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: ProcessorExsltFuncResult.java 468640 2006-10-28 06:53:53Z minchau $
20  */
21 package org.apache.xalan.processor;
22 
23 import org.apache.xalan.templates.ElemExsltFuncResult;
24 import org.apache.xalan.templates.ElemExsltFunction;
25 import org.apache.xalan.templates.ElemParam;
26 import org.apache.xalan.templates.ElemTemplateElement;
27 import org.apache.xalan.templates.ElemVariable;
28 
29 import org.xml.sax.Attributes;
30 import org.xml.sax.SAXException;
31 
32 /**
33  * This class processes parse events for an exslt func:result element.
34  * @xsl.usage internal
35  */
36 public class ProcessorExsltFuncResult extends ProcessorTemplateElem
37 {
38     static final long serialVersionUID = 6451230911473482423L;
39 
40   /**
41    * Verify that the func:result element does not appear within a variable,
42    * parameter, or another func:result, and that it belongs to a func:function
43    * element.
44    */
startElement( StylesheetHandler handler, String uri, String localName, String rawName, Attributes attributes)45   public void startElement(
46           StylesheetHandler handler, String uri, String localName, String rawName, Attributes attributes)
47             throws SAXException
48   {
49     String msg = "";
50 
51     super.startElement(handler, uri, localName, rawName, attributes);
52     ElemTemplateElement ancestor = handler.getElemTemplateElement().getParentElem();
53     while (ancestor != null && !(ancestor instanceof ElemExsltFunction))
54     {
55       if (ancestor instanceof ElemVariable
56           || ancestor instanceof ElemParam
57           || ancestor instanceof ElemExsltFuncResult)
58       {
59         msg = "func:result cannot appear within a variable, parameter, or another func:result.";
60         handler.error(msg, new SAXException(msg));
61       }
62       ancestor = ancestor.getParentElem();
63     }
64     if (ancestor == null)
65     {
66       msg = "func:result must appear in a func:function element";
67       handler.error(msg, new SAXException(msg));
68     }
69   }
70 }
71