org.sca4j.host.expression
Interface ExpressionEvaluator

public interface ExpressionEvaluator

Evalautes an expression against some information set. For example, an implementation may return the value of a system property. One application of an ExpressionEvaluators is to provide a mechanism to override attrbiutes and values in a composite.

Version:

$Revision$ $Date$

Method Summary

java.lang.String

evaluate(java.lang.String expression) Evaluate an expression, returning the corresponding value or null.

Method Detail

evaluate

java.lang.String evaluate(java.lang.String expression)

Evaluate an expression, returning the corresponding value or null.

Parameters:

expression - the expression to evaluate

Returns:

the evaluated expression or null