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 package org.apache.bcel.generic;
20
21 import java.io.DataOutputStream;
22 import java.io.IOException;
23
24 import org.apache.bcel.util.ByteSequence;
25
26 /**
27 * GOTO_W - Branch always (to relative offset, not absolute address)
28 */
29 public class GOTO_W extends GotoInstruction {
30
31 /**
32 * Empty constructor needed for Instruction.readInstruction. Not to be used otherwise.
33 */
34 GOTO_W() {
35 }
36
37 /**
38 * Constructs a GOTO_W instruction.
39 *
40 * @param target the target instruction.
41 */
42 public GOTO_W(final InstructionHandle target) {
43 super(org.apache.bcel.Const.GOTO_W, target);
44 super.setLength(5);
45 }
46
47 /**
48 * Call corresponding visitor method(s). The order is: Call visitor methods of implemented interfaces first, then call
49 * methods according to the class hierarchy in descending order, that is, the most specific visitXXX() call comes last.
50 *
51 * @param v Visitor object.
52 */
53 @Override
54 public void accept(final Visitor v) {
55 v.visitUnconditionalBranch(this);
56 v.visitBranchInstruction(this);
57 v.visitGotoInstruction(this);
58 v.visitGOTO_W(this);
59 }
60
61 /**
62 * Dumps instruction as byte code to stream out.
63 *
64 * @param out Output stream.
65 */
66 @Override
67 public void dump(final DataOutputStream out) throws IOException {
68 super.setIndex(getTargetOffset());
69 out.writeByte(super.getOpcode());
70 out.writeInt(super.getIndex());
71 }
72
73 /**
74 * Reads needed data (for example index) from file.
75 */
76 @Override
77 protected void initFromFile(final ByteSequence bytes, final boolean wide) throws IOException {
78 super.setIndex(bytes.readInt());
79 super.setLength(5);
80 }
81 }