Examples of org.objectweb.asm.CodeVisitor

org.objectweb.asm.CodeVisitor
A visitor to visit the bytecode instructions of a Java method. The methods of this visitor must be called in the sequential order of the bytecode instructions of the visited code. The {@link #visitMaxs visitMaxs} methodmust be called after all the instructions have been visited. The {@link #visitTryCatchBlock visitTryCatchBlock}, {@link #visitLocalVariable visitLocalVariable} and {@link #visitLineNumber visitLineNumber} methods maybe called in any order, at any time (provided the labels passed as arguments have already been visited with {@link #visitLabel visitLabel}). @author Eric Bruneton

        mv = cv.visitMethod(ACC_PUBLIC, "jdoReplaceField", "(I)V", null, null);
        generateThrowJDOUnsupportedOptionException(mv);
        mv.visitMaxs(0, 0);
    }
    private void generateJdoReplaceFieldAIMethod() {
        CodeVisitor mv;
        mv = cv.visitMethod(ACC_PUBLIC, "jdoReplaceField", "([I)V", null, null);
        generateThrowJDOUnsupportedOptionException(mv);
        mv.visitMaxs(0, 0);
    }

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        mv = cv.visitMethod(ACC_PUBLIC, "jdoReplaceField", "([I)V", null, null);
        generateThrowJDOUnsupportedOptionException(mv);
        mv.visitMaxs(0, 0);
    }
    private void generateJdoProvideFieldIMethod() {
        CodeVisitor mv;
        mv = cv.visitMethod(ACC_PUBLIC, "jdoProvideField", "(I)V", null, null);
        generateThrowJDOUnsupportedOptionException(mv);
        mv.visitMaxs(0, 0);
    }

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        mv = cv.visitMethod(ACC_PUBLIC, "jdoProvideField", "(I)V", null, null);
        generateThrowJDOUnsupportedOptionException(mv);
        mv.visitMaxs(0, 0);
    }
    private void generateJdoProvideFieldAIMethod() {
        CodeVisitor mv;
        mv = cv.visitMethod(ACC_PUBLIC, "jdoProvideField", "([I)V", null, null);
        generateThrowJDOUnsupportedOptionException(mv);
        mv.visitMaxs(0, 0);
    }

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        mv = cv.visitMethod(ACC_PUBLIC, "jdoProvideField", "([I)V", null, null);
        generateThrowJDOUnsupportedOptionException(mv);
        mv.visitMaxs(0, 0);
    }
    private void generateJdoCopyFieldsMethod() {
        CodeVisitor mv;
        mv = cv.visitMethod(ACC_PUBLIC, "jdoCopyFields", 
                "(Ljava/lang/Object;[I)V", null, null);
        generateThrowJDOUnsupportedOptionException(mv);
        mv.visitMaxs(0, 0);
    }

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                "(Ljava/lang/Object;[I)V", null, null);
        generateThrowJDOUnsupportedOptionException(mv);
        mv.visitMaxs(0, 0);
    }
    private void generateJdoCopyKeyFieldsToObjectIdOIFMMethod() {
        CodeVisitor mv;
        mv = cv.visitMethod(ACC_PUBLIC, "jdoCopyKeyFieldsToObjectId", 
                "(Ljavax/jdo/spi/PersistenceCapable$ObjectIdFieldManager;Ljava/lang/Object;)V", null, null);
        generateThrowJDOUnsupportedOptionException(mv);
        mv.visitMaxs(0, 0);
    }

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                "(Ljavax/jdo/spi/PersistenceCapable$ObjectIdFieldManager;Ljava/lang/Object;)V", null, null);
        generateThrowJDOUnsupportedOptionException(mv);
        mv.visitMaxs(0, 0);
    }
    private void generateJdoCopyKeyFieldsToObjectIdOMethod() {
        CodeVisitor mv;
        mv = cv.visitMethod(ACC_PUBLIC, "jdoCopyKeyFieldsToObjectId", 
                "(Ljava/lang/Object;)V", null, null);
        generateThrowJDOUnsupportedOptionException(mv);
        mv.visitMaxs(0, 0);
    }

