Data access object: Difference between revisions

Revision as of 21:52, 29 July 2004

Revision as of 13:14, 6 December 2004

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Data Access Objects, or DAO, is a database [[Application programming interface|API]] used by Microsoft's Access database. While DAO tends to be faster than the [[ADO]] API, it is strongly tied to the Access database, unlike ADO.

== Context ==

Access to data varies depending on the source of the data. Access to persistent storage, such as to a database, varies greatly depending on the type of storage (relational databases, object-oriented databases, flat files, and so forth) and the vendor implementation.

== Solution ==

Use a Data Access Object (DAO) to abstract and encapsulate all access to the data source. The DAO manages the connection with the data source to obtain and store data.

The DAO implements the access mechanism required to work with the data source. The data source could be a persistent store like an RDBMS, an external service like a B2B exchange, a repository like an LDAP database, or a business service accessed via CORBA Internet Inter-ORB Protocol (IIOP) or low-level sockets

sources : java.sun.com

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