    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}