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Code Issues Releases Wiki Activity

Merge pull request #181 from muzuro/master

Browse source 
ability to add load constraints only
This commit is contained in:
Stefan Schröder 2015-09-04 20:16:05 +02:00
commit 46ded83ec1
4 changed files with 54 additions and 8 deletions
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4
jsprit-core/src/main/java/jsprit/core/algorithm/PrettyAlgorithmBuilder.java
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@ -136,7 +136,9 @@ public class PrettyAlgorithmBuilder {
vra.addListener(new AlgorithmStartsListener() {
@Override
public void informAlgorithmStarts(VehicleRoutingProblem problem, VehicleRoutingAlgorithm algorithm, Collection<VehicleRoutingProblemSolution> solutions) {
solutions.add(new InsertionInitialSolutionFactory(iniInsertionStrategy, iniObjFunction).createSolution(vrp));
if (solutions.isEmpty()) {
solutions.add(new InsertionInitialSolutionFactory(iniInsertionStrategy, iniObjFunction).createSolution(vrp));
}
}
});
}

2
jsprit-core/src/main/java/jsprit/core/problem/constraint/ServiceLoadActivityLevelConstraint.java
View file

@ -32,7 +32,7 @@ import jsprit.core.problem.solution.route.state.RouteAndActivityStateGetter;
* @author schroeder
*
*/
class ServiceLoadActivityLevelConstraint implements HardActivityConstraint {
public class ServiceLoadActivityLevelConstraint implements HardActivityConstraint {
private RouteAndActivityStateGetter stateManager;

2
jsprit-core/src/main/java/jsprit/core/problem/constraint/ServiceLoadRouteLevelConstraint.java
View file

@ -33,7 +33,7 @@ import jsprit.core.problem.solution.route.state.RouteAndActivityStateGetter;
* @author stefan
*
*/
class ServiceLoadRouteLevelConstraint implements HardRouteConstraint {
public class ServiceLoadRouteLevelConstraint implements HardRouteConstraint {
private RouteAndActivityStateGetter stateManager;

54
jsprit-core/src/test/java/jsprit/core/algorithm/InitialRoutesTest.java
View file

@ -18,12 +18,27 @@
package jsprit.core.algorithm;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertFalse;
import static org.junit.Assert.assertTrue;
import java.util.Collection;
import java.util.List;
import jsprit.core.algorithm.box.GreedySchrimpfFactory;
import jsprit.core.algorithm.box.Jsprit;
import jsprit.core.algorithm.box.Jsprit.Builder;
import jsprit.core.algorithm.box.SchrimpfFactory;
import jsprit.core.algorithm.state.StateManager;
import jsprit.core.algorithm.state.UpdateEndLocationIfRouteIsOpen;
import jsprit.core.algorithm.state.UpdateVariableCosts;
import jsprit.core.problem.AbstractActivity;
import jsprit.core.problem.Location;
import jsprit.core.problem.VehicleRoutingProblem;
import jsprit.core.problem.constraint.ConstraintManager;
import jsprit.core.problem.constraint.ConstraintManager.Priority;
import jsprit.core.problem.constraint.ServiceLoadActivityLevelConstraint;
import jsprit.core.problem.constraint.ServiceLoadRouteLevelConstraint;
import jsprit.core.problem.io.VrpXMLReader;
import jsprit.core.problem.job.Job;
import jsprit.core.problem.job.Service;
@ -38,13 +53,9 @@ import jsprit.core.problem.vehicle.VehicleTypeImpl;
import jsprit.core.reporting.SolutionPrinter;
import jsprit.core.util.Coordinate;
import jsprit.core.util.Solutions;
import org.junit.Test;
import java.util.Collection;
import java.util.List;
import static org.junit.Assert.*;
public class InitialRoutesTest {
@Test
@ -395,4 +406,37 @@ public class InitialRoutesTest {
vra.searchSolutions();
assertTrue(true);
}
@Test
public void buildWithoutTimeConstraints() {
Service s1 = Service.Builder.newInstance("s1").setLocation(Location.newInstance(0,10)).addSizeDimension(0, 10).build();
Service s2 = Service.Builder.newInstance("s2").setLocation(Location.newInstance(10,20)).addSizeDimension(0, 12).build();
VehicleTypeImpl vt = VehicleTypeImpl.Builder.newInstance("vt").addCapacityDimension(0, 15).build();
VehicleImpl v = VehicleImpl.Builder.newInstance("v").setType(vt).setStartLocation(Location.newInstance(0,0)).build();
VehicleRoutingProblem vrp = VehicleRoutingProblem.Builder.newInstance().addJob(s1).addJob(s2).addVehicle(v).build();
Builder algBuilder = Jsprit.Builder.newInstance(vrp).addCoreStateAndConstraintStuff(false);
// only required constraints
StateManager stateManager = new StateManager(vrp);
ConstraintManager constraintManager = new ConstraintManager(vrp, stateManager);
constraintManager.addConstraint(new ServiceLoadRouteLevelConstraint(stateManager));
constraintManager.addConstraint(new ServiceLoadActivityLevelConstraint(stateManager), Priority.LOW);
stateManager.updateLoadStates();
stateManager.addStateUpdater(new UpdateEndLocationIfRouteIsOpen());
stateManager.addStateUpdater(new UpdateVariableCosts(vrp.getActivityCosts(), vrp.getTransportCosts(), stateManager));
algBuilder.setStateAndConstraintManager(stateManager, constraintManager);
VehicleRoutingAlgorithm vra = algBuilder.buildAlgorithm();
vra.setMaxIterations(20);
Collection<VehicleRoutingProblemSolution> searchSolutions = vra.searchSolutions();
VehicleRoutingProblemSolution bestOf = Solutions.bestOf(searchSolutions);
//ensure 2 routes
assertEquals(2, bestOf.getRoutes().size());
//ensure no time information in first service of first route
assertEquals(0, bestOf.getRoutes().iterator().next().getActivities().iterator().next().getArrTime(), 0.001);
}
}