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Code Issues Releases Wiki Activity

add problem modeling capabilities

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This commit is contained in:
oblonski 2014-03-23 19:53:43 +01:00
parent 31d9c4b069
commit 5399749cef
5 changed files with 152 additions and 8 deletions
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12
jsprit-core/src/main/java/jsprit/core/algorithm/VehicleRoutingAlgorithmBuilder.java Normal file
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@ -0,0 +1,12 @@
package jsprit.core.algorithm;
import jsprit.core.problem.VehicleRoutingProblem;
public class VehicleRoutingAlgorithmBuilder {
public VehicleRoutingAlgorithmBuilder(VehicleRoutingProblem problem, String algorithmConfig) {
}
}

46
jsprit-core/src/main/java/jsprit/core/algorithm/recreate/DellAmicoFixCostCalculator.java Normal file
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@ -0,0 +1,46 @@
package jsprit.core.algorithm.recreate;
import java.util.Collection;
import jsprit.core.algorithm.recreate.listener.InsertionStartsListener;
import jsprit.core.algorithm.recreate.listener.JobInsertedListener;
import jsprit.core.problem.constraint.SoftRouteConstraint;
import jsprit.core.problem.job.Job;
import jsprit.core.problem.misc.JobInsertionContext;
import jsprit.core.problem.solution.route.VehicleRoute;
import jsprit.core.problem.solution.route.state.RouteAndActivityStateGetter;
public class DellAmicoFixCostCalculator implements SoftRouteConstraint, InsertionStartsListener, JobInsertedListener{
private int nuOfJobsToRecreate;
private final JobInsertionConsideringFixCostsCalculator calculator;
private final int nuOfJobs;
public DellAmicoFixCostCalculator(final int nuOfJobs, final RouteAndActivityStateGetter stateGetter) {
super();
this.nuOfJobs=nuOfJobs;
calculator = new JobInsertionConsideringFixCostsCalculator(null, stateGetter);
}
@Override
public double getCosts(JobInsertionContext insertionContext) {// TODO Auto-generated method stub
return calculator.getCosts(insertionContext);
}
@Override
public void informInsertionStarts(Collection<VehicleRoute> routes, Collection<Job> unassignedJobs) {
this.nuOfJobsToRecreate = unassignedJobs.size();
double completenessRatio = (1-((double)nuOfJobsToRecreate/(double)nuOfJobs));
calculator.setSolutionCompletenessRatio(completenessRatio);
}
@Override
public void informJobInserted(Job job2insert, VehicleRoute inRoute, double additionalCosts, double additionalTime) {
nuOfJobsToRecreate--;
double completenessRatio = (1-((double)nuOfJobsToRecreate/(double)nuOfJobs));
calculator.setSolutionCompletenessRatio(completenessRatio);
}
}

