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add and test new ruin strategy: cluster ruin based on dbscan clusterer

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oblonski 2015-03-06 16:16:09 +01:00
parent 708400a34a
commit f4dc5e3b8d
8 changed files with 356 additions and 30 deletions
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75
jsprit-core/src/test/java/jsprit/core/algorithm/ruin/DBSCANClustererTest.java Normal file
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package jsprit.core.algorithm.ruin;
import jsprit.core.problem.Location;
import jsprit.core.problem.job.Job;
import jsprit.core.problem.job.Service;
import jsprit.core.problem.solution.route.VehicleRoute;
import jsprit.core.problem.vehicle.VehicleImpl;
import jsprit.core.util.EuclideanCosts;
import junit.framework.Assert;
import org.junit.Test;
import java.util.List;
/**
* Created by schroeder on 06/03/15.
*/
public class DBSCANClustererTest {
@Test
public void itShouldReturnOneClusterOfSizeTwo(){
Service s1 = Service.Builder.newInstance("s1").setLocation(Location.newInstance(1,1)).build();
Service s2 = Service.Builder.newInstance("s2").setLocation(Location.newInstance(10,10)).build();
Service s3 = Service.Builder.newInstance("s3").setLocation(Location.newInstance(9,9)).build();
VehicleImpl v = VehicleImpl.Builder.newInstance("v").setStartLocation(Location.newInstance(0,0)).build();
VehicleRoute r = VehicleRoute.Builder.newInstance(v).addService(s1).addService(s2).addService(s3).build();
DBSCANClusterer c = new DBSCANClusterer(new EuclideanCosts());
c.setEpsDistance(3);
List<Job> cluster = c.getRandomCluster(r);
Assert.assertEquals(2,cluster.size());
}
@Test
public void itShouldReturnOneCluster(){
Service s1 = Service.Builder.newInstance("s1").setLocation(Location.newInstance(1,1)).build();
Service s2 = Service.Builder.newInstance("s2").setLocation(Location.newInstance(10,10)).build();
Service s3 = Service.Builder.newInstance("s3").setLocation(Location.newInstance(9,9)).build();
VehicleImpl v = VehicleImpl.Builder.newInstance("v").setStartLocation(Location.newInstance(0,0)).build();
VehicleRoute r = VehicleRoute.Builder.newInstance(v).addService(s1).addService(s2).addService(s3).build();
DBSCANClusterer c = new DBSCANClusterer(new EuclideanCosts());
c.setEpsDistance(3);
List<List<Job>> cluster = c.getClusters(r);
Assert.assertEquals(1,cluster.size());
}
@Test
public void itShouldReturnTwoClusters(){
Service s0 = Service.Builder.newInstance("s0").setLocation(Location.newInstance(9,0)).build();
Service s1 = Service.Builder.newInstance("s1").setLocation(Location.newInstance(9,1)).build();
Service s2 = Service.Builder.newInstance("s2").setLocation(Location.newInstance(9,10)).build();
Service s3 = Service.Builder.newInstance("s3").setLocation(Location.newInstance(9,9)).build();
Service s4 = Service.Builder.newInstance("s4").setLocation(Location.newInstance(9,16)).build();
Service s5 = Service.Builder.newInstance("s5").setLocation(Location.newInstance(9,17)).build();
VehicleImpl v = VehicleImpl.Builder.newInstance("v").setStartLocation(Location.newInstance(0,0)).build();
VehicleRoute r = VehicleRoute.Builder.newInstance(v).addService(s1).addService(s2).addService(s3)
.addService(s0).addService(s4).addService(s5).build();
DBSCANClusterer c = new DBSCANClusterer(new EuclideanCosts());
c.setMinPts(1);
c.setEpsDistance(2);
List<List<Job>> cluster = c.getClusters(r);
for(List<Job> l : cluster) {
System.out.println("--");
for (Job j : l) System.out.println(j);
}
Assert.assertEquals(3,cluster.size());
}
}

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jsprit-core/src/test/java/jsprit/core/algorithm/ruin/RuinClustersTest.java Normal file
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package jsprit.core.algorithm.ruin;
import jsprit.core.algorithm.ruin.distance.AvgServiceAndShipmentDistance;
import jsprit.core.problem.Location;
import jsprit.core.problem.VehicleRoutingProblem;
import jsprit.core.problem.job.Job;
import jsprit.core.problem.job.Service;
import jsprit.core.problem.solution.route.VehicleRoute;
import jsprit.core.problem.vehicle.VehicleImpl;
import junit.framework.Assert;
import org.junit.Test;
import java.util.Arrays;
import java.util.Collection;
/**
* Created by schroeder on 06/03/15.
*/
public class RuinClustersTest {
@Test
public void itShouldRuinTwoObviousClusters(){
Service s0 = Service.Builder.newInstance("s0").setLocation(Location.newInstance(9, 0)).build();
Service s1 = Service.Builder.newInstance("s1").setLocation(Location.newInstance(9, 1)).build();
Service s2 = Service.Builder.newInstance("s2").setLocation(Location.newInstance(9,10)).build();
Service s3 = Service.Builder.newInstance("s3").setLocation(Location.newInstance(9,9)).build();
Service s4 = Service.Builder.newInstance("s4").setLocation(Location.newInstance(9,16)).build();
Service s5 = Service.Builder.newInstance("s5").setLocation(Location.newInstance(9,17)).build();
Service s6 = Service.Builder.newInstance("s6").setLocation(Location.newInstance(9,15.5)).build();
Service s7 = Service.Builder.newInstance("s7").setLocation(Location.newInstance(9,30)).build();
VehicleImpl v = VehicleImpl.Builder.newInstance("v").setStartLocation(Location.newInstance(0,0)).build();
VehicleRoutingProblem vrp = VehicleRoutingProblem.Builder.newInstance().addJob(s1).addJob(s2)
.addJob(s6).addJob(s7).addJob(s0).addJob(s3).addJob(s4).addJob(s5).addVehicle(v).build();
VehicleRoute vr1 = VehicleRoute.Builder.newInstance(v).addService(s0).addService(s1).addService(s2).addService(s3).setJobActivityFactory(vrp.getJobActivityFactory()).build();
VehicleRoute vr2 = VehicleRoute.Builder.newInstance(v)
.addService(s6).addService(s7).addService(s4).addService(s5).setJobActivityFactory(vrp.getJobActivityFactory()).build();
JobNeighborhoods n = new JobNeighborhoodsFactory().createNeighborhoods(vrp,new AvgServiceAndShipmentDistance(vrp.getTransportCosts()));
n.initialise();
RuinClusters rc = new RuinClusters(vrp,5,n);
Collection<Job> ruined = rc.ruinRoutes(Arrays.asList(vr1,vr2));
Assert.assertEquals(5,ruined.size());
}
}