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3 * or more contributor license agreements. See the NOTICE file
4 * distributed with this work for additional information
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6 * to you under the Apache License, Version 2.0 (the "License");
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8 * You may obtain a copy of the License at
10 * http://www.apache.org/licenses/LICENSE-2.0
12 * Unless required by applicable law or agreed to in writing, software
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19 * $Id: FuncNamespace.java 468655 2006-10-28 07:12:06Z minchau $
21 package org.apache.xpath.functions;
23 import org.apache.xml.dtm.DTM;
24 import org.apache.xpath.XPathContext;
25 import org.apache.xpath.objects.XObject;
26 import org.apache.xpath.objects.XString;
29 * Execute the Namespace() function.
32 public class FuncNamespace extends FunctionDef1Arg
34 static final long serialVersionUID = -4695674566722321237L;
37 * Execute the function. The function must return
39 * @param xctxt The current execution context.
40 * @return A valid XObject.
42 * @throws javax.xml.transform.TransformerException
44 public XObject execute(XPathContext xctxt) throws javax.xml.transform.TransformerException
47 int context = getArg0AsNode(xctxt);
50 if(context != DTM.NULL)
52 DTM dtm = xctxt.getDTM(context);
53 int t = dtm.getNodeType(context);
54 if(t == DTM.ELEMENT_NODE)
56 s = dtm.getNamespaceURI(context);
58 else if(t == DTM.ATTRIBUTE_NODE)
61 // This function always returns an empty string for namespace nodes.
62 // We check for those here. Fix inspired by Davanum Srinivas.
64 s = dtm.getNodeName(context);
65 if(s.startsWith("xmlns:") || s.equals("xmlns"))
66 return XString.EMPTYSTRING;
68 s = dtm.getNamespaceURI(context);
71 return XString.EMPTYSTRING;
74 return XString.EMPTYSTRING;
76 return ((null == s) ? XString.EMPTYSTRING : new XString(s));