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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   */
18  package org.apache.bcel.generic;
19  
20  import java.io.DataOutputStream;
21  import java.io.IOException;
22  
23  import org.apache.bcel.util.ByteSequence;
24  
25  /**
26   * JSR_W - Jump to subroutine
27   *
28   * @version $Id: JSR_W.html 1021978 2017-12-09 17:38:21Z ggregory $
29   */
30  public class JSR_W extends JsrInstruction {
31  
32      /**
33       * Empty constructor needed for Instruction.readInstruction.
34       * Not to be used otherwise.
35       */
36      JSR_W() {
37      }
38  
39  
40      public JSR_W(final InstructionHandle target) {
41          super(org.apache.bcel.Const.JSR_W, target);
42          super.setLength(5);
43      }
44  
45  
46      /**
47       * Dump instruction as byte code to stream out.
48       * @param out Output stream
49       */
50      @Override
51      public void dump( final DataOutputStream out ) throws IOException {
52          super.setIndex(getTargetOffset());
53          out.writeByte(super.getOpcode());
54          out.writeInt(super.getIndex());
55      }
56  
57  
58      /**
59       * Read needed data (e.g. index) from file.
60       */
61      @Override
62      protected void initFromFile( final ByteSequence bytes, final boolean wide ) throws IOException {
63          super.setIndex(bytes.readInt());
64          super.setLength(5);
65      }
66  
67  
68      /**
69       * Call corresponding visitor method(s). The order is:
70       * Call visitor methods of implemented interfaces first, then
71       * call methods according to the class hierarchy in descending order,
72       * i.e., the most specific visitXXX() call comes last.
73       *
74       * @param v Visitor object
75       */
76      @Override
77      public void accept( final Visitor v ) {
78          v.visitStackProducer(this);
79          v.visitBranchInstruction(this);
80          v.visitJsrInstruction(this);
81          v.visitJSR_W(this);
82      }
83  }