/*
 * 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 <http://www.gnu.org/licenses/>.
 */
package org.neo4j.graphalgo.impl.util;

import org.neo4j.graphalgo.CostEvaluator;
import org.neo4j.graphdb.Direction;
import org.neo4j.graphdb.Relationship;

public class DoubleEvaluator implements CostEvaluator<Double> {
    private final String costPropertyName;

    public DoubleEvaluator(String costPropertyName) {
        this.costPropertyName = costPropertyName;
    }

    @Override
    public Double getCost(Relationship relationship, Direction direction) {
        Object costProp = relationship.getProperty(costPropertyName);
        if (costProp instanceof Number) {
            return ((Number) costProp).doubleValue();
        } else {
            return Double.parseDouble(costProp.toString());
        }
    }
}
