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Neo4j kernel is a lightweight, embedded Java database designed to store data structured as graphs rather than tables. For more information, see http://neo4j.org.

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/*
 * Copyright (c) 2002-2015 "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.kernel.impl.transaction.state;

import org.neo4j.kernel.impl.store.record.NodeRecord;
import org.neo4j.kernel.impl.store.record.RelationshipRecord;
import org.neo4j.kernel.impl.util.RelIdArray;

public class DirectionIdentifier
{
    public static RelIdArray.DirectionWrapper wrapDirection( RelationshipRecord rel, NodeRecord startNode )
    {
        boolean isOut = rel.getFirstNode() == startNode.getId();
        boolean isIn = rel.getSecondNode() == startNode.getId();
        assert isOut | isIn;
        if ( isOut & isIn )
        {
            return RelIdArray.DirectionWrapper.BOTH;
        }
        return isOut ? RelIdArray.DirectionWrapper.OUTGOING : RelIdArray.DirectionWrapper.INCOMING;
    }
}