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The interface for a prepared expression.
An instance of an Expression can be obtained via from an ExpressionEvaluator instance.
An Expression may or not have done a syntactic parse of the expression. A client invoking the evaluate() mehod should be ready for the case where ELParseException exceptions are raised.
Method Summary | |
java.lang.Object |
evaluate(VariableResolver vResolver)
Evaluates an expression that was previously prepared. |
Method Detail |
public java.lang.Object evaluate(VariableResolver vResolver) throws ELException
vResolver
- A VariableResolver instance that can be used at runtime to
resolve the name of implicit objects into Objects.
ELException
- Thrown if the expression evaluation failed.
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