open/closed principle

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(programming, theory)

open/closed principle - A principle used in OOPL which states that a class must be open and closed where open means it has the ability to be extended and closed means it cannot be modified other than by extension.

The idea is that once a class has been approved for use having gone through code reviews, unit tests, and other qualifying procedures, you don't want to change the class very much, just extend it. In practice the open/closed principle simply means making good use of abstraction and polymorphism.

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No references found			open-plan educational building open-plan office open-riser stair open-side planer open-side tool block open-space index open-space structure open-stope method open-string stair open-system architecture open-timber floor open-timbered open-timbered roof open-top agitating truck open-top mixer open-web girder open-web joist open-web steel joist open-well stair open-window unit open-wire carrier system open-wire circuit open-wire feeder open-wire loop open-wire transmission line open/closed principle OpenAir OpenAL Openbill OpenBSD OpenCourseWare opencut Opencut Field Opencut Mining OpenDDS OpenDoc OpenDoc parts OpenDocument OpenEdge Opener OpenFlow OpenGL OpenI18N OpenID Opening opening die opening door opening leaf opening light opening material opening of bids			Open-systems thermodynamics (biology) open-timber floor Open-timber roof open-timbered open-timbered roof Open-To-Buy open-top open-top agitating truck open-top mixer open-topped open-web girder open-web joist open-web joist open-web joist open-web joist open-web steel joist open-wedge osteotomy open-well stair open-window unit open-wire carrier system open-wire circuit open-wire feeder Open-Wire Line open-wire loop Open-Wire Radio Transmission System Open-Wire Transmission Line Open-Wire Transmission Line OPEN.SC open/closed principle OPEN: the Small Business Network openable openable openable openable openable Openaccess Universal Data Model OpenACS OpenAIR OpenAL OPENARCH Openbaar Centrum Voor Maatschappelijk Welzijn Openbaar Kunstbezit Vlaanderen Openbaar Ministerie Openbaar Onderwijs Zwolle Openbaar Primair Onderwijs Centrum Openbaar Primair Onderwijs Dordrecht Openbaar Primair Onderwijs in Haarlem Openbaar Primair Onderwijs Oegstgeest Openbaar Primair Onderwijs Zaanstad Openbaar Psychiatrisch Ziekenhuis Openbaar Psychiatrisch Zorgcentrum Openbaar Vervoer Openbaar Voortgezet Onderwijs Openbaar Zeister Lyceum Openbare Basisschool Openbare Bibliotheek Amsterdam Openbare Orde en Veiligheid

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