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The abstract factory pattern in software engineering is a design pattern that provides a way to create families of related objects without imposing their concrete classes, by encapsulating a group of individual factories that have a common theme without specifying their concrete classes. [1]
Design pattern, overview of design patterns in general; Abstract factory pattern, a pattern often implemented using factory methods; Builder pattern, another creational pattern; Template method pattern, which may call factory methods; Joshua Bloch's idea of a static factory method for which Bloch claims there is no direct equivalent in Design ...
For example, several GoF patterns, like the Factory method pattern, the Builder or even the Singleton are implementations of this concept. The Abstract factory pattern instead is a method to build collections of factories. In some design patterns, a factory object has a method for every kind of object it can create
Some examples of creational design patterns include: Abstract Factory pattern : a class requests the objects it requires from a factory object instead of creating the objects directly Factory method pattern : centralize creation of an object of a specific type choosing one of several implementations
Efforts have also been made to codify design patterns in particular domains, including the use of existing design patterns as well as domain-specific design patterns. Examples include user interface design patterns, [ 7 ] information visualization , [ 8 ] secure design, [ 9 ] "secure usability", [ 10 ] Web design [ 11 ] and business model design.
Design Patterns: Elements of Reusable Object-Oriented Software (1994) is a software engineering book describing software design patterns. The book was written by Erich Gamma , Richard Helm , Ralph Johnson , and John Vlissides , with a foreword by Grady Booch .
The Java example was added in 12 September 2006 , and the author said that he simply adapted the C# example . The C# example was added in 31 May 2003 by Benno. His only other contribution is a "Hello World!" example in another article. He gives no clue on the origin of the code or on his identity.
In a software design pattern view, lazy initialization is often used together with a factory method pattern. This combines three ideas: Using a factory method to create instances of a class (factory method pattern) Storing the instances in a map, and returning the same instance to each request for an instance with same parameters (multiton pattern)