javax.xml.xpath
Interface XPathVariableResolver
public interface XPathVariableResolver
XPathVariableResolver
provides access to the set of user defined XPath variables.
The
XPathVariableResolver
and the XPath evaluator must adhere to a contract that
cannot be directly enforced by the API. Although variables may be mutable,
that is, an application may wish to evaluate the same XPath expression more
than once with different variable values, in the course of evaluating any
single XPath expression, a variable's value
must be immutable.
$Revision: 226183 $, $Date: 2005-04-08 12:39:14 +0200 (Fri, 08 Apr 2005) $
resolveVariable
public Object resolveVariable(QName variableName)
Find a variable in the set of available variables.
If
variableName
is
null
, then a
NullPointerException
is thrown.
variableName
- The QName
of the variable name.
- The variables value, or
null
if no variable named variableName
exists. The value returned must be of a type appropriate for the underlying object model.