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/*

 * Licensed to the Apache Software Foundation (ASF) under one or more

 * contributor license agreements.  See the NOTICE file distributed with

 * this work for additional information regarding copyright ownership.

 * The ASF licenses this file to You under the Apache License, Version 2.0

 * (the "License"); you may not use this file except in compliance with

 * the License.  You may obtain a copy of the License at

 *

 *      http://www.apache.org/licenses/LICENSE-2.0

 *

 * Unless required by applicable law or agreed to in writing, software

 * distributed under the License is distributed on an "AS IS" BASIS,

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package com.sun.org.apache.bcel.internal.generic;

/**

 * Denote that a class targets InstructionHandles within an InstructionList. Namely

 * the following implementers:

 *

 * @see BranchHandle

 * @see LocalVariableGen

 * @see CodeExceptionGen

 */

public interface InstructionTargeter {

    /**

     * Checks whether this targeter targets the specified instruction handle.

     */

    boolean containsTarget(InstructionHandle ih);

    /**

     * Replaces the target of this targeter from this old handle to the new handle.

     *

     * @param old_ih the old handle

     * @param new_ih the new handle

     * @throws ClassGenException if old_ih is not targeted by this object

     */

    void updateTarget(InstructionHandle old_ih, InstructionHandle new_ih) throws ClassGenException;

}