HandlerFactory.java

/**
 *  Filename: HandlerFactory.java (in org.redpin.server.standalone.net)
 *  This file is part of the Redpin project.
 * 
 *  Redpin 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
 *  any later version.
 *
 *  Redpin 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 Redpin. If not, see <http://www.gnu.org/licenses/>.
 *
 *  (c) Copyright ETH Zurich, Pascal Brogle, Philipp Bolliger, 2010, ALL RIGHTS RESERVED.
 * 
 *  www.redpin.org
 */
package org.redpin.server.standalone.net;

import org.redpin.server.standalone.net.RequestHandler.RequestType;

/**
 * Factory in oder to get the different request handler
 * @author Pascal Brogle (broglep@student.ethz.ch)
 *
 */
public class HandlerFactory {
	
	/**
	 * Finds the correct {@link IHandler} for the request type. if no {@link IHandler} can be found, the {@link UnknownHandler} is returned
	 * 
	 * @param type Request type
	 * @return appropriate handler
	 */
	public static IHandler findHandler(RequestType type) {
		
		switch(type) {
			case setFingerprint:
				return getSetFingerprintHandler();
			case getMapList:
				return getGetMapHandler();
			case setMap:
				return getSetMapHandler();
			case removeMap:
				return getRemoveMapHandler();
			case getLocation:
				return getGetLocationHandler();
			case getLocationList:
				return getGetLocationListHandler();
			case updateLocation:
				return getUpdateLocationHandler();
			case removeLocation:
				return getRemoveLocationHandler();
			default:
				return getUnknownHandler();
		}
	}
	
	private static UnknownHandler unkownHandler;
	private static UnknownHandler getUnknownHandler() {
		if(unkownHandler == null) {
			unkownHandler = new UnknownHandler();
		}
		return unkownHandler;
	}

	private static SetMapHandler setMapHandler;
	private static SetMapHandler getSetMapHandler() {
		if(setMapHandler == null) {
			setMapHandler = new SetMapHandler();
		}
		return setMapHandler;
	}

	private static SetFingerprintHandler setFingerprintHandler;
	private static SetFingerprintHandler getSetFingerprintHandler() {
		if(setFingerprintHandler == null) {
			setFingerprintHandler = new SetFingerprintHandler();
		}
		
		return setFingerprintHandler;
	}


	private static GetMapListHandler getMapListHandler;
	public static GetMapListHandler getGetMapHandler() {
		if(getMapListHandler == null) {
			getMapListHandler = new GetMapListHandler();
		}
		
		return getMapListHandler;
	}
	
	private static RemoveMapHandler removeMapHandler;
	public static RemoveMapHandler getRemoveMapHandler() {
		if(removeMapHandler == null) {
			removeMapHandler = new RemoveMapHandler();
		}
		
		return removeMapHandler;
	}
	
	private static UpdateLocationHandler updateLocationHandler;
	public static UpdateLocationHandler getUpdateLocationHandler() {
		if(updateLocationHandler == null) {
			updateLocationHandler = new UpdateLocationHandler();
		}
		
		return updateLocationHandler;
		
	}
	
	private static GetLocationHandler getLocationHandler;
	public static GetLocationHandler getGetLocationHandler() {
		if(getLocationHandler == null) {
			getLocationHandler = new GetLocationHandler();
		}
		
		return getLocationHandler;

	}
	
	private static GetLocationListHandler getLocationListHandler;
	public static GetLocationListHandler getGetLocationListHandler() {
		if(getLocationListHandler == null) {
			getLocationListHandler = new GetLocationListHandler();
		}
		
		return getLocationListHandler;
	}
	
	private static RemoveLocationHandler removeLocationHandler;
	public static RemoveLocationHandler getRemoveLocationHandler() {
		if(removeLocationHandler == null) {
			removeLocationHandler = new RemoveLocationHandler();
		}
		
		return removeLocationHandler;
	}
	
	

}