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.DataOutputStream; 25 import java.io.IOException; 26 27 import com.sun.org.apache.bcel.internal.util.ByteSequence; 28 29 /** 30 * LOOKUPSWITCH - Switch with unordered set of values 31 * 32 * @version $Id$ 33 * @see SWITCH 34 */ 35 public class LOOKUPSWITCH extends Select { 36 37 /** 38 * Empty constructor needed for Instruction.readInstruction. 39 * Not to be used otherwise. 40 */ 41 LOOKUPSWITCH() { 42 } 43 44 45 public LOOKUPSWITCH(final int[] match, final InstructionHandle[] targets, 46 final InstructionHandle defaultTarget) { 47 super(com.sun.org.apache.bcel.internal.Const.LOOKUPSWITCH, match, targets, defaultTarget); 48 /* alignment remainder assumed 0 here, until dump time. */ 49 final short _length = (short) (9 + getMatch_length() * 8); 50 super.setLength(_length); 51 setFixed_length(_length); 52 } 53 54 55 /** 56 * Dump instruction as byte code to stream out. 57 * @param out Output stream 58 */ 59 @Override 60 public void dump( final DataOutputStream out ) throws IOException { 61 super.dump(out); 62 final int _match_length = getMatch_length(); 63 out.writeInt(_match_length); // npairs 64 for (int i = 0; i < _match_length; i++) { 65 out.writeInt(super.getMatch(i)); // match-offset pairs 66 out.writeInt(setIndices(i, getTargetOffset(super.getTarget(i)))); 67 } 68 } 69 70 71 /** 72 * Read needed data (e.g. index) from file. 73 */ 74 @Override 75 protected void initFromFile( final ByteSequence bytes, final boolean wide ) throws IOException { 76 super.initFromFile(bytes, wide); // reads padding 77 final int _match_length = bytes.readInt(); 78 setMatch_length(_match_length); 79 final short _fixed_length = (short) (9 + _match_length * 8); 80 setFixed_length(_fixed_length); 81 final short _length = (short) (_match_length + super.getPadding()); 82 super.setLength(_length); 83 super.setMatches(new int[_match_length]); 84 super.setIndices(new int[_match_length]); 85 super.setTargets(new InstructionHandle[_match_length]); 86 for (int i = 0; i < _match_length; i++) { 87 super.setMatch(i, bytes.readInt()); 88 super.setIndices(i, bytes.readInt()); 89 } 90 } 91 92 93 /** 94 * Call corresponding visitor method(s). The order is: 95 * Call visitor methods of implemented interfaces first, then 96 * call methods according to the class hierarchy in descending order, 97 * i.e., the most specific visitXXX() call comes last. 98 * 99 * @param v Visitor object 100 */ 101 @Override 102 public void accept( final Visitor v ) { 103 v.visitVariableLengthInstruction(this); 104 v.visitStackConsumer(this); 105 v.visitBranchInstruction(this); 106 v.visitSelect(this); 107 v.visitLOOKUPSWITCH(this); 108 } 109 }