PropertyMethods.java

/**
 * Copyright (C) 2008 - 2014 52°North Initiative for Geospatial Open Source
 * Software GmbH
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 as published
 * by the Free Software Foundation.
 *
 * If the program is linked with libraries which are licensed under one of
 * the following licenses, the combination of the program with the linked
 * library is not considered a "derivative work" of the program:
 *
 *     - Apache License, version 2.0
 *     - Apache Software License, version 1.0
 *     - GNU Lesser General Public License, version 3
 *     - Mozilla Public License, versions 1.0, 1.1 and 2.0
 *     - Common Development and Distribution License (CDDL), version 1.0
 *
 * Therefore the distribution of the program linked with libraries licensed
 * under the aforementioned licenses, is permitted by the copyright holders
 * if the distribution is compliant with both the GNU General Public
 * icense version 2 and the aforementioned licenses.
 *
 * This program 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 General
 * Public License for more details.
 */
package org.n52.ses.eml.v001.filterlogic.esper.customFunctions;

import java.util.Map;

/**
 * Provides methods to check properties
 */
public class PropertyMethods {
	
	/**
	 * check if a property exists
	 * 
	 * @param event the event that should contain the property
	 * @param propertyName the property name
	 * 
	 * @return true, if the event contains the property
	 */
	@SuppressWarnings("rawtypes")
	public static boolean propertyExists(Object event, Object propertyName) {
		Map eventMap = (Map) event;
		if (eventMap.containsKey(propertyName.toString())) {
			if (eventMap.get(propertyName.toString()) == null) {
				return false;
			}
		}
		else {
			return false;
		}
		return true;
	}
	

}