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A Rip Off Of Ant - A drag and drop component framework.
/*
* (c) Rob Gordon 2006
*/
package org.oddjob.arooa.runtime;
/**
* Allow different behaviour during substitution. Intended to allow
* different handling of null values.
*/
public interface SubstitutionPolicy {
/**
* Provide a modified {@link Evaluator}.
*
* @param existingEvaluator An existing evaluator.
*
* @return The modified evaluator.
*/
public Evaluator modify(Evaluator existingEvaluator);
}