package net.sf.saxon.functions;
import net.sf.saxon.expr.XPathContext;
import net.sf.saxon.om.FunctionItem;
import net.sf.saxon.om.Item;
import net.sf.saxon.om.StructuredQName;
import net.sf.saxon.trans.XPathException;
import net.sf.saxon.type.BuiltInAtomicType;
import net.sf.saxon.value.QNameValue;
/**
* This class implements the function function-name(), which is a standard function in XQuery 1.1
*/
public class FunctionName extends SystemFunction {
/**
* Evaluate this function call at run-time
* @param context The XPath dynamic evaluation context
* @return the result of the function, or null to represent an empty sequence
* @throws net.sf.saxon.trans.XPathException
* if a dynamic error occurs during evaluation of the function.
*/
public Item evaluateItem(XPathContext context) throws XPathException {
FunctionItem f = (FunctionItem)getArguments()[0].evaluateItem(context);
StructuredQName name = f.getFunctionName();
if (name == null) {
return null;
} else {
return new QNameValue(name, BuiltInAtomicType.QNAME);
}
}
}
//
// The contents of this file are subject to the Mozilla Public License Version 1.0 (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.mozilla.org/MPL/
//
// Software distributed under the License is distributed on an "AS IS" basis,
// WITHOUT WARRANTY OF ANY KIND, either express or implied.
// See the License for the specific language governing rights and limitations under the License.
//
// The Original Code is: all this file.
//
// The Initial Developer of the Original Code is Michael H. Kay.
//
// Portions created by (your name) are Copyright (C) (your legal entity). All Rights Reserved.
//
// Contributor(s): none.
//