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      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    */
     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