PlanMutateTimeAllocationSimplified.java

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/* *********************************************************************** *
 * project: org.matsim.*
 * PlanMutateTimeAllocation.java
 *                                                                         *
 * *********************************************************************** *
 *                                                                         *
 * copyright       : (C) 2007, 2008 by the members listed in the COPYING,  *
 *                   LICENSE and WARRANTY file.                            *
 * email           : info at matsim dot org                                *
 *                                                                         *
 * *********************************************************************** *
 *                                                                         *
 *   This program 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 2 of the License, or     *
 *   (at your option) any later version.                                   *
 *   See also COPYING, LICENSE and WARRANTY file                           *
 *                                                                         *
 * *********************************************************************** */

package org.matsim.core.population.algorithms;

import java.util.Random;

import org.matsim.api.core.v01.population.Activity;
import org.matsim.api.core.v01.population.Plan;
import org.matsim.core.router.TripStructureUtils;
import org.matsim.core.router.TripStructureUtils.StageActivityHandling;

public final class PlanMutateTimeAllocationSimplified implements PlanAlgorithm {

    private final StageActivityHandling stageActivityHandling;
    private final double mutationRange;
    private final Random random;
    private final boolean affectingDuration;

    public PlanMutateTimeAllocationSimplified(final double mutationRange, boolean affectingDuration, final Random random) {
        this( StageActivityHandling.StagesAsNormalActivities , mutationRange , affectingDuration, random );
    }
    public PlanMutateTimeAllocationSimplified(final StageActivityHandling stageActivityHandling, final double mutationRange, boolean affectingDuration, final Random random) {
        this.stageActivityHandling = stageActivityHandling;
        this.mutationRange = mutationRange;
        this.affectingDuration = affectingDuration;
        this.random = random;
    }

    @Override
    public void run(final Plan plan) {
        for ( Activity act : TripStructureUtils.getActivities( plan , stageActivityHandling ) ) {
            // this is deliberately simplistic.  Cleanup up of the time information should be done somewhere else.
            if (act.getEndTime().isDefined()) {
                act.setEndTime(mutateTime(act.getEndTime().seconds()));
            }
            if ( affectingDuration ) {
                if ( act.getMaximumDuration().isDefined()) {
                    act.setMaximumDuration(mutateTime(act.getMaximumDuration().seconds()));
                }
            }
        }
        // the legs are not doing anything. kai, jun'12
    }

    private double mutateTime(final double time) {
        double t = time;
        t = t + (int)((this.random.nextDouble() * 2.0 - 1.0) * this.mutationRange);

        if (t < 0) {
            t = 0;
        }
        // note that this also affects duration
        
        return t;
    }

}