Refactoring Thumbnails : Push Down Feature

Push Down Feature

a feature implementation specific to one particular class has settled high in the class hierarchy

push down the feature implementation to it's appropriate level of abstraction

Context:

The Push Down Feature thumbnail generalizes the refactorings where features are being pushed down the inheritance hierarchy. Push Down Feature is the natural thing to do when part of a subclass its implementation has settled to high in the class hierarchy. Example refactorings are : Push Down Method[Fowler] and Push Down Field[Fowler]. Many times this thumbnail proves useful for testing purposes as Push Down Dependency.