java-design-patterns/dao

layout, title, folder, permalink, categories, tags

layout	title	folder	permalink	categories	tags
pattern	Data Access Object	dao	/patterns/dao/	Architectural	Data access

Intent

Object provides an abstract interface to some type of database or other persistence mechanism.

Class diagram

Applicability

Use the Data Access Object in any of the following situations

• when you want to consolidate how the data layer is accessed
• when you want to avoid writing multiple data retrieval/persistence layers

Credits

• J2EE Design Patterns