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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  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  }