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 final int line_number_table_length;
028    private final int[] start_pcs;
029    private final int[] line_numbers;
030    private static CPUTF8 attributeName;
031
032    public static void setAttributeName(final CPUTF8 cpUTF8Value) {
033        attributeName = cpUTF8Value;
034    }
035
036    public LineNumberTableAttribute(final int line_number_table_length, final int[] start_pcs,
037        final int[] line_numbers) {
038        super(attributeName);
039        this.line_number_table_length = line_number_table_length;
040        this.start_pcs = start_pcs;
041        this.line_numbers = line_numbers;
042    }
043
044    @Override
045    protected int getLength() {
046        return 2 + (4 * line_number_table_length);
047    }
048
049    @Override
050    protected void writeBody(final DataOutputStream dos) throws IOException {
051        dos.writeShort(line_number_table_length);
052        for (int i = 0; i < line_number_table_length; i++) {
053            dos.writeShort(start_pcs[i]);
054            dos.writeShort(line_numbers[i]);
055        }
056    }
057
058    /*
059     * (non-Javadoc)
060     *
061     * @see org.apache.commons.compress.harmony.unpack200.bytecode.ClassFileEntry#toString()
062     */
063    @Override
064    public String toString() {
065        return "LineNumberTable: " + line_number_table_length + " lines";
066    }
067
068    /*
069     * (non-Javadoc)
070     *
071     * @see org.apache.commons.compress.harmony.unpack200.bytecode.Attribute#getNestedClassFileEntries()
072     */
073    @Override
074    protected ClassFileEntry[] getNestedClassFileEntries() {
075        return new ClassFileEntry[] {getAttributeName()};
076    }
077
078    @Override
079    public boolean equals(final Object obj) {
080        return this == obj;
081    }
082
083    /*
084     * (non-Javadoc)
085     *
086     * @see
087     * org.apache.commons.compress.harmony.unpack200.bytecode.Attribute#resolve(org.apache.commons.compress.harmony.
088     * unpack200.bytecode.ClassConstantPool)
089     */
090    @Override
091    protected void resolve(final ClassConstantPool pool) {
092        super.resolve(pool);
093    }
094
095    @Override
096    protected int[] getStartPCs() {
097        return start_pcs;
098    }
099}