org.neo4j.storageengine.api.schema.LabelScanReader Maven / Gradle / Ivy

Go to download
/*
 * Copyright (c) 2002-2016 "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 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.storageengine.api.schema;

import java.util.Iterator;

import org.neo4j.collection.primitive.PrimitiveLongIterator;
import org.neo4j.graphdb.Resource;

/**
 * Reader of a label scan store which contains label-->nodes mappings.
 */
public interface LabelScanReader extends Resource
{
    /**
     * @param labelId label token id.
     * @return node ids with the given {@code labelId}.
     */
    PrimitiveLongIterator nodesWithLabel( int labelId );

    /**
     * @param nodeId node id to get label ids for.
     * @return label ids for the given {@code nodeId}.
     */
    PrimitiveLongIterator labelsForNode( long nodeId );
}