26
jsprit-core/src/main/java/jsprit/core/algorithm/recreate/JobInsertionConsideringFixCostsCalculator.java
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@ -18,8 +18,10 @@ package jsprit.core.algorithm.recreate;
import jsprit.core.algorithm.recreate.InsertionData.NoInsertionFound;
import jsprit.core.problem.Capacity;
import jsprit.core.problem.constraint.SoftRouteConstraint;
import jsprit.core.problem.driver.Driver;
import jsprit.core.problem.job.Job;
import jsprit.core.problem.misc.JobInsertionContext;
import jsprit.core.problem.solution.route.VehicleRoute;
import jsprit.core.problem.solution.route.state.RouteAndActivityStateGetter;
import jsprit.core.problem.solution.route.state.StateFactory;
@ -28,10 +30,7 @@ import jsprit.core.problem.vehicle.VehicleImpl.NoVehicle;
import org.apache.log4j.Logger;
final class JobInsertionConsideringFixCostsCalculator implements JobInsertionCostsCalculator{
final class JobInsertionConsideringFixCostsCalculator implements JobInsertionCostsCalculator, SoftRouteConstraint{
private static final Logger logger = Logger.getLogger(JobInsertionConsideringFixCostsCalculator.class);
@ -52,10 +51,7 @@ final class JobInsertionConsideringFixCostsCalculator implements JobInsertionCos
@Override
public InsertionData getInsertionData(final VehicleRoute currentRoute, final Job jobToInsert, final Vehicle newVehicle, double newVehicleDepartureTime, final Driver newDriver, final double bestKnownPrice) {
double relFixCost = getDeltaRelativeFixCost(currentRoute, newVehicle, jobToInsert);
double absFixCost = getDeltaAbsoluteFixCost(currentRoute, newVehicle, jobToInsert);
double deltaFixCost = (1-solution_completeness_ratio)*relFixCost + solution_completeness_ratio*absFixCost;
double fixcost_contribution = weight_deltaFixCost*solution_completeness_ratio*deltaFixCost;
double fixcost_contribution = getFixCostContribution(currentRoute,jobToInsert, newVehicle);
if(fixcost_contribution > bestKnownPrice){
return InsertionData.createEmptyInsertionData();
}
@ -69,6 +65,15 @@ final class JobInsertionConsideringFixCostsCalculator implements JobInsertionCos
return insertionData;
}
private double getFixCostContribution(final VehicleRoute currentRoute,
final Job jobToInsert, final Vehicle newVehicle) {
double relFixCost = getDeltaRelativeFixCost(currentRoute, newVehicle, jobToInsert);
double absFixCost = getDeltaAbsoluteFixCost(currentRoute, newVehicle, jobToInsert);
double deltaFixCost = (1-solution_completeness_ratio)*relFixCost + solution_completeness_ratio*absFixCost;
double fixcost_contribution = weight_deltaFixCost*solution_completeness_ratio*deltaFixCost;
return fixcost_contribution;
}
public void setWeightOfFixCost(double weight){
weight_deltaFixCost = weight;
logger.info("set weightOfFixCostSaving to " + weight);
@ -120,4 +125,9 @@ final class JobInsertionConsideringFixCostsCalculator implements JobInsertionCos
return stateGetter.getRouteState(route, StateFactory.MAXLOAD, Capacity.class);
}
@Override
public double getCosts(JobInsertionContext insertionContext) {
return getFixCostContribution(insertionContext.getRoute(), insertionContext.getJob(), insertionContext.getNewVehicle());
}
}

49
jsprit-core/src/main/java/jsprit/core/algorithm/recreate/VariableTransportCostCalculator.java Normal file
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@ -0,0 +1,49 @@
package jsprit.core.algorithm.recreate;
import jsprit.core.problem.constraint.SoftActivityConstraint;
import jsprit.core.problem.cost.VehicleRoutingTransportCosts;
import jsprit.core.problem.misc.JobInsertionContext;
import jsprit.core.problem.solution.route.activity.End;
import jsprit.core.problem.solution.route.activity.TourActivity;
import jsprit.core.util.CalculationUtils;
public class VariableTransportCostCalculator implements SoftActivityConstraint{
private VehicleRoutingTransportCosts routingCosts;
public VariableTransportCostCalculator(VehicleRoutingTransportCosts routingCosts) {
super();
this.routingCosts = routingCosts;
}
@Override
public double getCosts(JobInsertionContext iFacts, TourActivity prevAct,TourActivity newAct, TourActivity nextAct, double depTimeAtPrevAct) {
double tp_costs_prevAct_newAct = routingCosts.getTransportCost(prevAct.getLocationId(), newAct.getLocationId(), depTimeAtPrevAct, iFacts.getNewDriver(), iFacts.getNewVehicle());
double tp_time_prevAct_newAct = routingCosts.getTransportTime(prevAct.getLocationId(), newAct.getLocationId(), depTimeAtPrevAct, iFacts.getNewDriver(), iFacts.getNewVehicle());
double newAct_arrTime = depTimeAtPrevAct + tp_time_prevAct_newAct;
double newAct_endTime = CalculationUtils.getActivityEndTime(newAct_arrTime, newAct);
//open routes
if(nextAct instanceof End){
if(!iFacts.getNewVehicle().isReturnToDepot()){
return tp_costs_prevAct_newAct;
}
}
double tp_costs_newAct_nextAct = routingCosts.getTransportCost(newAct.getLocationId(), nextAct.getLocationId(), newAct_endTime, iFacts.getNewDriver(), iFacts.getNewVehicle());
double totalCosts = tp_costs_prevAct_newAct + tp_costs_newAct_nextAct;
double oldCosts;
if(iFacts.getRoute().isEmpty()){
double tp_costs_prevAct_nextAct = routingCosts.getTransportCost(prevAct.getLocationId(), nextAct.getLocationId(), depTimeAtPrevAct, iFacts.getNewDriver(), iFacts.getNewVehicle());
oldCosts = tp_costs_prevAct_nextAct;
}
else{
double tp_costs_prevAct_nextAct = routingCosts.getTransportCost(prevAct.getLocationId(), nextAct.getLocationId(), prevAct.getEndTime(), iFacts.getRoute().getDriver(), iFacts.getRoute().getVehicle());
oldCosts = tp_costs_prevAct_nextAct;
}
return totalCosts - oldCosts;
}
}

