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A poltergeist can often be identified by its name; they are often called "manager_", "controller_", "start_process", etc.
Sometimes, poltergeist classes are created because the programmer anticipated the need for a more complex architecture (e.g. the [[Command pattern]]). This more complex architecture may actually never materialize.
Poltergeists should not be confused with long-lived, state-bearing objects of a [[pattern]] such as [[Model-view-controller]], or tier-separating patterns such as [[Business-Delegate]].
To remove a poltergeist, delete the class and insert its functionality in the invoked class, possibly by [[Inheritance (computer science)|inheritance]] or as a [[mixin]].
==See also==
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