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Code Issues Releases Wiki Activity

add infrastructure to easily add soft and hard constraints

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This commit is contained in:
Stefan Schroeder 2013-11-29 15:31:02 +01:00
parent e5e5783d67
commit f1213994e4
8 changed files with 62 additions and 3 deletions
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2
jsprit-core/src/main/java/jsprit/core/algorithm/io/VehicleRoutingAlgorithms.java
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@ -492,7 +492,7 @@ public class VehicleRoutingAlgorithms {
* define constraints
*/
//constraint manager
ConstraintManager constraintManager = new ConstraintManager(vrp,stateManager);
ConstraintManager constraintManager = new ConstraintManager(vrp,stateManager,vrp.getConstraints());
constraintManager.addTimeWindowConstraint();
constraintManager.addLoadConstraint();

14
jsprit-core/src/main/java/jsprit/core/problem/VehicleRoutingProblem.java
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@ -118,6 +118,8 @@ public class VehicleRoutingProblem {
private Collection<Constraint> problemConstraints;
private Collection<jsprit.core.problem.constraint.Constraint> constraints;
/**
* by default all locations are neighbors
*/
@ -136,6 +138,7 @@ public class VehicleRoutingProblem {
vehicleTypes = new ArrayList<VehicleType>();
services = new ArrayList<Service>();
problemConstraints = new ArrayList<VehicleRoutingProblem.Constraint>();
constraints = new ArrayList<jsprit.core.problem.constraint.Constraint>();
}
/**
@ -388,6 +391,10 @@ public class VehicleRoutingProblem {
return Collections.unmodifiableCollection(vehicles);
}
public void addConstraint(jsprit.core.problem.constraint.Constraint constraint){
constraints.add(constraint);
}
/**
* Gets an unmodifiable collection of already added services.
*
@ -456,6 +463,8 @@ public class VehicleRoutingProblem {
private Collection<Constraint> problemConstraints;
private Collection<jsprit.core.problem.constraint.Constraint> constraints;
private VehicleRoutingProblem(Builder builder) {
this.jobs = builder.jobs;
this.fleetComposition = builder.fleetComposition;
@ -466,6 +475,7 @@ public class VehicleRoutingProblem {
this.activityCosts = builder.activityCosts;
this.neighborhood = builder.neighborhood;
this.problemConstraints = builder.problemConstraints;
this.constraints = builder.constraints;
logger.info("initialise " + this);
}
@ -558,5 +568,9 @@ public class VehicleRoutingProblem {
return activityCosts;
}
public Collection<jsprit.core.problem.constraint.Constraint> getConstraints(){
return Collections.unmodifiableCollection(constraints);
}
}

5
jsprit-core/src/main/java/jsprit/core/problem/constraint/Constraint.java Normal file
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@ -0,0 +1,5 @@
package jsprit.core.problem.constraint;
public interface Constraint {
}

30
jsprit-core/src/main/java/jsprit/core/problem/constraint/ConstraintManager.java
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@ -1,5 +1,9 @@
package jsprit.core.problem.constraint;
import java.util.Collection;
import org.apache.log4j.Logger;
import jsprit.core.problem.VehicleRoutingProblem;
import jsprit.core.problem.VehicleRoutingProblem.Constraint;
import jsprit.core.problem.misc.JobInsertionContext;
@ -12,6 +16,8 @@ public class ConstraintManager implements HardActivityStateLevelConstraint, Hard
CRITICAL, HIGH, LOW
}
private static Logger log = Logger.getLogger(ConstraintManager.class);
private HardActivityLevelConstraintManager actLevelConstraintManager = new HardActivityLevelConstraintManager();
private HardRouteLevelConstraintManager routeLevelConstraintManager = new HardRouteLevelConstraintManager();
@ -29,6 +35,30 @@ public class ConstraintManager implements HardActivityStateLevelConstraint, Hard
this.stateManager = stateManager;
}
public ConstraintManager(VehicleRoutingProblem vrp, RouteAndActivityStateGetter stateManager, Collection<jsprit.core.problem.constraint.Constraint> constraints) {
this.vrp = vrp;
this.stateManager = stateManager;
resolveConstraints(constraints);
}
private void resolveConstraints(Collection<jsprit.core.problem.constraint.Constraint> constraints) {
for(jsprit.core.problem.constraint.Constraint c : constraints){
boolean constraintTypeKnown = false;
if(c instanceof HardActivityStateLevelConstraint) {
actLevelConstraintManager.addConstraint((HardActivityStateLevelConstraint) c, Priority.HIGH);
constraintTypeKnown = true;
}
if(c instanceof HardRouteStateLevelConstraint) {
routeLevelConstraintManager.addConstraint((HardRouteStateLevelConstraint) c);
constraintTypeKnown = true;
}
if(!constraintTypeKnown){
log.warn("constraint " + c + " unknown thus ignores the constraint. currently, a constraint must implement either HardActivityStateLevelConstraint or HardRouteStateLevelConstraint");
}
}
}
public void addTimeWindowConstraint(){
if(!timeWindowConstraintsSet){
addConstraint(new TimeWindowConstraint(stateManager, vrp.getTransportCosts()),Priority.HIGH);

2
jsprit-core/src/main/java/jsprit/core/problem/constraint/HardActivityStateLevelConstraint.java
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@ -3,7 +3,7 @@ package jsprit.core.problem.constraint;
import jsprit.core.problem.misc.JobInsertionContext;
import jsprit.core.problem.solution.route.activity.TourActivity;
public interface HardActivityStateLevelConstraint {
public interface HardActivityStateLevelConstraint extends HardConstraint{
static enum ConstraintsStatus {

5
jsprit-core/src/main/java/jsprit/core/problem/constraint/HardConstraint.java Normal file
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@ -0,0 +1,5 @@
package jsprit.core.problem.constraint;
public interface HardConstraint extends Constraint{
}

2
jsprit-core/src/main/java/jsprit/core/problem/constraint/HardRouteStateLevelConstraint.java
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@ -3,7 +3,7 @@ package jsprit.core.problem.constraint;
import jsprit.core.problem.misc.JobInsertionContext;
public interface HardRouteStateLevelConstraint {
public interface HardRouteStateLevelConstraint extends HardConstraint{
public boolean fulfilled(JobInsertionContext insertionContext);

5
jsprit-core/src/main/java/jsprit/core/problem/constraint/SoftConstraint.java Normal file
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@ -0,0 +1,5 @@
package jsprit.core.problem.constraint;
public interface SoftConstraint extends Constraint{
}