@Override
public ExtensionValueReturn execute() {
List<Element> resultQuery = (List<Element>) getParam(0);
Element e = resultQuery.get(0);
if (e instanceof Node) {
Node node = (Node) e;
Leaf fileNameLeaf = node.getLeaf("filename", 0);
if (fileNameLeaf != null) {
String value = fileNameLeaf.getValue();
int index = value.indexOf(".");
if (index > 0) {
return returnString(value.substring(0, index));
}
}
}
return returnString(null);
}