETFIELD, 
                          "org/apache/cxf/jaxb/NamespaceMapperInternal", 
                          "nspref", "Ljava/util/Map;");
        mv.visitVarInsn(Opcodes.ALOAD, 1);
        mv.visitMethodInsn(Opcodes.INVOKEINTERFACE, "java/util/Map", 
                           "get", "(Ljava/lang/Object;)Ljava/lang/Object;");

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        {
        mv = cw.visitMethod(ACC_PUBLIC, "setAccessibleField", "(Ljava/lang/Object;Ljava/lang/Object;I)V", null, null);
        mv.visitCode();
        // rule.setAccessibleField(owner, value, fieldIndex);
        mv.visitVarInsn(ALOAD, 0);
        mv.visitFieldInsn(GETFIELD, compiledHelperName, "rule", "Lorg/jboss/byteman/rule/Rule;");
        mv.visitVarInsn(ALOAD, 1);
        mv.visitVarInsn(ALOAD, 2);
        mv.visitVarInsn(ILOAD, 3);
        mv.visitMethodInsn(INVOKEVIRTUAL, "org/jboss/byteman/rule/Rule", "setAccessibleField", "(Ljava/lang/Object;Ljava/lang/Object;I)V");
        // return

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        {
        mv = cw.visitMethod(ACC_PUBLIC, "invokeAccessibleMethod", "(Ljava/lang/Object;[Ljava/lang/Object;I)Ljava/lang/Object;", null, null);
        mv.visitCode();
        // rule.invokeAccessibleMethod(target, args, fieldIndex);
        mv.visitVarInsn(ALOAD, 0);
        mv.visitFieldInsn(GETFIELD, compiledHelperName, "rule", "Lorg/jboss/byteman/rule/Rule;");
        mv.visitVarInsn(ALOAD, 1);
        mv.visitVarInsn(ALOAD, 2);
        mv.visitVarInsn(ILOAD, 3);
        mv.visitMethodInsn(INVOKEVIRTUAL, "org/jboss/byteman/rule/Rule", "invokeAccessibleMethod", "(Ljava/lang/Object;[Ljava/lang/Object;I)Ljava/lang/Object;");
            // return {TOS}

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            // private void bind()
            mv = cw.visitMethod(ACC_PRIVATE, "bind", "()V", null, new String[] { "org/jboss/byteman/rule/exception/ExecuteException" });
            mv.visitCode();
            // rule.getEvent().interpret(this);
            mv.visitVarInsn(ALOAD, 0);
            mv.visitFieldInsn(GETFIELD, compiledHelperName, "rule", "Lorg/jboss/byteman/rule/Rule;");
            mv.visitMethodInsn(INVOKEVIRTUAL, "org/jboss/byteman/rule/Rule", "getEvent", "()Lorg/jboss/byteman/rule/Event;");
            mv.visitVarInsn(ALOAD, 0);
            mv.visitMethodInsn(INVOKEVIRTUAL, "org/jboss/byteman/rule/Event", "interpret", "(Lorg/jboss/byteman/rule/helper/HelperAdapter;)Ljava/lang/Object;");
            mv.visitInsn(RETURN);
            mv.visitMaxs(2, 1);

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            // private boolean test()
            mv = cw.visitMethod(ACC_PRIVATE, "test", "()Z", null, new String[] { "org/jboss/byteman/rule/exception/ExecuteException" });
            mv.visitCode();
            // {TOS} <== rule.getCondition().interpret(this);
            mv.visitVarInsn(ALOAD, 0);
            mv.visitFieldInsn(GETFIELD, compiledHelperName, "rule", "Lorg/jboss/byteman/rule/Rule;");
            mv.visitMethodInsn(INVOKEVIRTUAL, "org/jboss/byteman/rule/Rule", "getCondition", "()Lorg/jboss/byteman/rule/Condition;");
            mv.visitVarInsn(ALOAD, 0);
            mv.visitMethodInsn(INVOKEVIRTUAL, "org/jboss/byteman/rule/Condition", "interpret", "(Lorg/jboss/byteman/rule/helper/HelperAdapter;)Ljava/lang/Object;");
            mv.visitTypeInsn(Opcodes.CHECKCAST, "java/lang/Boolean");
            // unbox the returned Boolean

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