add and test FastTransportCostMatrix based array

2020-01-24 07:45:05 +01:00 · 2014-12-17 22:20:01 +01:00 · 2014-12-17 22:20:01 +01:00 · 56f170e593
commit 56f170e593
parent 0a196f0abd
6 changed files with 231 additions and 21 deletions
--- a/jsprit-examples/src/main/java/jsprit/examples/RefuseCollectionWithFastMatrixExample.java
+++ b/jsprit-examples/src/main/java/jsprit/examples/RefuseCollectionWithFastMatrixExample.java
@ -0,0 +1,193 @@
+/*******************************************************************************
+ * Copyright (C) 2014  Stefan Schroeder
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 3.0 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public 
+ * License along with this library.  If not, see <http://www.gnu.org/licenses/>.
+ ******************************************************************************/
+package jsprit.examples;
+
+import jsprit.core.algorithm.VehicleRoutingAlgorithm;
+import jsprit.core.algorithm.box.GreedySchrimpfFactory;
+import jsprit.core.algorithm.termination.IterationWithoutImprovementTermination;
+import jsprit.core.problem.Location;
+import jsprit.core.problem.VehicleRoutingProblem;
+import jsprit.core.problem.VehicleRoutingProblem.FleetSize;
+import jsprit.core.problem.io.VrpXMLWriter;
+import jsprit.core.problem.job.Service;
+import jsprit.core.problem.solution.VehicleRoutingProblemSolution;
+import jsprit.core.problem.vehicle.VehicleImpl;
+import jsprit.core.problem.vehicle.VehicleTypeImpl;
+import jsprit.core.reporting.SolutionPrinter;
+import jsprit.core.util.FastVehicleRoutingTransportCostsMatrix;
+import jsprit.core.util.Solutions;
+import jsprit.util.Examples;
+
+import java.io.BufferedReader;
+import java.io.File;
+import java.io.FileReader;
+import java.io.IOException;
+import java.util.Collection;
+
+
+/**
+ * This example is base on
+ * http://web.mit.edu/urban_or_book/www/book/chapter6/6.4.12.html
+ * 
+ * @author stefan schroeder
+ *
+ */
+public class RefuseCollectionWithFastMatrixExample {
+
+	static class RelationKey {
+
+		final String from;
+		final String to;
+
+		public RelationKey(String from, String to) {
+			super();
+			this.from = from;
+			this.to = to;
+		}
+
+		/* (non-Javadoc)
+		 * @see java.lang.Object#hashCode()
+		 */
+		@Override
+		public int hashCode() {
+			final int prime = 31;
+			int result = 1;
+			result = prime * result + ((from == null) ? 0 : from.hashCode());
+			result = prime * result + ((to == null) ? 0 : to.hashCode());
+			return result;
+		}
+
+		/* (non-Javadoc)
+		 * @see java.lang.Object#equals(java.lang.Object)
+		 */
+		@Override
+		public boolean equals(Object obj) {
+			if (this == obj)
+				return true;
+			if (obj == null)
+				return false;
+			if (getClass() != obj.getClass())
+				return false;
+			RelationKey other = (RelationKey) obj;
+			if (from == null) {
+				if (other.from != null)
+					return false;
+			} else if (!from.equals(other.from))
+				return false;
+			if (to == null) {
+				if (other.to != null)
+					return false;
+			} else if (!to.equals(other.to))
+				return false;
+			return true;
+		}
+	}
+
+	public static void main(String[] args) throws IOException {
+		/*
+		 * some preparation - create output folder
+		 */
+		Examples.createOutputFolder();
+
+		/*
+		 * create vehicle-type and vehicle
+		 */
+		VehicleTypeImpl.Builder typeBuilder = VehicleTypeImpl.Builder.newInstance("vehicle-type").addCapacityDimension(0, 23);
+		typeBuilder.setCostPerDistance(1.0);
+		VehicleTypeImpl bigType = typeBuilder.build();
+
+		VehicleImpl.Builder vehicleBuilder = VehicleImpl.Builder.newInstance("vehicle");
+		vehicleBuilder.setStartLocation(Location.Builder.newInstance().setIndex(1).build());
+		vehicleBuilder.setType(bigType);
+		VehicleImpl bigVehicle = vehicleBuilder.build();
+
+		/*
+		 * start building the problem
+		 */
+		VehicleRoutingProblem.Builder vrpBuilder = VehicleRoutingProblem.Builder.newInstance();
+		vrpBuilder.setFleetSize(FleetSize.INFINITE);
+		vrpBuilder.addVehicle(bigVehicle);
+
+		/*
+		 * read demand quantities
+		 */
+		readDemandQuantities(vrpBuilder);
+
+		/*
+		 * create cost-matrix
+		 */
+		FastVehicleRoutingTransportCostsMatrix.Builder matrixBuilder = FastVehicleRoutingTransportCostsMatrix.Builder.newInstance(11,true);
+		readDistances(matrixBuilder);
+
+		vrpBuilder.setRoutingCost(matrixBuilder.build());
+		
+		VehicleRoutingProblem vrp = vrpBuilder.build();
+		
+		VehicleRoutingAlgorithm vra = new GreedySchrimpfFactory().createAlgorithm(vrp);
+		vra.setPrematureAlgorithmTermination(new IterationWithoutImprovementTermination(100));
+		Collection<VehicleRoutingProblemSolution> solutions = vra.searchSolutions();
+		
+		SolutionPrinter.print(Solutions.bestOf(solutions));
+		
+		new VrpXMLWriter(vrp, solutions).write("output/refuseCollectionExampleSolution.xml");
+		
+	}
+
+
+	private static void readDemandQuantities(VehicleRoutingProblem.Builder vrpBuilder) throws IOException {
+		BufferedReader reader = new BufferedReader(new FileReader(new File("input/RefuseCollectionExample_Quantities")));
+		String line;
+		boolean firstLine = true;
+		while((line = reader.readLine()) != null){
+			if(firstLine) {
+				firstLine = false;
+				continue;
+			}
+			String[] lineTokens = line.split(",");
+			/*
+			 * build service
+			 */
+			Service service = Service.Builder.newInstance(lineTokens[0])
+                    .addSizeDimension(0, Integer.parseInt(lineTokens[1]))
+                    .setLocation(Location.Builder.newInstance().setIndex(Integer.parseInt(lineTokens[0])).build())
+                    .build();
+			/*
+			 * and add it to problem
+			 */
+			vrpBuilder.addJob(service);
+		}
+		reader.close();
+	}
+	
+
+	private static void readDistances(FastVehicleRoutingTransportCostsMatrix.Builder matrixBuilder) throws IOException {
+		BufferedReader reader = new BufferedReader(new FileReader(new File("input/RefuseCollectionExample_Distances")));
+		String line;
+		boolean firstLine = true;
+		while((line = reader.readLine()) != null){
+			if(firstLine) {
+				firstLine = false;
+				continue;
+			}
+			String[] lineTokens = line.split(",");
+			matrixBuilder.addTransportDistance(Integer.parseInt(lineTokens[0]),Integer.parseInt(lineTokens[1]), Integer.parseInt(lineTokens[2]));
+		}
+		reader.close();
+		
+	}
+
+}