1 /*
2 * Licensed to the Apache Software Foundation (ASF) under one
3 * or more contributor license agreements. See the NOTICE file
4 * distributed with this work for additional information
5 * regarding copyright ownership. The ASF licenses this file
6 * to you under the Apache License, Version 2.0 (the
7 * "License"); you may not use this file except in compliance
8 * with the License. You may obtain a copy of the License at
9 *
10 * https://www.apache.org/licenses/LICENSE-2.0
11 *
12 * Unless required by applicable law or agreed to in writing,
13 * software distributed under the License is distributed on an
14 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
15 * KIND, either express or implied. See the License for the
16 * specific language governing permissions and limitations
17 * under the License.
18 */
19
20 package org.apache.bcel.generic;
21
22 /**
23 * Denotes that a class targets InstructionHandles within an InstructionList.
24 *
25 * @see BranchHandle
26 * @see LocalVariableGen
27 * @see CodeExceptionGen
28 */
29 public interface InstructionTargeter {
30
31 // static final InstructionTargeter[] EMPTY_ARRAY = new InstructionTargeter[0];
32
33 /**
34 * Tests whether this targeter targets the specified instruction handle.
35 *
36 * @param instructionHandle the instruction handle to test.
37 * @return whether this targeter targets the specified instruction handle.
38 */
39 boolean containsTarget(InstructionHandle instructionHandle);
40
41 /**
42 * Replaces the target of this targeter from this old handle to the new handle.
43 *
44 * @param oldIh the old handle
45 * @param newIh the new handle
46 * @throws ClassGenException if oldIh is not targeted by this object
47 */
48 void updateTarget(InstructionHandle oldIh, InstructionHandle newIh) throws ClassGenException;
49 }