    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}