/**
* Copyright (c) 2002-2010 "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.kernel;
import java.util.HashSet;
import java.util.Set;
import org.neo4j.graphdb.traversal.TraversalBranch;
class GloballyUnique extends AbstractUniquenessFilter
{
private final Set<Long> visited = new HashSet<Long>();
GloballyUnique( PrimitiveTypeFetcher type )
{
super( type );
}
public boolean check( TraversalBranch branch, boolean remember )
{
long id = type.getId( branch );
return remember ? visited.add( id ) : !visited.contains( id );
}
}