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README Facade

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Dominik Liebler
2013-09-24 13:29:38 +02:00
parent 0224d6daa4
commit d618d2068a
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Facade/Facade.php
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namespace DesignPatterns\Facade;
/**
* The primary goal of a Facade Pattern is not to avoid you to read the manual of
* a complex API. It's only a side-effect.
*
* The first goal is to reduce coupling and follow the Law of Demeter.
*
* A Facade is meant to decouple a client and a sub-system by embedding
* many (but sometimes just one) interface, and of course to reduce complexity.
*
* 1. A facade does not forbid you the access to the sub-system
* 2. You can (you should) have multiple facades for one sub-system
*
* That's why a good facade has no "new" in it. If there are multiple creations
* for each method, it is not a Facade, it's a Builder or a
* [Abstract|Static|Simple] Factory [Method].
*
* The best facade has no new and a constructor with interface-type-hinted parameters.
* If you need creation of new instances, use Factory as argument.
*
*/
class Facade

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Facade/README.md Normal file
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# Facade
## Purpose
The primary goal of a Facade Pattern is not to avoid you to read the manual of a complex API. It's only a side-effect.
The first goal is to reduce coupling and follow the Law of Demeter.
A Facade is meant to decouple a client and a sub-system by embedding many (but sometimes just one) interface, and of course to reduce complexity.
* A facade does not forbid you the access to the sub-system
* You can (you should) have multiple facades for one sub-system
That's why a good facade has no `new` in it. If there are multiple creations for each method, it is not a Facade, it's a Builder or a
[Abstract|Static|Simple] Factory [Method].
The best facade has no `new` and a constructor with interface-type-hinted parameters.
If you need creation of new instances, use a Factory as argument.