f597fc1b07
* Fix languages * Missed change for version number * Add language field for presentation * Revert change in README for double buffer Co-authored-by: Jackie Nim <=>
27 lines
724 B
Markdown
27 lines
724 B
Markdown
---
|
|
layout: pattern
|
|
title: Data Mapper
|
|
folder: data-mapper
|
|
permalink: /patterns/data-mapper/
|
|
categories: Architectural
|
|
language: en
|
|
tags:
|
|
- Decoupling
|
|
---
|
|
|
|
## Intent
|
|
A layer of mappers that moves data between objects and a database while keeping them independent of each other and the mapper itself
|
|
|
|
## Class diagram
|
|
|
|
|
|
## Applicability
|
|
Use the Data Mapper in any of the following situations
|
|
|
|
* when you want to decouple data objects from DB access layer
|
|
* when you want to write multiple data retrieval/persistence implementations
|
|
|
|
## Credits
|
|
|
|
* [Data Mapper](http://richard.jp.leguen.ca/tutoring/soen343-f2010/tutorials/implementing-data-mapper/)
|