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 *     http://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 *
019 */
020package org.apache.directory.mavibot.btree;
021
022
023import java.util.Arrays;
024
025
026/**
027 * A class to hold name, revision, and copied page offsets of a B-Tree.
028 *
029 * @author <a href="mailto:dev@directory.apache.org">Apache Directory Project</a>
030 */
031public class RevisionOffset
032{
033    /** the revision number */
034    private long revision;
035
036    /** offsets of copied pages */
037    private long[] offsets;
038
039
040    /**
041     * Creates a new instance of RevisionOffset.
042     *
043     * @param revision the revision number
044     * @param offsets array of copied page offsets
045     */
046    public RevisionOffset( long revision, long[] offsets )
047    {
048        this.revision = revision;
049        this.offsets = offsets;
050    }
051
052
053    public long getRevision()
054    {
055        return revision;
056    }
057
058
059    /* no qualifier */void setRevision( long revision )
060    {
061        this.revision = revision;
062    }
063
064
065    public long[] getOffsets()
066    {
067        return offsets;
068    }
069
070
071    /* no qualifier */void setOffsets( long[] offsets )
072    {
073        this.offsets = offsets;
074    }
075
076
077    @Override
078    public int hashCode()
079    {
080        final int prime = 31;
081        int result = 1;
082        result = prime * result + ( int ) ( revision ^ ( revision >>> 32 ) );
083        return result;
084    }
085
086
087    @Override
088    public boolean equals( Object obj )
089    {
090        if ( this == obj )
091        {
092            return true;
093        }
094        
095        if ( obj == null )
096        {
097            return false;
098        }
099
100        RevisionOffset other = ( RevisionOffset ) obj;
101
102        if ( revision != other.revision )
103        {
104            return false;
105        }
106
107        return true;
108    }
109
110
111    @Override
112    public String toString()
113    {
114        return "RevisionOffset [revision=" + revision + ", offsets=" + Arrays.toString( offsets ) + "]";
115    }
116
117}