1. Factory Design Patterns
Farhad Safarov

2. Real World Examples:
• The Bank
• The Library

3. Advantages:
• creates objects without exposing the
instantiation logic to the client
$obj = new ClassA(new ClassB, new Class C);
• It is possible to use inheritance to easily edit
how the class is created and put in a different
set of classes

4. UML

5. PHP example:

6. Symfony2
• Services
• http://api.symfony.com/2.0/Symfony/Bundle/
SecurityBundle/DependencyInjection/Security
/Factory/SecurityFactoryInterface.html

7. Abstract Factory

8. The End
• Any questions?

9. References:
• http://www.oodesign.com/factory-pattern.html
• http://www.itec.uni-klu.ac.at/~harald/ds2001/rmi/factory/factory2.html
• http://en.wikipedia.org/wiki/Factory_method_pattern