javax.xml.xpath.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.
Public Methods | |||||||||||
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Find a variable in the set of available variables. |
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.
|
---|
null
if no variable named
variableName
exists. The value returned must be of a type appropriate for the underlying object model.
NullPointerException |
If
variableName
is
null
.
|
---|