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;
021import java.util.Objects;
022
023/**
024 * Source file class file attribute
025 */
026public class SourceFileAttribute extends Attribute {
027
028    private static CPUTF8 attributeName;
029
030    public static void setAttributeName(final CPUTF8 cpUTF8Value) {
031        attributeName = cpUTF8Value;
032    }
033
034    private final CPUTF8 name;
035
036    private int nameIndex;
037
038    public SourceFileAttribute(final CPUTF8 name) {
039        super(attributeName);
040        this.name = name;
041    }
042
043    @Override
044    public boolean equals(final Object obj) {
045        if (this == obj) {
046            return true;
047        }
048        if (!super.equals(obj)) {
049            return false;
050        }
051        if (this.getClass() != obj.getClass()) {
052            return false;
053        }
054        final SourceFileAttribute other = (SourceFileAttribute) obj;
055        return Objects.equals(name, other.name);
056    }
057
058    @Override
059    protected int getLength() {
060        return 2;
061    }
062
063    @Override
064    protected ClassFileEntry[] getNestedClassFileEntries() {
065        return new ClassFileEntry[] { getAttributeName(), name };
066    }
067
068    @Override
069    public int hashCode() {
070        final int PRIME = 31;
071        int result = super.hashCode();
072        result = PRIME * result + (name == null ? 0 : name.hashCode());
073        return result;
074    }
075
076    /*
077     * (non-Javadoc)
078     *
079     * @see org.apache.commons.compress.harmony.unpack200.bytecode.Attribute#isSourceFileAttribute()
080     */
081    @Override
082    public boolean isSourceFileAttribute() {
083        return true;
084    }
085
086    @Override
087    protected void resolve(final ClassConstantPool pool) {
088        super.resolve(pool);
089        nameIndex = pool.indexOf(name);
090    }
091
092    @Override
093    public String toString() {
094        return "SourceFile: " + name;
095    }
096
097    @Override
098    protected void writeBody(final DataOutputStream dos) throws IOException {
099        dos.writeShort(nameIndex);
100    }
101}