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119 lines
4.3 KiB
Java
119 lines
4.3 KiB
Java
/*******************************************************************************
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* Copyright (C) 2014 Stefan Schroeder
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 3.0 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library. If not, see <http://www.gnu.org/licenses/>.
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******************************************************************************/
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package jsprit.examples;
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import jsprit.analysis.toolbox.AlgorithmSearchProgressChartListener;
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import jsprit.analysis.toolbox.Plotter;
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import jsprit.analysis.toolbox.Plotter.Label;
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import jsprit.core.algorithm.VehicleRoutingAlgorithm;
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import jsprit.core.algorithm.io.VehicleRoutingAlgorithms;
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import jsprit.core.algorithm.selector.SelectBest;
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import jsprit.core.analysis.SolutionAnalyser;
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import jsprit.core.problem.Location;
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import jsprit.core.problem.VehicleRoutingProblem;
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import jsprit.core.problem.io.VrpXMLReader;
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import jsprit.core.problem.solution.VehicleRoutingProblemSolution;
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import jsprit.core.reporting.SolutionPrinter;
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import jsprit.util.Examples;
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import java.util.Collection;
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public class PickupAndDeliveryExample {
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public static void main(String[] args) {
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/*
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* some preparation - create output folder
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*/
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Examples.createOutputFolder();
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/*
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* Build the problem.
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*
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* But define a problem-builder first.
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*/
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VehicleRoutingProblem.Builder vrpBuilder = VehicleRoutingProblem.Builder.newInstance();
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/*
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* A solomonReader reads solomon-instance files, and stores the required information in the builder.
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*/
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new VrpXMLReader(vrpBuilder).read("input/pickups_and_deliveries_solomon_r101_withoutTWs.xml");
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/*
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* Finally, the problem can be built. By default, transportCosts are crowFlyDistances (as usually used for vrp-instances).
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*/
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final VehicleRoutingProblem vrp = vrpBuilder.build();
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new Plotter(vrp).plot("output/pd_solomon_r101.png", "pd_r101");
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/*
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* Define the required vehicle-routing algorithms to solve the above problem.
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*
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* The algorithm can be defined and configured in an xml-file.
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*/
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// VehicleRoutingAlgorithm vra = new SchrimpfFactory().createAlgorithm(vrp);
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VehicleRoutingAlgorithm vra = VehicleRoutingAlgorithms.readAndCreateAlgorithm(vrp, "input/algorithmConfig_solomon.xml");
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vra.getAlgorithmListeners().addListener(new AlgorithmSearchProgressChartListener("output/sol_progress.png"));
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/*
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* Solve the problem.
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*
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*
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*/
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Collection<VehicleRoutingProblemSolution> solutions = vra.searchSolutions();
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/*
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* Retrieve best solution.
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*/
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VehicleRoutingProblemSolution solution = new SelectBest().selectSolution(solutions);
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/*
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* print solution
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*/
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SolutionPrinter.print(solution);
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/*
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* Plot solution.
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*/
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// SolutionPlotter.plotSolutionAsPNG(vrp, solution, "output/pd_solomon_r101_solution.png","pd_r101");
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Plotter plotter = new Plotter(vrp, solution);
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plotter.setLabel(Label.SIZE);
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plotter.plot("output/pd_solomon_r101_solution.png", "pd_r101");
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//some stats
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SolutionAnalyser analyser = new SolutionAnalyser(vrp, solution, new SolutionAnalyser.DistanceCalculator() {
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@Override
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public double getDistance(Location from, Location to) {
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return vrp.getTransportCosts().getTransportCost(from, to, 0., null, null);
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}
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});
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System.out.println("tp_distance: " + analyser.getDistance());
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System.out.println("tp_time: " + analyser.getTransportTime());
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System.out.println("waiting: " + analyser.getWaitingTime());
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System.out.println("service: " + analyser.getServiceTime());
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System.out.println("#picks: " + analyser.getNumberOfPickups());
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System.out.println("#deliveries: " + analyser.getNumberOfDeliveries());
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}
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}
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