1 /*
2  * Licensed to the Apache Software Foundation (ASF) under one
3  * or more contributor license agreements. See the NOTICE file
4  * distributed with this work for additional information
5  * regarding copyright ownership. The ASF licenses this file
6  * to you under the Apache License, Version 2.0 (the  "License");
7  * you may not use this file except in compliance with the License.
8  * You may obtain a copy of the License at
9  *
10  *     http://www.apache.org/licenses/LICENSE-2.0
11  *
12  * Unless required by applicable law or agreed to in writing, software
13  * distributed under the License is distributed on an "AS IS" BASIS,
14  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
15  * See the License for the specific language governing permissions and
16  * limitations under the License.
17  */
18 /*
19  * $Id: FuncDoclocation.java 468655 2006-10-28 07:12:06Z minchau $
20  */
21 package org.apache.xpath.functions;
22 
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;
27 
28 /**
29  * Execute the proprietary document-location() function, which returns
30  * a node set of documents.
31  * @xsl.usage advanced
32  */
33 public class FuncDoclocation extends FunctionDef1Arg
34 {
35     static final long serialVersionUID = 7469213946343568769L;
36 
37   /**
38    * Execute the function.  The function must return
39    * a valid object.
40    * @param xctxt The current execution context.
41    * @return A valid XObject.
42    *
43    * @throws javax.xml.transform.TransformerException
44    */
execute(XPathContext xctxt)45   public XObject execute(XPathContext xctxt) throws javax.xml.transform.TransformerException
46   {
47 
48     int whereNode = getArg0AsNode(xctxt);
49     String fileLocation = null;
50 
51     if (DTM.NULL != whereNode)
52     {
53       DTM dtm = xctxt.getDTM(whereNode);
54 
55       // %REVIEW%
56       if (DTM.DOCUMENT_FRAGMENT_NODE ==  dtm.getNodeType(whereNode))
57       {
58         whereNode = dtm.getFirstChild(whereNode);
59       }
60 
61       if (DTM.NULL != whereNode)
62       {
63         fileLocation = dtm.getDocumentBaseURI();
64 //        int owner = dtm.getDocument();
65 //        fileLocation = xctxt.getSourceTreeManager().findURIFromDoc(owner);
66       }
67     }
68 
69     return new XString((null != fileLocation) ? fileLocation : "");
70   }
71 }
72