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Java > Open Source Codes > org > apache > xpath > functions > FuncDoclocation


1 /*
2  * Copyright 1999-2004 The Apache Software Foundation.
3  *
4  * Licensed under the Apache License, Version 2.0 (the "License");
5  * you may not use this file except in compliance with the License.
6  * You may obtain a copy of the License at
7  *
8  * http://www.apache.org/licenses/LICENSE-2.0
9  *
10  * Unless required by applicable law or agreed to in writing, software
11  * distributed under the License is distributed on an "AS IS" BASIS,
12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13  * See the License for the specific language governing permissions and
14  * limitations under the License.
15  */
16 /*
17  * $Id: FuncDoclocation.java,v 1.8 2004/02/17 04:34:01 minchau Exp $
18  */
19 package org.apache.xpath.functions;
20
21 import org.apache.xml.dtm.DTM;
22 import org.apache.xpath.XPathContext;
23 import org.apache.xpath.objects.XObject;
24 import org.apache.xpath.objects.XString;
25
26 /**
27  * Execute the proprietary document-location() function, which returns
28  * a node set of documents.
29  * @xsl.usage advanced
30  */
31 public class FuncDoclocation extends FunctionDef1Arg
32 {
33
34   /**
35    * Execute the function. The function must return
36    * a valid object.
37    * @param xctxt The current execution context.
38    * @return A valid XObject.
39    *
40    * @throws javax.xml.transform.TransformerException
41    */
42   public XObject execute(XPathContext xctxt) throws javax.xml.transform.TransformerException JavaDoc
43   {
44
45     int whereNode = getArg0AsNode(xctxt);
46     String JavaDoc fileLocation = null;
47
48     if (DTM.NULL != whereNode)
49     {
50       DTM dtm = xctxt.getDTM(whereNode);
51       
52       // %REVIEW%
53 if (DTM.DOCUMENT_FRAGMENT_NODE == dtm.getNodeType(whereNode))
54       {
55         whereNode = dtm.getFirstChild(whereNode);
56       }
57
58       if (DTM.NULL != whereNode)
59       {
60         fileLocation = dtm.getDocumentBaseURI();
61 // int owner = dtm.getDocument();
62 // fileLocation = xctxt.getSourceTreeManager().findURIFromDoc(owner);
63 }
64     }
65
66     return new XString((null != fileLocation) ? fileLocation : "");
67   }
68 }
69
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