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Abstract factory pattern
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=== Variants === The original structure of the abstract factory pattern, as defined in 1994 in ''[[Design Patterns]]'', is based on abstract classes for the abstract factory and the abstract products to be created. The concrete factories and products are classes that specialize the abstract classes using inheritance.<ref name=":0" /> A more recent structure of the pattern is based on interfaces that define the abstract factory and the abstract products to be created. This design uses native support for interfaces or protocols in mainstream programming languages to avoid inheritance. In this case, the concrete factories and products are classes that realize the interface by implementing it.<ref name="abstract factory" />
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