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    public static void setAttributeName(final CPUTF8 cpUTF8Value) {
030        attributeName = cpUTF8Value;
031    }
032    private final CPUTF8 name;
033
034    private int nameIndex;
035
036    public SourceFileAttribute(final CPUTF8 name) {
037        super(attributeName);
038        this.name = name;
039    }
040
041    @Override
042    public boolean equals(final Object obj) {
043        if (this == obj) {
044            return true;
045        }
046        if (!super.equals(obj)) {
047            return false;
048        }
049        if (this.getClass() != obj.getClass()) {
050            return false;
051        }
052        final SourceFileAttribute other = (SourceFileAttribute) obj;
053        if (!Objects.equals(name, other.name)) {
054            return false;
055        }
056        return true;
057    }
058
059    @Override
060    protected int getLength() {
061        return 2;
062    }
063
064    @Override
065    protected ClassFileEntry[] getNestedClassFileEntries() {
066        return new ClassFileEntry[] {getAttributeName(), name};
067    }
068
069    @Override
070    public int hashCode() {
071        final int PRIME = 31;
072        int result = super.hashCode();
073        result = PRIME * result + (name == null ? 0 : name.hashCode());
074        return result;
075    }
076
077    /*
078     * (non-Javadoc)
079     *
080     * @see org.apache.commons.compress.harmony.unpack200.bytecode.Attribute#isSourceFileAttribute()
081     */
082    @Override
083    public boolean isSourceFileAttribute() {
084        return true;
085    }
086
087    @Override
088    protected void resolve(final ClassConstantPool pool) {
089        super.resolve(pool);
090        nameIndex = pool.indexOf(name);
091    }
092
093    @Override
094    public String toString() {
095        return "SourceFile: " + name;
096    }
097
098    @Override
099    protected void writeBody(final DataOutputStream dos) throws IOException {
100        dos.writeShort(nameIndex);
101    }
102}