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 not change.
Modifier and Type | Method | Description |
---|---|---|
Object |
resolveVariable |
Find a variable in the set of available variables. |
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.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
.
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https://docs.oracle.com/en/java/javase/21/docs/api/java.xml/javax/xml/xpath/XPathVariableResolver.html