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: XUnresolvedVariableSimple.java 468643 2006-10-28 06:56:03Z minchau $
20  */
21 package org.apache.xalan.templates;
22 
23 import org.apache.xpath.Expression;
24 import org.apache.xpath.XPathContext;
25 import org.apache.xpath.objects.XObject;
26 
27 
28 /**
29  * This is the same as XUnresolvedVariable, but it assumes that the
30  * context is already set up.  For use with psuedo variables.
31  * Also, it holds an Expression object, instead of an ElemVariable.
32  * It must only hold static context, since a single copy will be
33  * held in the template.
34  */
35 public class XUnresolvedVariableSimple extends XObject
36 {
37     static final long serialVersionUID = -1224413807443958985L;
XUnresolvedVariableSimple(ElemVariable obj)38   public XUnresolvedVariableSimple(ElemVariable obj)
39   {
40     super(obj);
41   }
42 
43 
44   /**
45    * For support of literal objects in xpaths.
46    *
47    * @param xctxt The XPath execution context.
48    *
49    * @return This object.
50    *
51    * @throws javax.xml.transform.TransformerException
52    */
execute(XPathContext xctxt)53   public XObject execute(XPathContext xctxt) throws javax.xml.transform.TransformerException
54   {
55   	Expression expr = ((ElemVariable)m_obj).getSelect().getExpression();
56     XObject xobj = expr.execute(xctxt);
57     xobj.allowDetachToRelease(false);
58     return xobj;
59   }
60 
61   /**
62    * Tell what kind of class this is.
63    *
64    * @return CLASS_UNRESOLVEDVARIABLE
65    */
getType()66   public int getType()
67   {
68     return CLASS_UNRESOLVEDVARIABLE;
69   }
70 
71   /**
72    * Given a request type, return the equivalent string.
73    * For diagnostic purposes.
74    *
75    * @return An informational string.
76    */
getTypeString()77   public String getTypeString()
78   {
79     return "XUnresolvedVariableSimple (" + object().getClass().getName() + ")";
80   }
81 
82 
83 }
84 
85