Factory Pattern

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Tutorial: Factory Pattern

One of the goals of object-oriented design is to delegate responsibility among different objects. This kind of partitioning is good since it encourages Encapsulation and Delegation.

Tutorial Details:

One of the goals of object-oriented design is to delegate responsibility among different objects. This kind of partitioning is good since it encourages Encapsulation and Delegation.

A class may need it's subclasses to specify the objects to be created or delegate responsibility to one of several helper subclasses so that knowledge can be localized to specific helper subclasses. Even Sometimes, an Application (or framework) at runtime, is not able to judge properly the class of an object that it must create. The Application (or framework) may know that it has to instantiate classes, but it may only know about abstract classes (or interfaces), which it cannot instantiate. Thus the Application class may only know when it has to instantiate a new Object of a class, not what kind of subclass to create.

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