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javax.servlet.jsp.el
Deprecated. As of JSP 2.1, replaced by
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Expression (Java EE 5 SDK) - Java Platform, Enterprise Edition v5.0 API Specifications
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javax.servlet.jsp.el
Class Expression
java.lang.Objectjavax.servlet.jsp.el.Expression
Deprecated. As of JSP 2.1, replaced by
ValueExpression
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.
- Since:
- JSP 2.0
| Constructor Summary | |
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Expression()
Deprecated. |
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| Method Summary | |
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abstract Object |
evaluate(VariableResolver vResolver)
Deprecated. Evaluates an expression that was previously prepared. |
| Methods inherited from class java.lang.Object |
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clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
| Constructor Detail |
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Expression
public Expression()
- Deprecated.
| Method Detail |
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evaluate
public abstract Object evaluate(VariableResolver vResolver) throws ELException
- Deprecated.
- Evaluates an expression that was previously prepared. In some implementations preparing an expression involves full syntactic validation, but others may not do so. Evaluating the expression may raise an ELParseException as well as other ELExceptions due to run-time evaluation.
- Parameters:
vResolver- A VariableResolver instance that can be used at runtime to resolve the name of implicit objects into Objects.- Returns:
- The result of the expression evaluation.
- Throws:
ELException- Thrown if the expression evaluation failed.
- Evaluates an expression that was previously prepared. In some implementations preparing an expression involves full syntactic validation, but others may not do so. Evaluating the expression may raise an ELParseException as well as other ELExceptions due to run-time evaluation.
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