org.neo4j.graphdb.traversal.GloballyUnique Maven / Gradle / Ivy
Go to download
Show more of this group Show more artifacts with this name
Show all versions of neo4j-graphdb-api Show documentation
Show all versions of neo4j-graphdb-api Show documentation
Graph Database API for Neo4j.
/*
* Copyright (c) "Neo4j"
* Neo4j Sweden AB [http://neo4j.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 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see .
*/
package org.neo4j.graphdb.traversal;
import org.eclipse.collections.api.set.primitive.MutableLongSet;
import org.eclipse.collections.impl.set.mutable.primitive.LongHashSet;
import org.neo4j.graphdb.Path;
class GloballyUnique extends AbstractUniquenessFilter
{
private final MutableLongSet visited = new LongHashSet( 1 << 12 );
GloballyUnique( PrimitiveTypeFetcher type )
{
super( type );
}
@Override
public boolean check( TraversalBranch branch )
{
return visited.add( type.getId( branch ) );
}
@Override
public boolean checkFull( Path path )
{
// Since this is for bidirectional uniqueness checks and
// uniqueness is enforced through the shared "visited" set
// this uniqueness contract is fulfilled automatically.
return true;
}
}