/***********************************************************************

 * mt4j Copyright (c) 2008 - 2009, C.Ruff, Fraunhofer-Gesellschaft All rights reserved.

 *  

 *   This program is free software: you can redistribute it and/or modify

 *   it under the terms of the GNU General Public License as published by

 *   the Free Software Foundation, either version 3 of the License, or

 *   (at your option) any later version.

 *

 *   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.

 *

 *   You should have received a copy of the GNU General Public License

 *   along with this program.  If not, see <http://www.gnu.org/licenses/>.

 *

 ***********************************************************************/

package org.mt4j.input.inputData;



import java.util.Collection;

import java.util.HashMap;

import java.util.Map;







/**

 * This class is basically a centralized wrapper for a HashMap acting as a store

 * for active inputs.

 * cursors are added when a new Touch is registered. cursors should be put in the map by

 * using their cursor-ID. When the cursor has ended they have to be removed again.

 * 

 * @author Christopher Ruff

 */

public class ActiveCursorPool {

	

	/** The cursor pool. */

	private static ActiveCursorPool cursorPool;

	

	/** The cursors map. */

	private Map<Long, InputCursor> cursorMap;

	

	/**

	 * Instantiates a new cursor pool.

	 */

	private ActiveCursorPool(){

		cursorMap = new HashMap<Long, InputCursor>();

//		cursorMap = new WeakHashMap<Long, InputCursor>();

	}

	

	/**

	 * Gets the single instance of cursorPool.

	 * 

	 * @return single instance of cursorPool

	 */

	public static ActiveCursorPool getInstance(){

		if (cursorPool == null){

			cursorPool = new ActiveCursorPool();

			return cursorPool;

		}else{

			return cursorPool;

		}

	}



	

	/**

	 * Put cursor. The id is assumed to be the cursors ID.

	 * 

	 * @param cursorID the cursor id

	 * @param m the m

	 */ //TODO automate because id = cursorID?

	public void putActiveCursor(long cursorID, InputCursor m){

		cursorMap.put(cursorID, m);

	}

	

	

	/**

	 * Gets the cursor by id.

	 * 

	 * @param ID the iD

	 * 

	 * @return the cursor by id

	 */

	public InputCursor getActiveCursorByID(long ID){

		return cursorMap.get(ID);

	}

	

	public InputCursor[] getActiveCursors(){

		Collection<InputCursor> values = cursorMap.values();

		return values.toArray(new InputCursor[values.size()]);

		/*

		Set<Long> keys = cursorsMap.keySet();

		for (Iterator iterator = keys.iterator(); iterator.hasNext();) {

			Long long1 = (Long) iterator.next();

			Inputcursor cursor = cursorsMap.get(long1);

			MTCursorInputEvt lastEvt = cursor.getLastEvent();

			MTCursorInputEvt copy = (MTCursorInputEvt) lastEvt.clone();

			copy.setId(MTCursorInputEvt.INPUT_ENDED);

			

		}

		return null;

		*/

	}

	

	

	/**

	 * Removes the cursor.

	 * 

	 * @param ID the iD

	 * @return the input cursor

	 */

	public InputCursor removeCursor(long ID){

		return cursorMap.remove(ID);

	}

	

	/**

	 * Gets the active cursor count.

	 * 

	 * @return the active cursor count

	 */

	public long getActiveCursorCount(){

		return cursorMap.size();

	}

	

	

	



	

}