ListedCondEvaluator.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.operators.evaluators;

import com.google.inject.Inject;
import com.google.inject.Singleton;
import es.eucm.ead.model.elements.conditions.Condition;
import es.eucm.ead.model.elements.conditions.ListedCond;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import java.util.Iterator;

@Singleton
public class ListedCondEvaluator implements Evaluator<ListedCond> {

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

	private EvaluatorFactory evaluatorFactory;

	@Inject
	public ListedCondEvaluator(EvaluatorFactory evaluatorFactory) {
		this.evaluatorFactory = evaluatorFactory;
	}

	@Override
	public boolean evaluate(ListedCond condition) {
		boolean temp = false;
		if (condition.getNullOperator().getValue())
			temp = true;

		Iterator<Condition> conditions = condition.getConditionsIterator();
		while (conditions.hasNext()) {
			Condition cond = conditions.next();
			boolean temp2 = evaluatorFactory.evaluate(cond);
			switch (condition.getOperator()) {
			case AND:
				temp = temp && temp2;
				break;
			case OR:
				temp = temp || temp2;
				break;
			default:
				logger.warn("No valid operator, condition: '{}'", condition);
			}
		}
		return temp;
	}

}