package org.apache.xalan.templates;
import javax.xml.transform.TransformerException;
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
{
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() + ")";
}
}