SceneGraph.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.writer.model.writers;

import es.eucm.ead.model.elements.effects.ChangeSceneEf;
import es.eucm.ead.model.elements.extra.EAdList;
import es.eucm.ead.model.elements.extra.EAdMap;
import es.eucm.ead.model.elements.scenes.Scene;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

public class SceneGraph {

	static private Logger logger = LoggerFactory.getLogger(SceneGraph.class);

	private EAdMap<EAdList<String>> graph;

	private String currentScene;

	public SceneGraph() {
		graph = new EAdMap<EAdList<String>>();
	}

	public void process(Object o) {
		if (o instanceof Scene) {
			currentScene = ((Scene) o).getId();
		} else if (o instanceof ChangeSceneEf) {
			String nextScene = ((ChangeSceneEf) o).getNextSceneId();
			addConnection(nextScene);
		}
	}

	private void addConnection(String nextScene) {
		if (currentScene == null) {
			logger
					.warn("Found change scene with current scene set to null. Weird.");
		} else {
			EAdList<String> connections = graph.get(currentScene);
			if (connections == null) {
				connections = new EAdList<String>();
				graph.put(currentScene, connections);
			}
			if (!connections.contains(nextScene)) {
				logger.debug("{} -> {}",
						new Object[] { currentScene, nextScene });
				connections.add(nextScene);
			}
		}
	}

	public EAdMap<EAdList<String>> getGraph() {
		return graph;
	}

	public void clear() {
		currentScene = null;
		graph.clear();
	}
}