001/* 002 * Licensed to the Apache Software Foundation (ASF) under one or more 003 * contributor license agreements. See the NOTICE file distributed with 004 * this work for additional information regarding copyright ownership. 005 * The ASF licenses this file to You under the Apache License, Version 2.0 006 * (the "License"); you may not use this file except in compliance with 007 * the License. You may obtain a copy of the License at 008 * 009 * http://www.apache.org/licenses/LICENSE-2.0 010 * 011 * Unless required by applicable law or agreed to in writing, software 012 * distributed under the License is distributed on an "AS IS" BASIS, 013 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 014 * See the License for the specific language governing permissions and 015 * limitations under the License. 016 */ 017package org.apache.commons.compress.harmony.unpack200.bytecode; 018 019import java.io.DataOutputStream; 020import java.io.IOException; 021 022/** 023 * Line number table 024 */ 025public class LineNumberTableAttribute extends BCIRenumberedAttribute { 026 027 private static CPUTF8 attributeName; 028 029 public static void setAttributeName(final CPUTF8 cpUTF8Value) { 030 attributeName = cpUTF8Value; 031 } 032 033 private final int lineNumberTableLength; 034 private final int[] startPcs; 035 private final int[] lineNumbers; 036 037 public LineNumberTableAttribute(final int lineNumberTableLength, final int[] startPcs, 038 final int[] lineNumbers) { 039 super(attributeName); 040 this.lineNumberTableLength = lineNumberTableLength; 041 this.startPcs = startPcs; 042 this.lineNumbers = lineNumbers; 043 } 044 045 @Override 046 public boolean equals(final Object obj) { 047 return this == obj; 048 } 049 050 @Override 051 protected int getLength() { 052 return 2 + 4 * lineNumberTableLength; 053 } 054 055 /* 056 * (non-Javadoc) 057 * 058 * @see org.apache.commons.compress.harmony.unpack200.bytecode.Attribute#getNestedClassFileEntries() 059 */ 060 @Override 061 protected ClassFileEntry[] getNestedClassFileEntries() { 062 return new ClassFileEntry[] {getAttributeName()}; 063 } 064 065 @Override 066 protected int[] getStartPCs() { 067 return startPcs; 068 } 069 070 /* 071 * (non-Javadoc) 072 * 073 * @see 074 * org.apache.commons.compress.harmony.unpack200.bytecode.Attribute#resolve(org.apache.commons.compress.harmony. 075 * unpack200.bytecode.ClassConstantPool) 076 */ 077 @Override 078 protected void resolve(final ClassConstantPool pool) { 079 super.resolve(pool); 080 } 081 082 /* 083 * (non-Javadoc) 084 * 085 * @see org.apache.commons.compress.harmony.unpack200.bytecode.ClassFileEntry#toString() 086 */ 087 @Override 088 public String toString() { 089 return "LineNumberTable: " + lineNumberTableLength + " lines"; 090 } 091 092 @Override 093 protected void writeBody(final DataOutputStream dos) throws IOException { 094 dos.writeShort(lineNumberTableLength); 095 for (int i = 0; i < lineNumberTableLength; i++) { 096 dos.writeShort(startPcs[i]); 097 dos.writeShort(lineNumbers[i]); 098 } 099 } 100}