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Completed Double Dispatch example.

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This commit is contained in:
Ilkka Seppala 2015-05-08 21:49:04 +03:00
parent fba664ba49
commit 8c13dd0e10
6 changed files with 86 additions and 3 deletions
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14
double-dispatch/src/main/java/com/iluwatar/App.java
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@ -8,9 +8,17 @@ public class App {
public static void main( String[] args ) {
List<GameObject> objects = new ArrayList<>();
objects.add(new FlamingAsteroid(0, 0, 5, 5));
objects.add(new SpaceStationMir(1, 1, 4, 4));
objects.add(new SpaceStationMir(1, 1, 2, 2));
objects.add(new Meteoroid(10, 10, 15, 15));
objects.add(new SpaceStationIss(12, 11, 14, 15));
objects.stream().forEach(o1 -> objects.stream().forEach(o2 -> { if (o1 != o2) System.out.println(String.format("%s -> %s", o1, o2)); } ));
objects.add(new SpaceStationIss(12, 12, 14, 14));
objects.stream().forEach(o -> System.out.println(o));
System.out.println("");
objects.stream().forEach(o1 -> objects.stream().forEach(o2 -> { if (o1 != o2 && o1.intersectsWith(o2)) o1.collision(o2); } ));
System.out.println("");
objects.stream().forEach(o -> System.out.println(o));
System.out.println("");
}
}

5
double-dispatch/src/main/java/com/iluwatar/FlamingAsteroid.java
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@ -6,4 +6,9 @@ public class FlamingAsteroid extends Meteoroid {
super(left, top, right, bottom);
setOnFire(true);
}
@Override
public void collision(GameObject gameObject) {
gameObject.collisionResolve(this);
}
}

10
double-dispatch/src/main/java/com/iluwatar/GameObject.java
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@ -30,4 +30,14 @@ public abstract class GameObject extends Rectangle {
public void setDamaged(boolean damaged) {
this.damaged = damaged;
}
public abstract void collision(GameObject gameObject);
public abstract void collisionResolve(FlamingAsteroid asteroid);
public abstract void collisionResolve(Meteoroid meteoroid);
public abstract void collisionResolve(SpaceStationMir mir);
public abstract void collisionResolve(SpaceStationIss iss);
}

25
double-dispatch/src/main/java/com/iluwatar/Meteoroid.java
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@ -5,4 +5,29 @@ public class Meteoroid extends GameObject {
public Meteoroid(int left, int top, int right, int bottom) {
super(left, top, right, bottom);
}
@Override
public void collision(GameObject gameObject) {
gameObject.collisionResolve(this);
}
@Override
public void collisionResolve(FlamingAsteroid asteroid) {
System.out.println(String.format("%s hits %s", asteroid.getClass().getSimpleName(), this.getClass().getSimpleName()));
}
@Override
public void collisionResolve(Meteoroid meteoroid) {
System.out.println(String.format("%s hits %s", meteoroid.getClass().getSimpleName(), this.getClass().getSimpleName()));
}
@Override
public void collisionResolve(SpaceStationMir mir) {
System.out.println(String.format("%s hits %s", mir.getClass().getSimpleName(), this.getClass().getSimpleName()));
}
@Override
public void collisionResolve(SpaceStationIss iss) {
System.out.println(String.format("%s hits %s", iss.getClass().getSimpleName(), this.getClass().getSimpleName()));
}
}

5
double-dispatch/src/main/java/com/iluwatar/SpaceStationIss.java
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@ -5,4 +5,9 @@ public class SpaceStationIss extends SpaceStationMir {
public SpaceStationIss(int left, int top, int right, int bottom) {
super(left, top, right, bottom);
}
@Override
public void collision(GameObject gameObject) {
gameObject.collisionResolve(this);
}
}

30
double-dispatch/src/main/java/com/iluwatar/SpaceStationMir.java
View File

@ -5,4 +5,34 @@ public class SpaceStationMir extends GameObject {
public SpaceStationMir(int left, int top, int right, int bottom) {
super(left, top, right, bottom);
}
@Override
public void collision(GameObject gameObject) {
gameObject.collisionResolve(this);
}
@Override
public void collisionResolve(FlamingAsteroid asteroid) {
System.out.println(String.format("%s hits %s", asteroid.getClass().getSimpleName(), this.getClass().getSimpleName()));
setDamaged(true);
setOnFire(true);
}
@Override
public void collisionResolve(Meteoroid meteoroid) {
System.out.println(String.format("%s hits %s", meteoroid.getClass().getSimpleName(), this.getClass().getSimpleName()));
setDamaged(true);
}
@Override
public void collisionResolve(SpaceStationMir mir) {
System.out.println(String.format("%s hits %s", mir.getClass().getSimpleName(), this.getClass().getSimpleName()));
setDamaged(true);
}
@Override
public void collisionResolve(SpaceStationIss iss) {
System.out.println(String.format("%s hits %s", iss.getClass().getSimpleName(), this.getClass().getSimpleName()));
setDamaged(true);
}
}