diff -r 1612dbcec451 -r 639991d0808a java/cewolf-1.0/src/main/java/de/laures/cewolf/taglib/util/DatasetProductionTimeStore.java
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/java/cewolf-1.0/src/main/java/de/laures/cewolf/taglib/util/DatasetProductionTimeStore.java	Sat Feb 28 21:31:02 2009 +0100
@@ -0,0 +1,77 @@
+/* ================================================================
+ * 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();
+    }
+    		
+}