Sunday, March 27, 2022

SKP's GoF Design Patterns a Day - 04 - Abstract Factory

[GitHub Repository for Code Samples]

Was going through the book ‘Head First Design Patterns’, came up with my own examples to understand them further. Try downloading the code and see if it helps you in comprehending these in a better way.

3. Abstract Factory [Sample Code]
AbstractFactory defines a template or interface for creation of similar types of objects or implementations. Usually, AbstractFactory will encapsulate a factory method or more within for actual creation of the product.
Fig. 6 : Abstract Factory (CreationalDesign Pattern - Class and Sequence Diagram 
[Source : Wikipedia]


Taking the same example as above, MobileStoreFactory instantiates the concrete instance of the abstract factory (MobileStore) based upon the variable specified, either "Nokia" (NokiaStore) or "Sony"(SonyStore). The factory is then responsible for creating the objects of similar types based upon the choice - such as "ASeries" or "BSeries" or "CSeries". The mobile is then assembled based upon this by the MobileStore. You may use MobileStoreCentre to run this example and understand the design pattern based on the output.

[GitHub Repository for Code Samples]

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