RelationshipId.java

/**
 * Copyright (c) 2002-2011 "Neo Technology,"
 * Network Engine for Objects in Lund AB [http://neotechnology.com]
 *
 * This file is part of Neo4j.
 *
 * Neo4j is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License as
 * published by the Free Software Foundation, either version 3 of the
 * License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with this program. If not, see <http://www.gnu.org/licenses/>.
 */
package org.neo4j.index.impl.lucene;

import org.neo4j.graphdb.Relationship;

class RelationshipId
{
    final long id;
    final long startNode;
    final long endNode;

    RelationshipId( long id, long startNode, long endNode )
    {
        this.id = id;
        this.startNode = startNode;
        this.endNode = endNode;
    }
    
    public static RelationshipId of( Relationship rel )
    {
        return new RelationshipId( rel.getId(), rel.getStartNode().getId(), rel.getEndNode().getId() );
    }
    
    @Override
    public boolean equals( Object obj )
    {
        return ((RelationshipId) obj).id == id;
    }
    
    @Override
    public int hashCode()
    {
        return (int) id;
    }
}