Make Command an abstract class

src/edu/kit/informatik/ui/command/AddSwitch.java

@@ -10,7 +10,7 @@ import edu.kit.informatik.Terminal;
  * @author Arne Keller
  * @version 1.0
  */
-public class AddSwitch implements Command {
+public class AddSwitch extends Command {
     /**
      * Start position of the switch to add.
      */
@@ -37,6 +37,7 @@ public class AddSwitch implements Command {
         this.end2 = new Vector2D(end2);
     }
 
+    @Override
     public void apply(final ModelRailwaySimulation simulation) {
         int id = simulation.addSwitch(start, end1, end2);
         if (id == -1) {

src/edu/kit/informatik/ui/command/AddTrack.java

@@ -10,7 +10,7 @@ import edu.kit.informatik.Terminal;
  * @author Arne Keller
  * @version 1.0
  */
-public class AddTrack implements Command {
+public class AddTrack extends Command {
     /**
      * Start position of the new track.
      */
@@ -31,6 +31,7 @@ public class AddTrack implements Command {
         this.end = new Vector2D(end);
     }
 
+    @Override
     public void apply(final ModelRailwaySimulation simulation) {
         if (start.equals(end)) {
             Terminal.printError("track has length 0");

src/edu/kit/informatik/ui/command/AddTrain.java

@@ -10,7 +10,7 @@ import edu.kit.informatik.Terminal;
  * @author Arne Keller
  * @version 1.0
  */
-public class AddTrain implements Command {
+public class AddTrain extends Command {
     /**
      * Identifier of the train to add or modify.
      */
@@ -30,6 +30,7 @@ public class AddTrain implements Command {
         this.rollingStockId = rollingStockId;
     }
 
+    @Override
     public void apply(final ModelRailwaySimulation simulation) {
         if (simulation.addTrain(trainId, rollingStockId)) {
             RollingStock rollingStock = simulation.getRollingStock(rollingStockId);

src/edu/kit/informatik/ui/command/Command.java

@@ -4,15 +4,15 @@ import edu.kit.informatik.model.ModelRailwaySimulation;
 
 /**
  * Command that can be applied to a simulation.
- * Commands are implemented as separate classes to avoid a god enum :)
+ * Commands are implemented as separate classes (to avoid a god enum).
  *
  * @author Arne Keller
  * @version 1.0
  */
-public interface Command {
+public abstract class Command {
     /**
      * Apply this command to a model railway simulation.
      * @param simulation simulation to use
      */
-    void apply(ModelRailwaySimulation simulation);
+    public abstract void apply(ModelRailwaySimulation simulation);
 }

src/edu/kit/informatik/ui/command/CreateCoach.java

@@ -10,7 +10,7 @@ import edu.kit.informatik.Terminal;
  * @author Arne Keller
  * @version 1.0
  */
-public class CreateCoach implements Command {
+public class CreateCoach extends Command {
     /**
      * Type of the new coach.
      */
@@ -46,6 +46,7 @@ public class CreateCoach implements Command {
         this.couplingBack = couplingBack;
     }
 
+    @Override
     public void apply(final ModelRailwaySimulation simulation) {
         int id = simulation.createCoach(type, length, couplingFront, couplingBack);
         if (id == -1) {

src/edu/kit/informatik/ui/command/CreateEngine.java

@@ -14,7 +14,7 @@ import edu.kit.informatik.ui.EngineType;
  * @author Arne Keller
  * @version 1.0
  */
-public class CreateEngine implements Command {
+public class CreateEngine extends Command {
     /**
      * Type of the new engine.
      */
@@ -62,6 +62,7 @@ public class CreateEngine implements Command {
         this.couplingBack = couplingBack;
     }
 
+    @Override
     public void apply(final ModelRailwaySimulation simulation) {
         Engine engine;
         switch (type) {

src/edu/kit/informatik/ui/command/CreateTrainSet.java

@@ -10,7 +10,7 @@ import edu.kit.informatik.model.TrainSet;
  * @author Arne Keller
  * @version Arne Keller
  */
-public class CreateTrainSet implements Command {
+public class CreateTrainSet extends Command {
     /**
      * Series (class) of the new train set.
      */
@@ -49,6 +49,7 @@ public class CreateTrainSet implements Command {
         this.couplingBack = couplingBack;
     }
 
+    @Override
     public void apply(final ModelRailwaySimulation simulation) {
         TrainSet trainSet = new TrainSet(series, name, length, couplingFront, couplingBack);
         if (simulation.createTrainSet(trainSet)) {

src/edu/kit/informatik/ui/command/DeleteRollingStock.java

@@ -9,7 +9,7 @@ import edu.kit.informatik.Terminal;
  * @author Arne Keller
  * @version 1.0
  */
-public class DeleteRollingStock implements Command {
+public class DeleteRollingStock extends Command {
     /**
      * Identifier of the rolling stock to delete.
      */
@@ -23,6 +23,7 @@ public class DeleteRollingStock implements Command {
         this.id = id;
     }
 
+    @Override
     public void apply(final ModelRailwaySimulation simulation) {
         if (simulation.deleteRollingStock(id)) {
             Terminal.printLine("OK");

src/edu/kit/informatik/ui/command/DeleteTrack.java

@@ -9,7 +9,7 @@ import edu.kit.informatik.Terminal;
  * @author Arne Keller
  * @version 1.0
  */
-public class DeleteTrack implements Command {
+public class DeleteTrack extends Command {
     /**
      * Identifier of the rail to delete.
      */
@@ -23,6 +23,7 @@ public class DeleteTrack implements Command {
         this.id = id;
     }
 
