mirror of
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114 lines
4.8 KiB
Java
114 lines
4.8 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.GraphStreamViewer;
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import com.graphhopper.jsprit.analysis.toolbox.GraphStreamViewer.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.box.SchrimpfFactory;
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import com.graphhopper.jsprit.core.problem.Location;
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import com.graphhopper.jsprit.core.problem.VehicleRoutingProblem;
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import com.graphhopper.jsprit.core.problem.job.Service;
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import com.graphhopper.jsprit.core.problem.solution.VehicleRoutingProblemSolution;
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import com.graphhopper.jsprit.core.problem.vehicle.VehicleImpl;
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import com.graphhopper.jsprit.core.problem.vehicle.VehicleImpl.Builder;
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import com.graphhopper.jsprit.core.problem.vehicle.VehicleType;
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import com.graphhopper.jsprit.core.problem.vehicle.VehicleTypeImpl;
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import com.graphhopper.jsprit.core.reporting.SolutionPrinter;
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import com.graphhopper.jsprit.core.util.Solutions;
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import com.graphhopper.jsprit.io.problem.VrpXMLWriter;
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import java.io.File;
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import java.util.Collection;
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public class SimpleExample {
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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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File dir = new File("output");
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// if the directory does not exist, create it
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if (!dir.exists()) {
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System.out.println("creating directory ./output");
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boolean result = dir.mkdir();
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if (result) System.out.println("./output created");
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}
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/*
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* get a vehicle type-builder and build a type with the typeId "vehicleType" and one capacity dimension, i.e. weight, and capacity dimension value of 2
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*/
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final int WEIGHT_INDEX = 0;
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VehicleTypeImpl.Builder vehicleTypeBuilder = VehicleTypeImpl.Builder.newInstance("vehicleType").addCapacityDimension(WEIGHT_INDEX, 2);
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VehicleType vehicleType = vehicleTypeBuilder.build();
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/*
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* get a vehicle-builder and build a vehicle located at (10,10) with type "vehicleType"
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*/
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Builder vehicleBuilder = VehicleImpl.Builder.newInstance("vehicle");
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vehicleBuilder.setStartLocation(Location.newInstance(10, 10));
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vehicleBuilder.setType(vehicleType);
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VehicleImpl vehicle = vehicleBuilder.build();
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/*
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* build services at the required locations, each with a capacity-demand of 1.
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*/
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Service service1 = Service.Builder.newInstance("1").addSizeDimension(WEIGHT_INDEX, 1).setLocation(Location.newInstance(5, 7)).build();
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Service service2 = Service.Builder.newInstance("2").addSizeDimension(WEIGHT_INDEX, 1).setLocation(Location.newInstance(5, 13)).build();
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Service service3 = Service.Builder.newInstance("3").addSizeDimension(WEIGHT_INDEX, 1).setLocation(Location.newInstance(15, 7)).build();
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Service service4 = Service.Builder.newInstance("4").addSizeDimension(WEIGHT_INDEX, 1).setLocation(Location.newInstance(15, 13)).build();
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VehicleRoutingProblem.Builder vrpBuilder = VehicleRoutingProblem.Builder.newInstance();
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vrpBuilder.addVehicle(vehicle);
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vrpBuilder.addJob(service1).addJob(service2).addJob(service3).addJob(service4);
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VehicleRoutingProblem problem = vrpBuilder.build();
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/*
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* get the algorithm out-of-the-box.
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*/
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VehicleRoutingAlgorithm algorithm = Jsprit.createAlgorithm(problem);
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/*
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* and search a solution
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*/
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Collection<VehicleRoutingProblemSolution> solutions = algorithm.searchSolutions();
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/*
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* get the best
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*/
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VehicleRoutingProblemSolution bestSolution = Solutions.bestOf(solutions);
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new VrpXMLWriter(problem, solutions).write("output/problem-with-solution.xml");
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SolutionPrinter.print(problem, bestSolution, SolutionPrinter.Print.VERBOSE);
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/*
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* plot
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*/
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// SolutionPlotter.plotSolutionAsPNG(problem, bestSolution, "output/solution.png", "solution");
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new GraphStreamViewer(problem, bestSolution).labelWith(Label.ID).setRenderDelay(200).display();
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}
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}
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