Definitions for data access object

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Wiktionary

  1. data access object(Noun)

    an object in programming that provides an abstract interface to some type of persistence mechanism, providing some specific operations without exposing details of the persistence layer.

Freebase

  1. Data access object

    In computer software, a data access object is an object that provides an abstract interface to some type of database or other persistence mechanism. By mapping application calls to the persistence layer, DAOs provide some specific data operations without exposing details of the database. This isolation supports the Single responsibility principle. It separates what data accesses the application needs, in terms of domain-specific objects and data types, and how these needs can be satisfied with a specific DBMS, database schema, etc.. Although this design pattern is equally applicable to most programming languages, most types of software with persistence needs, and most types of databases, it is traditionally associated with Java EE applications and with relational databases accessed via the JDBC API because of its origin in Sun Microsystems' best practice guidelines for that platform.

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