+    @Override
     public void apply(final ModelRailwaySimulation simulation) {
         if (simulation.removeRail(id)) {
             Terminal.printLine("OK");

src/edu/kit/informatik/ui/command/DeleteTrain.java

@@ -9,7 +9,7 @@ import edu.kit.informatik.Terminal;
  * @author Arne Keller
  * @version 1.0
  */
-public class DeleteTrain implements Command {
+public class DeleteTrain extends Command {
     /**
      * Identifer of the train to delete.
      */
@@ -23,6 +23,7 @@ public class DeleteTrain implements Command {
         this.id = id;
     }
 
+    @Override
     public void apply(final ModelRailwaySimulation simulation) {
         if (simulation.deleteTrain(id)) {
             Terminal.printLine("OK");

src/edu/kit/informatik/ui/command/ListCoaches.java

@@ -8,7 +8,8 @@ import edu.kit.informatik.model.ModelRailwaySimulation;
  * @author Arne Keller
  * @version 1.0
  */
-public class ListCoaches implements Command {
+public class ListCoaches extends Command {
+    @Override
     public void apply(final ModelRailwaySimulation simulation) {
         simulation.printCoaches();
     }

src/edu/kit/informatik/ui/command/ListEngines.java

@@ -8,7 +8,8 @@ import edu.kit.informatik.model.ModelRailwaySimulation;
  * @author Arne Keller
  * @version 1.0
  */
-public class ListEngines implements Command {
+public class ListEngines extends Command {
+    @Override
     public void apply(final ModelRailwaySimulation simulation) {
         simulation.printEngines();
     }

src/edu/kit/informatik/ui/command/ListTracks.java

@@ -8,7 +8,8 @@ import edu.kit.informatik.model.ModelRailwaySimulation;
  * @author Arne Keller
  * @version 1.0
  */
-public class ListTracks implements Command {
+public class ListTracks extends Command {
+    @Override
     public void apply(final ModelRailwaySimulation simulation) {
         simulation.printTracks();
     }

src/edu/kit/informatik/ui/command/ListTrainSets.java

@@ -8,7 +8,8 @@ import edu.kit.informatik.model.ModelRailwaySimulation;
  * @author Arne Keller
  * @version 1.0
  */
-public class ListTrainSets implements Command {
+public class ListTrainSets extends Command {
+    @Override
     public void apply(final ModelRailwaySimulation simulation) {
         simulation.printTrainSets();
     }

src/edu/kit/informatik/ui/command/ListTrains.java

@@ -8,7 +8,8 @@ import edu.kit.informatik.model.ModelRailwaySimulation;
  * @author Arne Keller
  * @version 1.0
  */
-public class ListTrains implements Command {
+public class ListTrains extends Command {
+    @Override
     public void apply(final ModelRailwaySimulation simulation) {
         simulation.printTrains();
     }

src/edu/kit/informatik/ui/command/PutTrain.java

@@ -10,7 +10,7 @@ import edu.kit.informatik.Terminal;
  * @author Arne Keller
  * @version 1.0
  */
-public class PutTrain implements Command {
+public class PutTrain extends Command {
     private final int id;
     private final Vector2D point;
     private final int x;
@@ -30,6 +30,7 @@ public class PutTrain implements Command {
         this.y = y;
     }
 
+    @Override
     public void apply(final ModelRailwaySimulation simulation) {
         if (simulation.putTrain(id, point, new Vector2D(x, y))) {
             Terminal.printLine("OK");

src/edu/kit/informatik/ui/command/SetSwitch.java

@@ -10,7 +10,7 @@ import edu.kit.informatik.Terminal;
  * @author Arne Keller
  * @version 1.0
  */
-public class SetSwitch implements Command {
+public class SetSwitch extends Command {
     private final int id;
     private final Vector2D point;
 
@@ -24,6 +24,7 @@ public class SetSwitch implements Command {
         this.point = point;
     }
 
+    @Override
     public void apply(final ModelRailwaySimulation simulation) {
         if (simulation.setSwitch(id, point)) {
             Terminal.printLine("OK");

src/edu/kit/informatik/ui/command/ShowTrain.java

@@ -8,7 +8,7 @@ import edu.kit.informatik.model.ModelRailwaySimulation;
  * @author Arne Keller
  * @version 1.0
  */
-public class ShowTrain implements Command {
+public class ShowTrain extends Command {
     private final int id;
 
     /**
@@ -19,6 +19,7 @@ public class ShowTrain implements Command {
         this.id = id;
     }
 
+    @Override
     public void apply(final ModelRailwaySimulation simulation) {
         simulation.printTrain(id);
     }

src/edu/kit/informatik/ui/command/Step.java

@@ -8,7 +8,7 @@ import edu.kit.informatik.model.ModelRailwaySimulation;
  * @author Arne Keller
  * @version 1.0
  */
-public class Step implements Command {
+public class Step extends Command {
     private final short speed;
 
     /**
@@ -19,6 +19,7 @@ public class Step implements Command {
         this.speed = speed;
     }
 
+    @Override
     public void apply(final ModelRailwaySimulation simulation) {
         simulation.step(speed);
     }