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In object-oriented programming, the factory method pattern is a design pattern that uses factory methods to deal with the problem of creating objects without having to specify their exact classes. Rather than by calling a constructor , this is accomplished by invoking a factory method to create an object.
UML class diagram. 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]
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In class-based programming, a factory is an abstraction of a constructor of a class, while in prototype-based programming a factory is an abstraction of a prototype object. A constructor is concrete in that it creates objects as instances of one class, and by a specified process (class instantiation), while a factory can create objects by instantiating various classes, or by using other ...
Class diagrams are a sub-type of UML diagram. The so-called UML diagram shown in the article is a class diagram, as produced by IBM Rational Software. Although, it's supposed to be a UML tool, it does not produce standard UML, i.e. diagrams that conform to the standard. It would be better to rename the sections "UML Class Diagram" and "Rational ...
I would like to share the following UML diagram I have published on Design Patterns Open Online Learning. Your comments are welcomed! A sample UML class diagram for the Factory Method design pattern. In the above UML class diagram, the Creator class that requires a Product object doesn't instantiate the Product1 class directly.
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A design pattern is the re-usable form of a solution to a design problem. The idea was introduced by the architect Christopher Alexander [ 1 ] and has been adapted for various other disciplines, particularly software engineering .