FuncDoclocation.java revision 9f8118474e9513f7a5b7d2a05e4a0fb15d1a6569 
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 */
21package org.apache.xpath.functions;
22
23import org.apache.xml.dtm.DTM;
24import org.apache.xpath.XPathContext;
25import org.apache.xpath.objects.XObject;
26import 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 */
33public 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   */
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