    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 * Source file class file attribute
    024 */
    025public class SourceFileAttribute extends Attribute {
    026
    027    private final CPUTF8 name;
    028    private int nameIndex;
    029    private static CPUTF8 attributeName;
    030
    031    public static void setAttributeName(final CPUTF8 cpUTF8Value) {
    032        attributeName = cpUTF8Value;
    033    }
    034
    035    public SourceFileAttribute(final CPUTF8 name) {
    036        super(attributeName);
    037        this.name = name;
    038    }
    039
    040    @Override
    041    public boolean equals(final Object obj) {
    042        if (this == obj) {
    043            return true;
    044        }
    045        if (!super.equals(obj)) {
    046            return false;
    047        }
    048        if (this.getClass() != obj.getClass()) {
    049            return false;
    050        }
    051        final SourceFileAttribute other = (SourceFileAttribute) obj;
    052        if (name == null) {
    053            if (other.name != null) {
    054                return false;
    055            }
    056        } else if (!name.equals(other.name)) {
    057            return false;
    058        }
    059        return true;
    060    }
    061
    062    /*
    063     * (non-Javadoc)
    064     *
    065     * @see org.apache.commons.compress.harmony.unpack200.bytecode.Attribute#isSourceFileAttribute()
    066     */
    067    @Override
    068    public boolean isSourceFileAttribute() {
    069        return true;
    070    }
    071
    072    @Override
    073    protected int getLength() {
    074        return 2;
    075    }
    076
    077    @Override
    078    protected ClassFileEntry[] getNestedClassFileEntries() {
    079        return new ClassFileEntry[] {getAttributeName(), name};
    080    }
    081
    082    @Override
    083    public int hashCode() {
    084        final int PRIME = 31;
    085        int result = super.hashCode();
    086        result = PRIME * result + ((name == null) ? 0 : name.hashCode());
    087        return result;
    088    }
    089
    090    @Override
    091    protected void resolve(final ClassConstantPool pool) {
    092        super.resolve(pool);
    093        nameIndex = pool.indexOf(name);
    094    }
    095
    096    @Override
    097    public String toString() {
    098        return "SourceFile: " + name;
    099    }
    100
    101    @Override
    102    protected void writeBody(final DataOutputStream dos) throws IOException {
    103        dos.writeShort(nameIndex);
    104    }
    105}