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112 lines
4.1 KiB
Java
112 lines
4.1 KiB
Java
/*
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* Licensed to GraphHopper GmbH under one or more contributor
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* license agreements. See the NOTICE file distributed with this work for
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* additional information regarding copyright ownership.
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*
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* GraphHopper GmbH licenses this file to you under the Apache License,
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* Version 2.0 (the "License"); you may not use this file except in
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* compliance with the License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package com.graphhopper.jsprit.examples;
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import com.graphhopper.jsprit.analysis.toolbox.AlgorithmSearchProgressChartListener;
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import com.graphhopper.jsprit.analysis.toolbox.Plotter;
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import com.graphhopper.jsprit.analysis.toolbox.Plotter.Label;
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import com.graphhopper.jsprit.core.algorithm.VehicleRoutingAlgorithm;
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import com.graphhopper.jsprit.core.algorithm.box.Jsprit;
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import com.graphhopper.jsprit.core.algorithm.selector.SelectBest;
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import com.graphhopper.jsprit.core.analysis.SolutionAnalyser;
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import com.graphhopper.jsprit.core.problem.VehicleRoutingProblem;
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import com.graphhopper.jsprit.core.problem.solution.VehicleRoutingProblemSolution;
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import com.graphhopper.jsprit.core.reporting.SolutionPrinter;
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import com.graphhopper.jsprit.io.problem.VrpXMLReader;
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import com.graphhopper.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 = Jsprit.createAlgorithm(vrp);
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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, vrp.getTransportCosts());
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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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