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AspectJ tools most notably contains the AspectJ compiler (AJC). AJC applies aspects to Java classes during compilation, fully replacing Javac for plain Java classes and also compiling native AspectJ or annotation-based @AspectJ syntax. Furthermore, AJC can weave aspects into existing class files in a post-compile binary weaving step. This library is a superset of AspectJ weaver and hence also of AspectJ runtime.

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package org.aspectj.apache.bcel.generic;

/**
 * A small subclass of the local variable accessing instruction class InstructionLV - this subclass does
 * not allow the index to be altered.
 */
public class InstructionCLV extends InstructionLV {

	public InstructionCLV(short opcode) {
		super(opcode);
	}

	public InstructionCLV(short opcode,int localVariableIndex) {
		super(opcode,localVariableIndex);
	}

	public void setIndex(int localVariableIndex) {
		if (localVariableIndex!=getIndex()) {
			throw new ClassGenException("Do not attempt to modify the index to '"+localVariableIndex+"' for this constant instruction: "+this);
		}
	}

	public boolean canSetIndex() {
	    return false;
	}

}