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;
023import java.util.Objects;
024
025/**
026 * Source file class file attribute
027 */
028public class SourceFileAttribute extends Attribute {
029
030    private static CPUTF8 attributeName;
031
032    public static void setAttributeName(final CPUTF8 cpUTF8Value) {
033        attributeName = cpUTF8Value;
034    }
035
036    private final CPUTF8 name;
037
038    private int nameIndex;
039
040    public SourceFileAttribute(final CPUTF8 name) {
041        super(attributeName);
042        this.name = name;
043    }
044
045    @Override
046    public boolean equals(final Object obj) {
047        if (this == obj) {
048            return true;
049        }
050        if (!super.equals(obj) || this.getClass() != obj.getClass()) {
051            return false;
052        }
053        final SourceFileAttribute other = (SourceFileAttribute) obj;
054        return Objects.equals(name, other.name);
055    }
056
057    @Override
058    protected int getLength() {
059        return 2;
060    }
061
062    @Override
063    protected ClassFileEntry[] getNestedClassFileEntries() {
064        return new ClassFileEntry[] { getAttributeName(), name };
065    }
066
067    @Override
068    public int hashCode() {
069        final int PRIME = 31;
070        int result = super.hashCode();
071        result = PRIME * result + (name == null ? 0 : name.hashCode());
072        return result;
073    }
074
075    /*
076     * (non-Javadoc)
077     *
078     * @see org.apache.commons.compress.harmony.unpack200.bytecode.Attribute#isSourceFileAttribute()
079     */
080    @Override
081    public boolean isSourceFileAttribute() {
082        return true;
083    }
084
085    @Override
086    protected void resolve(final ClassConstantPool pool) {
087        super.resolve(pool);
088        nameIndex = pool.indexOf(name);
089    }
090
091    @Override
092    public String toString() {
093        return "SourceFile: " + name;
094    }
095
096    @Override
097    protected void writeBody(final DataOutputStream dos) throws IOException {
098        dos.writeShort(nameIndex);
099    }
100}