/* ================================================================

 * Cewolf : Chart enabling Web Objects Framework

 * ================================================================

 *

 * Project Info:  http://cewolf.sourceforge.net

 * Project Lead:  Guido Laures (guido@laures.de);

 *

 * (C) Copyright 2002, by Guido Laures

 *

 * This library 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 2.1 of the License, or (at your option) any later version.

 *

 * This library 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 this

 * library; if not, write to the Free Software Foundation, Inc., 59 Temple Place, Suite 330,

 * Boston, MA 02111-1307, USA.

 */

package de.laures.cewolf.taglib.util;

import java.util.Date;

import java.util.Hashtable;

import java.util.Iterator;

import java.util.Map;

import org.apache.commons.logging.Log;

import org.apache.commons.logging.LogFactory;

/**

 * @author glaures

 */

public class DatasetProductionTimeStore extends Hashtable {

    private static final DatasetProductionTimeStore instance = new DatasetProductionTimeStore();

    private static final Log log = LogFactory.getLog(DatasetProductionTimeStore.class);

    public static final DatasetProductionTimeStore getInstance() {

        return instance;

    }

    private DatasetProductionTimeStore() {

    }

    public boolean containsEntry(String producerId, Map params) {

        return containsKey(new DatasetProductionTimesKey(producerId, params));

    }

    public void addEntry(String producerId, Map params, Date produceTime) {

      log.debug("add entry: " + producerId);

        put(new DatasetProductionTimesKey(producerId, params), produceTime);

    }

    public void removeEntry(String producerId, Map params) {

      log.debug("remove entry: " + producerId);

        remove(new DatasetProductionTimesKey(producerId, params));

    }

    public Date getProductionTime(String producerId, Map params) {

        return (Date) get(new DatasetProductionTimesKey(producerId, params));

    }

    public String paramsToString(Map params){

    	Iterator it = params.keySet().iterator();

    	StringBuffer buf = new StringBuffer("[");

    	while(it.hasNext()){

    		String key = (String)it.next();

    		buf.append(key + ":" + params.get(key));

    	}

    	buf.append("]");

    	return buf.toString();

    }

}