diff -r 1612dbcec451 -r 639991d0808a java/cewolf-1.0/src/main/java/de/laures/cewolf/taglib/tags/ProducerTag.java
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/java/cewolf-1.0/src/main/java/de/laures/cewolf/taglib/tags/ProducerTag.java	Sat Feb 28 21:31:02 2009 +0100
@@ -0,0 +1,71 @@
+/* ================================================================
+ * 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.tags;
+
+import javax.servlet.jsp.JspException;
+
+import de.laures.cewolf.DatasetProducer;
+import de.laures.cewolf.taglib.DataAware;
+
+/** 
+ * Tag <producer> which defines a DatasetProducer.
+ * @see DataTag
+ * @author  Guido Laures 
+ */
+public class ProducerTag extends AbstractParameterizedObjectTag {
+
+    private boolean useCache = true;
+
+    public int doEndTag() throws JspException {
+        DatasetProducer dataProducer = null;
+        try {
+            dataProducer = (DatasetProducer) getObject();
+            if (dataProducer == null) {
+                throw new JspException("Could not find datasetproducer under ID '" + getId() + "'");
+            }
+        } catch (ClassCastException cce) {
+            throw new JspException(
+                "Bean under ID '"
+                    + getId()
+                    + "' is of type '"
+                    + getObject().getClass().getName()
+                    + "'.\nType expected:"
+                    + DatasetProducer.class.getName());
+        }
+        DataAware dw = (DataAware) findAncestorWithClass(this, DataAware.class);
+        log.debug("setting data config on " + dw);
+        log.debug("useCache = " + useCache);
+        addParameter(DatasetProducer.PRODUCER_ATTRIBUTE_NAME, getId());
+        dw.setDataProductionConfig(dataProducer, getParameters(), useCache);
+        return doAfterEndTag(EVAL_BODY_INCLUDE);
+    }
+
+    /**
+     * Sets the useCache.
+     * @param useCache The useCache to set
+     */
+    public void setUsecache(boolean useCache) {
+        this.useCache = useCache;
+    }
+
+}