1 /*
   2  * reserved comment block
   3  * DO NOT REMOVE OR ALTER!
   4  */
   5 /*
   6  * Licensed to the Apache Software Foundation (ASF) under one or more
   7  * contributor license agreements.  See the NOTICE file distributed with
   8  * this work for additional information regarding copyright ownership.
   9  * The ASF licenses this file to You under the Apache License, Version 2.0
  10  * (the "License"); you may not use this file except in compliance with
  11  * the License.  You may obtain a copy of the License at
  12  *
  13  *      http://www.apache.org/licenses/LICENSE-2.0
  14  *
  15  * Unless required by applicable law or agreed to in writing, software
  16  * distributed under the License is distributed on an "AS IS" BASIS,
  17  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  18  * See the License for the specific language governing permissions and
  19  * limitations under the License.
  20  */
  21 
  22 package com.sun.org.apache.bcel.internal.generic;
  23 
  24 import java.io.*;
  25 import com.sun.org.apache.bcel.internal.util.ByteSequence;
  26 
  27 /**
  28  * GOTO_W - Branch always (to relative offset, not absolute address)
  29  *
  30  * @author  <A HREF="mailto:markus.dahm@berlin.de">M. Dahm</A>
  31  */
  32 public class GOTO_W extends GotoInstruction {
  33   /**
  34    * Empty constructor needed for the Class.newInstance() statement in
  35    * Instruction.readInstruction(). Not to be used otherwise.
  36    */
  37   GOTO_W() {}
  38 
  39   public GOTO_W(InstructionHandle target) {
  40     super(com.sun.org.apache.bcel.internal.Constants.GOTO_W, target);
  41     length = 5;
  42   }
  43 
  44   /**
  45    * Dump instruction as byte code to stream out.
  46    * @param out Output stream
  47    */
  48   public void dump(DataOutputStream out) throws IOException {
  49     index = getTargetOffset();
  50     out.writeByte(opcode);
  51     out.writeInt(index);
  52   }
  53 
  54   /**
  55    * Read needed data (e.g. index) from file.
  56    */
  57   protected void initFromFile(ByteSequence bytes, boolean wide) throws IOException
  58   {
  59     index  = bytes.readInt();
  60     length = 5;
  61   }
  62 
  63   /**
  64    * Call corresponding visitor method(s). The order is:
  65    * Call visitor methods of implemented interfaces first, then
  66    * call methods according to the class hierarchy in descending order,
  67    * i.e., the most specific visitXXX() call comes last.
  68    *
  69    * @param v Visitor object
  70    */
  71   public void accept(Visitor v) {
  72     v.visitUnconditionalBranch(this);
  73     v.visitBranchInstruction(this);
  74     v.visitGotoInstruction(this);
  75     v.visitGOTO_W(this);
  76   }
  77 }