code: /*
   * Licensed to the Apache Software Foundation (ASF) under one
   * or more contributor license agreements. See the NOTICE file
   * distributed with this work for additional information
   * regarding copyright ownership. The ASF licenses this file
   * to you under the Apache License, Version 2.0 (the  "License");
   * you may not use this file except in compliance with the License.
   * You may obtain a copy of the License at
   *
   *     http://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   */
  /*
   * $Id$
   */
  package org.apache.xalan.templates;
  
  import org.apache.xpath.Expression;
  import org.apache.xpath.XPathContext;
  import org.apache.xpath.objects.XObject;
  
  
  /**
   * This is the same as XUnresolvedVariable, but it assumes that the 
   * context is already set up.  For use with psuedo variables.
   * Also, it holds an Expression object, instead of an ElemVariable.
   * It must only hold static context, since a single copy will be 
   * held in the template.
   */
  public class XUnresolvedVariableSimple extends XObject
  {
      static final long serialVersionUID = -1224413807443958985L;
    public XUnresolvedVariableSimple(ElemVariable obj)
    {
      super(obj);
    }
      
  	
    /**
     * For support of literal objects in xpaths.
     *
     * @param xctxt The XPath execution context.
     *
     * @return This object.
     *
     * @throws javax.xml.transform.TransformerException
     */
    public XObject execute(XPathContext xctxt) throws javax.xml.transform.TransformerException
    {
    	Expression expr = ((ElemVariable)m_obj).getSelect().getExpression();
      XObject xobj = expr.execute(xctxt);
      xobj.allowDetachToRelease(false);
      return xobj;
    }
    
    /**
     * Tell what kind of class this is.
     *
     * @return CLASS_UNRESOLVEDVARIABLE
     */
    public int getType()
    {
      return CLASS_UNRESOLVEDVARIABLE;
    }
    
    /**
     * Given a request type, return the equivalent string.
     * For diagnostic purposes.
     *
     * @return An informational string.
     */
    public String getTypeString()
    {
      return "XUnresolvedVariableSimple (" + object().getClass().getName() + ")";
    }
  
  
  }
  
  