decorator added

Author: maciej-nowak

decorator/README.md

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+# Decorator
+This is repository of http://androidcode.pl blog. It shows uses of Decorator in Android. It is a part of Design Patterns - Decorator post in the blog.

decorator/example/Main.java

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+public class Main {
+
+    public static void main() {
+
+        Avatar john = new Knight();
+        Avatar katy = new Druid();
+
+        john = new Fighter(john);
+        john = new Defender(john);
+        katy = new Magician(katy);
+
+        john.fight();
+        katy.fight();
+        //catch the result of the fight
+    }
+}

decorator/example/components/Avatar.java

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+public abstract class Avatar {
+
+    public abstract String getDescription();
+    public abstract int getPower();
+    public abstract void fight();
+}

decorator/example/components/Druid.java

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+public class Druid extends Avatar {
+
+    @Override
+    public String getDescription() {
+        return "Druid";
+    }
+
+    @Override
+    public int getPower() {
+        return 10;
+    }
+
+    @Override
+    public void fight() {
+        //use magic against opponent
+    }
+}

decorator/example/components/Knight.java

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+public class Knight extends Avatar {
+
+    @Override
+    public String getDescription() {
+        return "Knight";
+    }
+
+    @Override
+    public int getPower() {
+        return 30;
+    }
+
+    @Override
+    public void fight() {
+        //use full of power against opponent
+    }
+}

decorator/example/decorators/AvatarProfile.java

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+public abstract class AvatarProfile extends Avatar {
+
+    protected Avatar avatar;
+
+    public AvatarProfile(Avatar avatar) {
+        this.avatar = avatar;
+    }
+}

decorator/example/decorators/Defender.java

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+public class Defender extends AvatarProfile {
+
+    public Defender(Avatar avatar) {
+        super(avatar);
+    }
+
+    @Override
+    public String getDescription() {
+        return avatar.getDescription() + " Defender";
+    }
+
+    @Override
+    public int getPower() {
+        return avatar.getPower() + 15;
+    }
+
+    @Override
+    public void fight() {
+        //use shield to protect yourself
+    }
+}

decorator/example/decorators/Fighter.java

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+public class Fighter extends AvatarProfile {
+
+    public Fighter(Avatar avatar) {
+        super(avatar);
+    }
+
+    @Override
+    public String getDescription() {
+        return avatar.getDescription() + " Fighter";
+    }
+
+    @Override
+    public int getPower() {
+        return avatar.getPower() + 25;
+    }
+
+    @Override
+    public void fight() {
+        //use sword to attack an opponent
+    }
+}

decorator/example/decorators/Magician.java

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+public class Magician extends AvatarProfile {
+
+    public Magician(Avatar avatar) {
+        super(avatar);
+    }
+
+    @Override
+    public String getDescription() {
+        return avatar.getDescription() + " Magician";
+    }
+
+    @Override
+    public int getPower() {
+        return avatar.getPower() + 5;
+    }
+
+    @Override
+    public void fight() {
+        //cast spells to be invisible
+    }
+}

decorator/pattern/Component.java

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+public abstract class Component {
+
+    protected String name;
+
+    public String getName() {
+        return name;
+    }
+
+    public abstract int getValue();
+}