1 /*
2 * Licensed to the Apache Software Foundation (ASF) under one or more
3 * contributor license agreements. See the NOTICE file distributed with
4 * this work for additional information regarding copyright ownership.
5 * The ASF licenses this file to You under the Apache License, Version 2.0
6 * (the "License"); you may not use this file except in compliance with
7 * the License. You may obtain a copy of the License at
8 *
9 * http://www.apache.org/licenses/LICENSE-2.0
10 *
11 * Unless required by applicable law or agreed to in writing, software
12 * distributed under the License is distributed on an "AS IS" BASIS,
13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 * See the License for the specific language governing permissions and
15 * limitations under the License.
16 */
17 package org.apache.bcel.generic;
18
19 import java.io.DataOutputStream;
20 import java.io.IOException;
21
22 import org.apache.bcel.util.ByteSequence;
23
24 /**
25 * JSR_W - Jump to subroutine
26 */
27 public class JSR_W extends JsrInstruction {
28
29 /**
30 * Empty constructor needed for Instruction.readInstruction. Not to be used otherwise.
31 */
32 JSR_W() {
33 }
34
35 public JSR_W(final InstructionHandle target) {
36 super(org.apache.bcel.Const.JSR_W, target);
37 super.setLength(5);
38 }
39
40 /**
41 * Call corresponding visitor method(s). The order is: Call visitor methods of implemented interfaces first, then call
42 * methods according to the class hierarchy in descending order, i.e., the most specific visitXXX() call comes last.
43 *
44 * @param v Visitor object
45 */
46 @Override
47 public void accept(final Visitor v) {
48 v.visitStackProducer(this);
49 v.visitBranchInstruction(this);
50 v.visitJsrInstruction(this);
51 v.visitJSR_W(this);
52 }
53
54 /**
55 * Dump instruction as byte code to stream out.
56 *
57 * @param out Output stream
58 */
59 @Override
60 public void dump(final DataOutputStream out) throws IOException {
61 super.setIndex(getTargetOffset());
62 out.writeByte(super.getOpcode());
63 out.writeInt(super.getIndex());
64 }
65
66 /**
67 * Read needed data (e.g. index) from file.
68 */
69 @Override
70 protected void initFromFile(final ByteSequence bytes, final boolean wide) throws IOException {
71 super.setIndex(bytes.readInt());
72 super.setLength(5);
73 }
74 }