public abstract class Expression extends 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 |
|---|
Expression()
Deprecated.
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| Modifier and Type | Method and Description |
|---|---|
abstract Object |
evaluate(VariableResolver vResolver)
Deprecated.
Evaluates an expression that was previously prepared.
|
public abstract 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.Copyright © 2000-2021 Apache Software Foundation. All Rights Reserved.