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GraphHopper is a fast and memory efficient Java road routing engine working seamlessly with OpenStreetMap data.

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/*
 *  Licensed to GraphHopper GmbH under one or more contributor
 *  license agreements. See the NOTICE file distributed with this work for 
 *  additional information regarding copyright ownership.
 * 
 *  GraphHopper GmbH licenses this file to you under the Apache License, 
 *  Version 2.0 (the "License"); you may not use this file except in 
 *  compliance with the License. You may obtain a copy of the License at
 * 
 *       http://www.apache.org/licenses/LICENSE-2.0
 * 
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS,
 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 */
package com.graphhopper.routing.util;

import com.graphhopper.util.EdgeIteratorState;

/**
 * Calculates the shortest route - independent of a vehicle as the calculation is based on the
 * distance only.
 * 
 * @author Peter Karich
 */
public class ShortestWeighting extends AbstractWeighting
{
    public ShortestWeighting( FlagEncoder flagEncoder )
    {
        super(flagEncoder);
    }

    @Override
    public double getMinWeight( double currDistToGoal )
    {
        return currDistToGoal;
    }

    @Override
    public double calcWeight( EdgeIteratorState edgeState, boolean reverse, int prevOrNextEdgeId )
    {
        return edgeState.getDistance();
    }

    @Override
    public String getName()
    {
        return "shortest";
    }
}