Developing TicToe HTML5/Implementing Server Entities: Difference between revisions

== Factory ==

The last step is to make our entities known to Marauroa. Therefore we create a new ObjectFactory implementation called net.sf.arianne.tictoe.server.core.TicToeObjectFactory. While this does the same thing as the object factory on the client side, the syntax is a bit different:

<source lang="java">

package net.sf.arianne.tictoe.server.core;

import marauroa.common.game.RPClass;

import marauroa.common.game.RPObject;

import marauroa.server.game.rp.RPObjectFactory;

import net.sf.arianne.tictoe.server.entity.Gameboard;

import net.sf.arianne.tictoe.server.entity.Player;

import net.sf.arianne.tictoe.server.entity.Token;

/**

* Creates concrete objects of entities.

*/

public class TicToeObjectFactory extends RPObjectFactory {

private static RPObjectFactory singleton;

/**

* returns the factory instance (this method is called

* by Marauroa using reflection).

*

* @return RPObjectFactory

*/

public static RPObjectFactory getFactory() {

if (singleton == null) {

singleton = new TicToeObjectFactory();

}

return singleton;

}

@Override

public RPObject transform(final RPObject object) {

final RPClass clazz = object.getRPClass();

if (clazz == null) {

return super.transform(object);

}

final String name = clazz.getName();

if (name.equals("player")) {

return new Player(object);

} else if (name.equals("gameboard")) {

return new Gameboard(object);

} else if (name.equals("token")) {

return new Token(object);

}

return super.transform(object);

}

}

</source>

This is a very simple implementation of the transform method, but as we only have 3 entities, this is okay for now. Complex programs usually replace the if/else-if construct with a registration mechanism.

This new class has to be added to server.ini:

<source lang="ini">

factory_implementation=net.sf.arianne.tictoe.server.core.TicToeObjectFactory

</source>