    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, final int[] lineNumbers) {
    038        super(attributeName);
    039        this.lineNumberTableLength = lineNumberTableLength;
    040        this.startPcs = startPcs;
    041        this.lineNumbers = lineNumbers;
    042    }
    043
    044    @Override
    045    public boolean equals(final Object obj) {
    046        return this == obj;
    047    }
    048
    049    @Override
    050    protected int getLength() {
    051        return 2 + 4 * lineNumberTableLength;
    052    }
    053
    054    /*
    055     * (non-Javadoc)
    056     *
    057     * @see org.apache.commons.compress.harmony.unpack200.bytecode.Attribute#getNestedClassFileEntries()
    058     */
    059    @Override
    060    protected ClassFileEntry[] getNestedClassFileEntries() {
    061        return new ClassFileEntry[] { getAttributeName() };
    062    }
    063
    064    @Override
    065    protected int[] getStartPCs() {
    066        return startPcs;
    067    }
    068
    069    /*
    070     * (non-Javadoc)
    071     *
    072     * @see org.apache.commons.compress.harmony.unpack200.bytecode.ClassFileEntry#toString()
    073     */
    074    @Override
    075    public String toString() {
    076        return "LineNumberTable: " + lineNumberTableLength + " lines";
    077    }
    078
    079    @Override
    080    protected void writeBody(final DataOutputStream dos) throws IOException {
    081        dos.writeShort(lineNumberTableLength);
    082        for (int i = 0; i < lineNumberTableLength; i++) {
    083            dos.writeShort(startPcs[i]);
    084            dos.writeShort(lineNumbers[i]);
    085        }
    086    }
    087}