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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.
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
The abstract factory pattern in software engineering is a design pattern that provides a way to ... This is an example of the Abstract Factory (99) pattern. class ...
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
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)
Data abstraction is a design pattern in which data are visible only to semantically related functions, to prevent misuse. The success of data abstraction leads to frequent incorporation of data hiding as a design principle in object-oriented and pure functional programming.
The factory interface for creating or reusing flyweight objects is often a facade for a complex underlying system. For example, the factory interface is commonly implemented as a singleton to provide global access for creating flyweights. Generally speaking, the retrieval algorithm begins with a request for a new object via the factory interface.
Emilhdiaz 22:42, 12 October 2012 (UTC) The Java example of the Factory Method Pattern is a bit vague and can easily be confused for the Builder Pattern. I know this example is essentially a Builder that makes use of a Factory Method, but I think for individuals new to the subject and looking for information, this makes the learning experience ...