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