--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/flys-client/src/main/java/de/intevation/flys/client/server/DataFactory.java	Tue Jan 31 10:34:54 2012 +0000
@@ -0,0 +1,103 @@
+package de.intevation.flys.client.server;
+
+import javax.xml.xpath.XPathConstants;
+
+import org.w3c.dom.Element;
+import org.w3c.dom.NodeList;
+
+import org.apache.log4j.Logger;
+
+import de.intevation.artifacts.common.ArtifactNamespaceContext;
+import de.intevation.artifacts.common.utils.XMLUtils;
+
+import de.intevation.flys.client.shared.model.Data;
+import de.intevation.flys.client.shared.model.DataItem;
+import de.intevation.flys.client.shared.model.DefaultData;
+import de.intevation.flys.client.shared.model.DefaultDataItem;
+
+
+/**
+ * @author <a href="mailto:ingo.weinzierl@intevation.de">Ingo Weinzierl</a>
+ */
+public class DataFactory {
+
+    private static final Logger logger = Logger.getLogger(DataFactory.class);
+
+
+    public static final String NS_URI = ArtifactNamespaceContext.NAMESPACE_URI;
+
+
+    /**
+     * Creates a new Data instance based on the <i>art:type</i> attribute of
+     * <i>element</i>.
+     *
+     * @param element The Data element.
+     *
+     * @return a Data instance.
+     */
+    public static Data createDataFromElement(Element element) {
+        String name = element.getAttributeNS(NS_URI, "name");
+        String type = element.getAttributeNS(NS_URI, "type");
+
+        logger.debug("Create new Data instance for: " + name + " | " + type);
+
+        if (type == null || type.length() == 0) {
+            return createDefaultData(element, name);
+        }
+        else {
+            return createDefaultData(element, name);
+        }
+    }
+
+
+    /**
+     * This method creates a new instance of DefaultData which has no real type
+     * set.
+     *
+     * @param ele The Data element.
+     * @param name The name of the Data instance.
+     *
+     * @return an instance of DefaultData.
+     */
+    protected static Data createDefaultData(Element ele, String name) {
+        logger.debug("Create new DefaultData");
+        return new DefaultData(name, name, "default", extractDataItems(ele));
+    }
+
+
+    /**
+     * This method extracts the art:item elements placed under <i>elements</i>.
+     *
+     * @param element A data node that contains items.
+     *
+     * @return a list of DataItems.
+     */
+    protected static DataItem[] extractDataItems(Element element) {
+        NodeList itemList = (NodeList) XMLUtils.xpath(
+            element,
+            "art:item",
+            XPathConstants.NODESET,
+            ArtifactNamespaceContext.INSTANCE);
+
+        if (itemList == null || itemList.getLength() == 0) {
+            logger.debug("No old data items found.");
+            return null;
+        }
+
+        int count = itemList.getLength();
+
+        DataItem[] items = new DataItem[count];
+
+        for (int i = 0; i < count; i++) {
+            Element tmp = (Element) itemList.item(i);
+
+            String value = tmp.getAttributeNS(NS_URI, "value");
+            String label = tmp.getAttributeNS(NS_URI, "label");
+
+            items[i] = new DefaultDataItem(label, label, value);
+        }
+
+        return items;
+    }
+}
+// vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :