org.apache.xpath.functions.FuncNamespace Maven / Gradle / Ivy
/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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.
*/
/*
* $Id: FuncNamespace.java 468655 2006-10-28 07:12:06Z minchau $
*/
package org.apache.xpath.functions;
import org.apache.xml.dtm.DTM;
import org.apache.xpath.XPathContext;
import org.apache.xpath.objects.XObject;
import org.apache.xpath.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));
}
}