Data transfer object
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Data transfer object (DTO), formerly known as value objects[citation needed] or VO, is a design pattern used to transfer data between software application subsystems. DTOs are often used in conjunction with data access objects to retrieve data from a database.
The difference between data transfer objects and business objects or data access objects is that a DTO does not have any behaviour except for storage and retrieval of its own data (accessors and mutators).
In a traditional EJB architecture, DTOs serve dual purposes: first, they work around the problem that entity beans are not serializable; second, they implicitly define an assembly phase where all data to be used by the view is fetched and marshalled into the DTOs before returning control to the presentation tier.
[edit] See also
[edit] External links
- Core J2EE Patterns - Transfer Object
- Core J2EE Patterns - Data Access Object
- Abuses of DTO pattern in Java World
- Data Transfer Object - Microsoft MSDN Library
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