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