SceneLoader.java

/**
 * eAdventure (formerly <e-Adventure> and <e-Game>) is a research project of the
 *    <e-UCM> research group.
 *
 *    Copyright 2005-2010 <e-UCM> research group.
 *
 *    You can access a list of all the contributors to eAdventure at:
 *          http://e-adventure.e-ucm.es/contributors
 *
 *    <e-UCM> is a research group of the Department of Software Engineering
 *          and Artificial Intelligence at the Complutense University of Madrid
 *          (School of Computer Science).
 *
 *          C Profesor Jose Garcia Santesmases sn,
 *          28040 Madrid (Madrid), Spain.
 *
 *          For more info please visit:  <http://e-adventure.e-ucm.es> or
 *          <http://www.e-ucm.es>
 *
 * ****************************************************************************
 *
 *  This file is part of eAdventure, version 2.0
 *
 *      eAdventure is free software: you can redistribute it and/or modify
 *      it under the terms of the GNU Lesser General Public License as published by
 *      the Free Software Foundation, either version 3 of the License, or
 *      (at your option) any later version.
 *
 *      eAdventure is distributed in the hope that it will be useful,
 *      but WITHOUT ANY WARRANTY; without even the implied warranty of
 *      MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *      GNU Lesser General Public License for more details.
 *
 *      You should have received a copy of the GNU Lesser General Public License
 *      along with eAdventure.  If not, see <http://www.gnu.org/licenses/>.
 */

package es.eucm.ead.engine.gameobjects.sceneelements.transitions.sceneloaders;

import es.eucm.ead.engine.gameobjects.sceneelements.SceneGO;
import es.eucm.ead.model.elements.scenes.Scene;

/**
 * Implemented by those classes loading scenes assets
 * 
 */
public interface SceneLoader {

	/**
	 * Loads the scene assets.
	 * 
	 * @param scene
	 *            The scene to load
	 * @param listener
	 *            the listener will be notices when the load is complete
	 */
	void loadScene(Scene scene, SceneLoaderListener listener);

	/**
	 * Frees all the assets contained by the scene, and not used by the
	 * currentScene
	 * @param currentScene
	 *            the current scene
	 */
	void freeUnusedAssets(SceneGO currentScene, SceneGO oldScene);

	/**
	 * The scene loader gets permission to one more step in its loading process
	 */
	void step();

}