public abstract class Expression extends java.lang.Object
The abstract class 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() method should be ready for the case where ELParseException exceptions are raised.
|Constructor and Description|
|Modifier and Type||Method and Description|
Evaluates an expression that was previously prepared.
public abstract 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.