# HG changeset patch
# User Ingo Weinzierl <ingo.weinzierl@intevation.de>
# Date 1275568535 0
# Node ID 9d530f9137298259954c26ad97448fc3dac43d13
# Parent  d387a97807a36cacd63ff32d22a3b8a42c0999a0
Added a helper class to handle xml related stuff.

geo-backend/trunk@1148 c6561f87-3c4e-4783-a992-168aeb5c3f6f

diff -r d387a97807a3 -r 9d530f913729 geo-backend/ChangeLog
--- a/geo-backend/ChangeLog	Mon May 31 07:23:21 2010 +0000
+++ b/geo-backend/ChangeLog	Thu Jun 03 12:35:35 2010 +0000
@@ -1,3 +1,8 @@
+2010-06-03  Ingo Weinzierl <ingo.weinzierl@intevation.de>
+
+	* src/main/java/de/intevation/gnv/geobackend/util/XMLUtils.java: Some
+	  functions to handle xml stuff.
+
 2010-05-31  Ingo Weinzierl <ingo.weinzierl@intevation.de>
 
 	* src/main/java/de/intevation/gnv/geobackend/base/query/DefaultQueryExceutor.java:
diff -r d387a97807a3 -r 9d530f913729 geo-backend/src/main/java/de/intevation/gnv/geobackend/util/XMLUtils.java
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/geo-backend/src/main/java/de/intevation/gnv/geobackend/util/XMLUtils.java	Thu Jun 03 12:35:35 2010 +0000
@@ -0,0 +1,61 @@
+package de.intevation.gnv.geobackend.util;
+
+import javax.xml.namespace.NamespaceContext;
+import javax.xml.namespace.QName;
+
+import javax.xml.xpath.XPath;
+import javax.xml.xpath.XPathExpressionException;
+import javax.xml.xpath.XPathFactory;
+
+import org.apache.log4j.Logger;
+
+
+/**
+ * @author <a href="mailto:ingo.weinzierl@intevation.de">Ingo Weinzierl</a>
+ */
+public final class XMLUtils {
+
+    private static Logger logger = Logger.getLogger(XMLUtils.class);
+
+
+    private XMLUtils() {
+    }
+
+
+    public static Object xpath(
+        Object           root,
+        String           query,
+        QName            returnType,
+        NamespaceContext namespaceContext
+    ) {
+        if (root == null) {
+            return null;
+        }
+
+        try {
+            XPath xpath = newXPath(namespaceContext);
+
+            if (xpath != null) {
+                return xpath.evaluate(query, root, returnType);
+            }
+        }
+        catch (XPathExpressionException xpee) {
+            logger.error(xpee.getLocalizedMessage(), xpee);
+        }
+
+        return null;
+    }
+
+
+    public static XPath newXPath(NamespaceContext namespaceContext) {
+        XPathFactory factory = XPathFactory.newInstance();
+        XPath         xpath  = factory.newXPath();
+
+        if (namespaceContext != null) {
+            xpath.setNamespaceContext(namespaceContext);
+        }
+
+        return xpath;
+    }
+}
+// vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :