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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
Methods Modifier and Type Method and Description Object
resolveVariable(QName variableName)
Find a variable in the set of available variables.
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Method Detail
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resolveVariable
Object resolveVariable(QName variableName)
Find a variable in the set of available variables.
If
variableName
isnull
, then aNullPointerException
is thrown.- Parameters:
variableName
- TheQName
of the variable name.- Returns:
- The variables value, or
null
if no variable namedvariableName
exists. The value returned must be of a type appropriate for the underlying object model. - Throws:
NullPointerException
- IfvariableName
isnull
.
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