refactor to a simpler model: delete BusVisit and BusStartPoint

optaplanner-examples/src/main/java/org/optaplanner/examples/coachshuttlegathering/domain/Bus.java

@@ -26,13 +26,16 @@
         Coach.class,
         Shuttle.class
 })
-public abstract class Bus extends AbstractPersistable {
+public abstract class Bus extends AbstractPersistable implements BusOrStop {
 
     protected String name;
     protected RoadLocation departureLocation;
     protected int capacity;
     protected int mileageCost;
 
+    // Shadow variables
+    protected BusStop nextStop;
+
     public String getName() {
         return name;
     }
@@ -65,10 +68,34 @@ public void setMileageCost(int mileageCost) {
         this.mileageCost = mileageCost;
     }
 
+    @Override
+    public BusStop getNextStop() {
+        return nextStop;
+    }
+
+    @Override
+    public void setNextStop(BusStop nextStop) {
+        this.nextStop = nextStop;
+    }
+
     // ************************************************************************
     // Complex methods
     // ************************************************************************
 
+    public abstract int getSetupCost();
+
+    @Override
+    public RoadLocation getLocation() {
+        return departureLocation;
+    }
+
+    @Override
+    public Bus getBus() {
+        return this;
+    }
+
+    public abstract int getDistanceFromTo(RoadLocation sourceLocation, RoadLocation targetLocation);
+
     @Override
     public String toString() {
         return name;

optaplanner-examples/src/main/java/org/optaplanner/examples/coachshuttlegathering/domain/BusHub.java

@@ -21,7 +21,7 @@
 import org.optaplanner.examples.common.domain.AbstractPersistable;
 
 @XStreamAlias("CsgBusHub")
-public class BusHub extends AbstractPersistable {
+public class BusHub extends AbstractPersistable implements StopOrHub {
 
     protected String name;
     protected RoadLocation location;

optaplanner-examples/src/main/java/org/optaplanner/examples/coachshuttlegathering/domain/BusStandstill.java → optaplanner-examples/src/main/java/org/optaplanner/examples/coachshuttlegathering/domain/BusOrStop.java

@@ -21,7 +21,7 @@
 import org.optaplanner.examples.coachshuttlegathering.domain.location.RoadLocation;
 
 @PlanningEntity
-public interface BusStandstill {
+public interface BusOrStop {
 
     /**
      * @return never null
@@ -31,13 +31,13 @@ public interface BusStandstill {
     /**
      * @return sometimes null
      */
-    BusStartPoint getStartPoint();
+    Bus getBus();
 
     /**
      * @return sometimes null
      */
-    @InverseRelationShadowVariable(sourceVariableName = "previousStandstill")
-    BusVisit getNextVisit();
-    void setNextVisit(BusVisit nextVisit);
+    @InverseRelationShadowVariable(sourceVariableName = "previousBusOrStop")
+    BusStop getNextStop();
+    void setNextStop(BusStop nextStop);
 
 }

optaplanner-examples/src/main/java/org/optaplanner/examples/coachshuttlegathering/domain/BusStop.java

@@ -17,17 +17,30 @@
 package org.optaplanner.examples.coachshuttlegathering.domain;
 
 import com.thoughtworks.xstream.annotations.XStreamAlias;
+import org.optaplanner.core.api.domain.entity.PlanningEntity;
+import org.optaplanner.core.api.domain.variable.AnchorShadowVariable;
+import org.optaplanner.core.api.domain.variable.PlanningVariable;
+import org.optaplanner.core.api.domain.variable.PlanningVariableGraphType;
 import org.optaplanner.examples.coachshuttlegathering.domain.location.RoadLocation;
+import org.optaplanner.examples.coachshuttlegathering.domain.solver.DepotAngleBusStopDifficultyWeightFactory;
 import org.optaplanner.examples.common.domain.AbstractPersistable;
 
+@PlanningEntity(difficultyWeightFactoryClass = DepotAngleBusStopDifficultyWeightFactory.class)
 @XStreamAlias("CsgBusStop")
-public class BusStop extends AbstractPersistable {
+public class BusStop extends AbstractPersistable implements BusOrStop, StopOrHub {
 
     protected String name;
     protected RoadLocation location;
     protected int passengerQuantity;
     protected int transportTimeLimit;
 
+    // Planning variables: changes during planning, between score calculations.
+    protected BusOrStop previousBusOrStop;
+
+    // Shadow variables
+    protected BusStop nextStop;
+    protected Bus bus;
+
     public String getName() {
         return name;
     }
@@ -36,6 +49,7 @@ public void setName(String name) {
         this.name = name;
     }
 
+    @Override
     public RoadLocation getLocation() {
         return location;
     }
@@ -59,10 +73,52 @@ public int getTransportTimeLimit() {
     public void setTransportTimeLimit(int transportTimeLimit) {
         this.transportTimeLimit = transportTimeLimit;
     }
+
+    @PlanningVariable(valueRangeProviderRefs = {"coachRange", "shuttleRange", "stopRange"},
+            graphType = PlanningVariableGraphType.CHAINED)
+    public BusOrStop getPreviousBusOrStop() {
+        return previousBusOrStop;
+    }
+
+    public void setPreviousBusOrStop(BusOrStop previousBusOrStop) {
+        this.previousBusOrStop = previousBusOrStop;
+    }
+
+    @Override
+    public BusStop getNextStop() {
+        return nextStop;
+    }
+
+    @Override
+    public void setNextStop(BusStop nextStop) {
+        this.nextStop = nextStop;
+    }
+
+    @AnchorShadowVariable(sourceVariableName = "previousBusOrStop")
+    @Override
+    public Bus getBus() {
+        return bus;
+    }
+
+    public void setBus(Bus bus) {
+        this.bus = bus;
+    }
+
     // ************************************************************************
     // Complex methods
     // ************************************************************************
 
+    public int getDistanceFromPreviousCost() {
+        if (previousBusOrStop == null) {
+            return 0;
+        }
+        return getDistanceFrom(previousBusOrStop) * bus.getMileageCost();
+    }
+
+    public int getDistanceFrom(BusOrStop busOrStop) {
+        return bus.getDistanceFromTo(busOrStop.getLocation(), location);
+    }
+
     @Override
     public String toString() {
         return name;

optaplanner-examples/src/main/java/org/optaplanner/examples/coachshuttlegathering/domain/Coach.java

@@ -17,6 +17,7 @@
 package org.optaplanner.examples.coachshuttlegathering.domain;
 
 import com.thoughtworks.xstream.annotations.XStreamAlias;
+import org.optaplanner.examples.coachshuttlegathering.domain.location.RoadLocation;
 import org.optaplanner.examples.common.domain.AbstractPersistable;
 
 @XStreamAlias("CsgCoach")
@@ -36,4 +37,14 @@ public void setStopLimit(int stopLimit) {
     // Complex methods
     // ************************************************************************
 
+    @Override
+    public int getSetupCost() {
+        return 0;
+    }
+
+    @Override
+    public int getDistanceFromTo(RoadLocation sourceLocation, RoadLocation targetLocation) {
+        return sourceLocation.getCoachDistanceTo(targetLocation);
+    }
+
 }