1 files changed, 78 insertions, 0 deletions
diff --git a/spss/server/serverlib/src/main/java/at/gv/egovernment/moa/spss/server/invoke/InvokerUtils.java b/spss/server/serverlib/src/main/java/at/gv/egovernment/moa/spss/server/invoke/InvokerUtils.java
new file mode 100644
index 000000000..a8447b835
--- /dev/null
+++ b/spss/server/serverlib/src/main/java/at/gv/egovernment/moa/spss/server/invoke/InvokerUtils.java
@@ -0,0 +1,78 @@
+/*
+* Copyright 2003 Federal Chancellery Austria
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     http://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*/
+package at.gv.egovernment.moa.spss.server.invoke;
+
+import org.w3c.dom.Element;
+import org.w3c.dom.Node;
+import org.w3c.dom.NodeList;
+
+import at.gv.egovernment.moa.util.XPathException;
+import at.gv.egovernment.moa.util.XPathUtils;
+
+import at.gv.egovernment.moa.spss.MOAApplicationException;
+import at.gv.egovernment.moa.spss.api.common.ElementSelector;
+
+/**
+ * Utility methods for invoking the IAIK MOA modules.
+ * 
+ * @author Patrick Peck
+ * @version $Id$
+ */
+public class InvokerUtils {
+
+  /**
+   * Select the signature parent element.
+   * 
+   * @param root The root DOM element which contains the signature parent
+   * element somewhere in its subtree.
+   * @param location The <code>ElementSelector</code> containing the XPath 
+   * expression to select the signature parent element from the document. 
+   * It is also contains the namespace prefix to URI mapping.
+   * @return Element The signature parent element.
+   * @throws MOAApplicationException An error occurred evaluating the
+   * <code>location</code>.
+   */
+  public static Element evaluateSignatureLocation(
+    Element root,
+    ElementSelector location)
+    throws MOAApplicationException {
+
+    NodeList nodes;
+
+    try {
+      nodes =
+        XPathUtils.selectNodeList(
+          root,
+          location.getNamespaceDeclarations(),
+          location.getXPathExpression());
+    } catch (XPathException e) {
+      throw new MOAApplicationException(
+        "2212",
+        new Object[] { location.getXPathExpression()},
+        e);
+    }
+
+    if (nodes.getLength() != 1
+      || !(nodes.item(0).getNodeType() == Node.ELEMENT_NODE)) {
+      throw new MOAApplicationException(
+        "2212",
+        new Object[] { location.getXPathExpression()});
+    }
+    return (Element) nodes.item(0);
+  }
+
+
+}