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OptaPlanner solves planning problems.
This lightweight, embeddable planning engine implements powerful and scalable algorithms
to optimize business resource scheduling and planning.
This module contains the examples which demonstrate how to use it in a normal Java application.
/*
* Copyright 2014 Red Hat, Inc. and/or its affiliates.
*
* Licensed 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 org.optaplanner.examples.vehiclerouting.persistence.util;
import java.io.File;
import java.util.LinkedHashMap;
import java.util.List;
import java.util.Map;
import org.optaplanner.core.api.score.buildin.hardsoftlong.HardSoftLongScore;
import org.optaplanner.core.api.solver.SolverFactory;
import org.optaplanner.core.impl.score.director.ScoreDirector;
import org.optaplanner.core.impl.score.director.ScoreDirectorFactory;
import org.optaplanner.examples.common.app.CommonApp;
import org.optaplanner.examples.common.app.LoggingMain;
import org.optaplanner.examples.vehiclerouting.app.VehicleRoutingApp;
import org.optaplanner.examples.vehiclerouting.domain.Customer;
import org.optaplanner.examples.vehiclerouting.domain.Standstill;
import org.optaplanner.examples.vehiclerouting.domain.Vehicle;
import org.optaplanner.examples.vehiclerouting.domain.VehicleRoutingSolution;
import org.optaplanner.persistence.common.api.domain.solution.SolutionFileIO;
import org.optaplanner.persistence.xstream.impl.domain.solution.XStreamSolutionFileIO;
public class VehicleRoutingDistanceTypeComparison extends LoggingMain {
private final ScoreDirectorFactory scoreDirectorFactory;
public static void main(String[] args) {
new VehicleRoutingDistanceTypeComparison().compare(
"solved/tmp-p-belgium-n50-k10.xml",
"solved/tmp-p-belgium-road-km-n50-k10.xml",
"solved/tmp-p-belgium-road-time-n50-k10.xml");
}
protected final File dataDir;
protected final SolutionFileIO solutionFileIO;
public VehicleRoutingDistanceTypeComparison() {
dataDir = CommonApp.determineDataDir(VehicleRoutingApp.DATA_DIR_NAME);
solutionFileIO = new XStreamSolutionFileIO<>(VehicleRoutingSolution.class);
SolverFactory solverFactory = SolverFactory
.createFromXmlResource(VehicleRoutingApp.SOLVER_CONFIG);
scoreDirectorFactory = solverFactory.getScoreDirectorFactory();
}
public void compare(String... filePaths) {
File[] files = new File[filePaths.length];
for (int i = 0; i < filePaths.length; i++) {
File file = new File(dataDir, filePaths[i]);
if (!file.exists()) {
throw new IllegalArgumentException("The file (" + file + ") does not exist.");
}
files[i] = file;
}
for (File varFile : files) {
logger.info(" Results for {}:", varFile.getName());
// Intentionally create a new instance instead of reusing the older one.
VehicleRoutingSolution variablesSolution = (VehicleRoutingSolution) solutionFileIO.read(varFile);
for (File inputFile : files) {
HardSoftLongScore score;
if (inputFile == varFile) {
score = variablesSolution.getScore();
} else {
VehicleRoutingSolution inputSolution = (VehicleRoutingSolution) solutionFileIO.read(inputFile);
applyVariables(inputSolution, variablesSolution);
score = inputSolution.getScore();
}
logger.info(" {} (according to {})", score.getSoftScore(), inputFile.getName());
}
}
}
private void applyVariables(VehicleRoutingSolution inputSolution, VehicleRoutingSolution varSolution) {
List inputVehicleList = inputSolution.getVehicleList();
Map inputVehicleMap = new LinkedHashMap<>(inputVehicleList.size());
for (Vehicle vehicle : inputVehicleList) {
inputVehicleMap.put(vehicle.getId(), vehicle);
}
List inputCustomerList = inputSolution.getCustomerList();
Map inputCustomerMap = new LinkedHashMap<>(inputCustomerList.size());
for (Customer customer : inputCustomerList) {
inputCustomerMap.put(customer.getId(), customer);
}
for (Vehicle varVehicle : varSolution.getVehicleList()) {
Vehicle inputVehicle = inputVehicleMap.get(varVehicle.getId());
Customer varNext = varVehicle.getNextCustomer();
inputVehicle.setNextCustomer(varNext == null ? null : inputCustomerMap.get(varNext.getId()));
}
for (Customer varCustomer : varSolution.getCustomerList()) {
Customer inputCustomer = inputCustomerMap.get(varCustomer.getId());
Standstill varPrevious = varCustomer.getPreviousStandstill();
inputCustomer.setPreviousStandstill(varPrevious == null ? null
: varPrevious instanceof Vehicle ? inputVehicleMap.get(((Vehicle) varPrevious).getId())
: inputCustomerMap.get(((Customer) varPrevious).getId()));
Customer varNext = varCustomer.getNextCustomer();
inputCustomer.setNextCustomer(varNext == null ? null : inputCustomerMap.get(varNext.getId()));
}
try (ScoreDirector scoreDirector = scoreDirectorFactory.buildScoreDirector()) {
scoreDirector.setWorkingSolution(inputSolution);
scoreDirector.calculateScore();
}
}
}