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                "(Ljava/lang/Object;)V", null, null);
        generateThrowJDOUnsupportedOptionException(mv);
        mv.visitMaxs(0, 0);
    }
    private void generateJdoCopyKeyFieldsToObjectIdOIFSMethod() {
        CodeVisitor mv;
        mv = cv.visitMethod(ACC_PUBLIC, "jdoCopyKeyFieldsToObjectId", 
                "(Ljavax/jdo/spi/PersistenceCapable$ObjectIdFieldSupplier;Ljava/lang/Object;)V", null, null);
        generateThrowJDOUnsupportedOptionException(mv);
        mv.visitMaxs(0, 0);
    }

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                "(Ljavax/jdo/spi/PersistenceCapable$ObjectIdFieldSupplier;Ljava/lang/Object;)V", null, null);
        generateThrowJDOUnsupportedOptionException(mv);
        mv.visitMaxs(0, 0);
    }
    private void generateJdoCopyKeyFieldsFromObjectIdMethod() {
        CodeVisitor mv;
        mv = cv.visitMethod(ACC_PUBLIC, "jdoCopyKeyFieldsFromObjectId", 
                "(Ljavax/jdo/spi/PersistenceCapable$ObjectIdFieldConsumer;Ljava/lang/Object;)V", null, null);
        generateThrowJDOUnsupportedOptionException(mv);
        mv.visitMaxs(0, 0);
    }

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                "(Ljavax/jdo/spi/PersistenceCapable$ObjectIdFieldConsumer;Ljava/lang/Object;)V", null, null);
        generateThrowJDOUnsupportedOptionException(mv);
        mv.visitMaxs(0, 0);
    }
    private void generateJdoMakeDirtyMethod() {
        CodeVisitor mv;
        mv = cv.visitMethod(ACC_PUBLIC, "jdoMakeDirty", "(Ljava/lang/String;)V", null, null);
        mv.visitInsn(RETURN);
        mv.visitMaxs(0, 0);
    }

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        mv = cv.visitMethod(ACC_PUBLIC, "jdoMakeDirty", "(Ljava/lang/String;)V", null, null);
        mv.visitInsn(RETURN);
        mv.visitMaxs(0, 0);
    }
    private void generateJdoIsDirtyMethod() {
        CodeVisitor mv;
        mv = cv.visitMethod(ACC_PUBLIC, "jdoIsDirty", "()Z", null, null);
        
        generateReturnFalseIfNotIsActive(mv);
        
        //StateItf sa = speedoGetState();
        mv.visitVarInsn(ALOAD, 0);
        mv.visitMethodInsn(INVOKEVIRTUAL, classToWrite, M_SPEEDO_GET_STATE, "()" + JT_STATE);
        mv.visitVarInsn(ASTORE, 1);


        //if (sa == null) {
        //    return false;
        //}
        mv.visitVarInsn(ALOAD, 1);
        Label l4 = new Label();
        mv.visitJumpInsn(IFNONNULL, l4);
        mv.visitInsn(ICONST_0);
        mv.visitInsn(IRETURN);
        mv.visitLabel(l4);


        //byte status = sa.jdoGetStatus();
        mv.visitVarInsn(ALOAD, 1);
        mv.visitMethodInsn(INVOKEINTERFACE, JCN_STATE, M_SPEEDO_GET_STATUS, "()B");
        mv.visitVarInsn(ISTORE, 2);


        //return !LifeCycle.isTransient(status) && LifeCycle.isDirty(status);
        mv.visitVarInsn(ILOAD, 2);
        mv.visitMethodInsn(INVOKESTATIC, JCN_LIFE_CYCLE, "isTransient", "(B)Z");
        Label l7 = new Label();
        mv.visitJumpInsn(IFNE, l7);


        mv.visitVarInsn(ILOAD, 2);
        mv.visitMethodInsn(INVOKESTATIC, JCN_LIFE_CYCLE, "isDirty", "(B)Z");
        mv.visitJumpInsn(IFEQ, l7);
        
        mv.visitInsn(ICONST_1);
        Label l8 = new Label();
        mv.visitJumpInsn(GOTO, l8);
        
        mv.visitLabel(l7);
        mv.visitInsn(ICONST_0);
        
        mv.visitLabel(l8);
        mv.visitInsn(IRETURN);
        mv.visitMaxs(0, 0);
    }

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