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 * JSR_W - Jump to subroutine
28 */
29 public class JSR_W extends JsrInstruction {
30
31 /**
32 * Empty constructor needed for Instruction.readInstruction. Not to be used otherwise.
33 */
34 JSR_W() {
35 }
36
37 public JSR_W(final InstructionHandle target) {
38 super(org.apache.bcel.Const.JSR_W, target);
39 super.setLength(5);
40 }
41
42 /**
43 * Call corresponding visitor method(s). The order is: Call visitor methods of implemented interfaces first, then call
44 * methods according to the class hierarchy in descending order, i.e., the most specific visitXXX() call comes last.
45 *
46 * @param v Visitor object
47 */
48 @Override
49 public void accept(final Visitor v) {
50 v.visitStackProducer(this);
51 v.visitBranchInstruction(this);
52 v.visitJsrInstruction(this);
53 v.visitJSR_W(this);
54 }
55
56 /**
57 * Dump instruction as byte code to stream out.
58 *
59 * @param out Output stream
60 */
61 @Override
62 public void dump(final DataOutputStream out) throws IOException {
63 super.setIndex(getTargetOffset());
64 out.writeByte(super.getOpcode());
65 out.writeInt(super.getIndex());
66 }
67
68 /**
69 * Reads needed data (for example index) from file.
70 */
71 @Override
72 protected void initFromFile(final ByteSequence bytes, final boolean wide) throws IOException {
73 super.setIndex(bytes.readInt());
74 super.setLength(5);
75 }
76 }