27
jsprit-examples/src/main/java/jsprit/examples/TransportOfDisabledPeople.java
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@ -7,13 +7,18 @@ import jsprit.analysis.toolbox.GraphStreamViewer.Label;
import jsprit.analysis.toolbox.Plotter;
import jsprit.analysis.toolbox.SolutionPrinter;
import jsprit.core.algorithm.VehicleRoutingAlgorithm;
import jsprit.core.algorithm.VehicleRoutingAlgorithmBuilder;
import jsprit.core.algorithm.io.VehicleRoutingAlgorithms;
import jsprit.core.algorithm.recreate.DellAmicoFixCostCalculator;
import jsprit.core.algorithm.recreate.VariableTransportCostCalculator;
import jsprit.core.algorithm.state.StateManager;
import jsprit.core.algorithm.termination.IterationWithoutImprovementTermination;
import jsprit.core.problem.VehicleRoutingProblem;
import jsprit.core.problem.VehicleRoutingProblem.FleetSize;
import jsprit.core.problem.constraint.HardRouteStateLevelConstraint;
import jsprit.core.problem.job.Shipment;
import jsprit.core.problem.misc.JobInsertionContext;
import jsprit.core.problem.solution.SolutionCostCalculator;
import jsprit.core.problem.solution.VehicleRoutingProblemSolution;
import jsprit.core.problem.vehicle.Vehicle;
import jsprit.core.problem.vehicle.VehicleImpl;
@ -21,6 +26,7 @@ import jsprit.core.problem.vehicle.VehicleImpl.Builder;
import jsprit.core.problem.vehicle.VehicleType;
import jsprit.core.problem.vehicle.VehicleTypeImpl;
import jsprit.core.util.Coordinate;
import jsprit.core.util.CrowFlyCosts;
import jsprit.core.util.Solutions;
import jsprit.util.Examples;
@ -131,14 +137,35 @@ public class TransportOfDisabledPeople {
return true;
}
};
CrowFlyCosts crowFlyCosts = new CrowFlyCosts(vrpBuilder.getLocations());
StateManager stateManager = new StateManager(crowFlyCosts);
//add the constraint to the problem
vrpBuilder.addConstraint(wheelchair_bus_passenger_pickup_constraint);
vrpBuilder.addConstraint(new DellAmicoFixCostCalculator(vrpBuilder.getAddedJobs().size(), stateManager));
vrpBuilder.addConstraint(new VariableTransportCostCalculator(crowFlyCosts));
SolutionCostCalculator objectiveFunction = new SolutionCostCalculator() {
@Override
public double getCosts(VehicleRoutingProblemSolution solution) {
// TODO Auto-generated method stub
return 0;
}
};
//build the problem
VehicleRoutingProblem problem = vrpBuilder.build();
VehicleRoutingAlgorithmBuilder algorithmBuilder = new VehicleRoutingAlgorithmBuilder(problem, "input/algorithmConfig_noVehicleSwitch.xml");
algorithmBuilder.setObjectiveFunction(objectiveFunction);
algorithmBuilder.setStateManager(stateManager);
algorithmBuilder.addCoreConstraints();
algorithmBuilder.addVariableCostCalculator();
algorithmBuilder.addFixCostCalculator();
VehicleRoutingAlgorithm vra = algorithmBuilder.build();
/*
* get a sample algorithm.
*