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.
- Since:
- 1.5
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Method Summary
Modifier and TypeMethodDescriptionresolveVariable(QName variableName) Find a variable in the set of available variables.
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Method Details
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resolveVariable
Find a variable in the set of available variables.
If
variableNameisnull, then aNullPointerExceptionis thrown.- Parameters:
variableName- TheQNameof the variable name.- Returns:
- The variables value, or
nullif no variable namedvariableNameexists. The value returned must be of a type appropriate for the underlying object model. - Throws:
NullPointerException- IfvariableNameisnull.
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