diff -r 1612dbcec451 -r 639991d0808a java/cewolf-1.0/src/main/java/de/laures/cewolf/taglib/util/DatasetProductionTimesKey.java
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/java/cewolf-1.0/src/main/java/de/laures/cewolf/taglib/util/DatasetProductionTimesKey.java	Sat Feb 28 21:31:02 2009 +0100
@@ -0,0 +1,66 @@
+/* ================================================================
+ * 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.io.Serializable;
+import java.util.Map;
+
+import org.apache.commons.logging.Log;
+import org.apache.commons.logging.LogFactory;
+
+/**
+ * @author glaures
+ */
+class DatasetProductionTimesKey implements Serializable {
+	
+    private static final Log log = LogFactory.getLog(DatasetProductionTimesKey.class);
+
+	private final transient int key;
+	
+	public DatasetProductionTimesKey(String producerId, Map params){
+		key = KeyGenerator.generateKey((Serializable) params);
+		log.debug("data key is " + key + " producerId=" + producerId);
+	}
+	
+	public int getKey(){
+		return key;
+	}
+	
+	public String toString() {
+		return String.valueOf(key);
+	}
+	
+	public int hashCode() {
+		return key;
+	}
+	
+	public boolean equals(Object o) {
+		if (this == o) {
+			return true;
+		}
+		if (o instanceof DatasetProductionTimesKey) {
+			return key == ((DatasetProductionTimesKey) o).getKey();
+		}
+		return false;
+	}
+}