Creational pattern

In software engineering, creational design patterns are design patterns that deal with object creation mechanisms, trying to create objects in a manner suitable to the situation. The basic form of object creation could result in design problems or added complexity to the design. Creational design patterns solve this problem by somehow controlling this object creation. Creational design patterns are further categorized into Object-creational patterns and Class-creational patterns. Where, Object-creational patterns deal with Object creation and Class-creational deal with Class-instantiation.

Some examples of creational design patterns include:

• Abstract factory pattern: centralize decision of what factory to instantiate
• Factory method pattern: centralize creation of an object of a specific type choosing one of several implementations
• Builder pattern: separate the construction of a complex object from its representation so that the same construction process can create different representations
• Lazy initialization pattern: tactic of delaying the creation of an object, the calculation of a value, or some other expensive process until the first time it is needed
• Object pool pattern: avoid expensive acquisition and release of resources by recycling objects that are no longer in use
• Prototype pattern: used when the type of objects to create is determined by a prototypical instance, which is cloned to produce new objects
• Singleton pattern: restrict instantiation of a class to one object

See also

• Behavioral pattern
• Structural pattern
• Concurrency pattern