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/*
* $Id: FuncNamespace.java,v 1.8 2010-11-01 04:35:08 joehw Exp $
*/
package com.sun.org.apache.xpath.internal.functions;
import com.sun.org.apache.xml.internal.dtm.DTM;
import com.sun.org.apache.xpath.internal.XPathContext;
import com.sun.org.apache.xpath.internal.objects.XObject;
import com.sun.org.apache.xpath.internal.objects.XString;
/**
* Execute the Namespace() function.
* @xsl.usage advanced
*/
public class FuncNamespace extends FunctionDef1Arg
{
static final long serialVersionUID = -4695674566722321237L;
/**
* Execute the function. The function must return
* a valid object.
* @param xctxt The current execution context.
* @return A valid XObject.
*
* @throws javax.xml.transform.TransformerException
*/
public XObject execute(XPathContext xctxt) throws javax.xml.transform.TransformerException
{
int context = getArg0AsNode(xctxt);
String s;
if(context != DTM.NULL)
{
DTM dtm = xctxt.getDTM(context);
int t = dtm.getNodeType(context);
if(t == DTM.ELEMENT_NODE)
{
s = dtm.getNamespaceURI(context);
}
else if(t == DTM.ATTRIBUTE_NODE)
{
// This function always returns an empty string for namespace nodes.
// We check for those here. Fix inspired by Davanum Srinivas.
s = dtm.getNodeName(context);
if(s.startsWith("xmlns:") || s.equals("xmlns"))
return XString.EMPTYSTRING;
s = dtm.getNamespaceURI(context);
}
else
return XString.EMPTYSTRING;
}
else
return XString.EMPTYSTRING;
return ((null == s) ? XString.EMPTYSTRING : new XString(s));
}
}