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public interface Expression
Represents a single JEXL expression. This simple interface provides access to the underlying expression through getExpression(), and it provides hooks to add a pre- and post- expression resolver.
An expression is different than a script - it is simply a reference of an expression.
Method Summary | |
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void |
addPostResolver(JexlExprResolver resolver)
Allows addition of a resolver to allow custom interdiction of expression evaluation. |
void |
addPreResolver(JexlExprResolver resolver)
Allows addition of a resolver to allow custom interdiction of expression evaluation. |
java.lang.Object |
evaluate(JexlContext context)
Evaluates the expression with the variables contained in the supplied JexlContext . |
java.lang.String |
getExpression()
Returns the JEXL expression this Expression was created with. |
Method Detail |
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java.lang.Object evaluate(JexlContext context) throws java.lang.Exception
JexlContext
.
context
- A JexlContext containing variables.
java.lang.Exception
- on any errorjava.lang.String getExpression()
void addPreResolver(JexlExprResolver resolver)
resolver
- resolver to be called before Jexl expression evaluatedvoid addPostResolver(JexlExprResolver resolver)
resolver
- resolver to be called if Jexl expression
evaluated to null.
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