Data access object: Difference between revisions

Revision as of 20:39, 5 May 2005

Revision as of 06:07, 20 May 2005

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In [[computer]] [[software]], a '''Data Access Object''' (DAO) is a [[software component|component]] which provides a common [[Interface (computer science)|interface]] between the [[Application software|application]] and one or more [[data storage device]]s, such as a [[database]] or [[Computer file|file]]. The term is most frequently applied to the Data Access Object [[Design pattern (computer science)|design pattern]].

'''Data Access Objects''' was also used by [[Microsoft]] (typically abbreviated to DAO), as the name of a library they created based on this pattern.

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The advantage of using data access objects is that any [[Business object (computer science)|business object]] (which contains application or operation specific details) does not require direct knowledge of the final destination for the information is manipulates. As a result, if it is neccessary to change where or how that data is stored that modification can be made without needing to change the main application.

== LinksExternal links ==

* [http://java.sun.com/blueprints/corej2eepatterns/Patterns/DataAccessObject.html Sun'sCore definitionJ2EE ofPatterns the- Data Access Object pattern]

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[[Category:Software design patterns]]