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Creational patterns

Creational patterns manage object-creation mechanisms, making a system independent of how its objects are created, composed, and represented. They increase flexibility and facilitate code reuse: the system knows only the interfaces of the objects it works with, not their concrete classes. These patterns become especially important as a system evolves and relies more on object composition than on class inheritance.

There are two types of Creational patterns:

1. Class-level patterns
2. Object-level patterns

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Class-level patterns delegate object creation to subclasses through inheritance.

Only “Factory Method” belongs to class-level patterns.

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Object-level patterns delegate object creation to other objects, keeping the system independent of concrete classes.

• Abstract Factory creates families of related or dependent objects.
• Builder separates the construction of a complex object from its representation.
• Prototype creates new objects by cloning pre-configured ones.
• Singleton restricts a class to a single instance and provides a global access point to it.

List of Creational patterns

• Abstract Factory
• Builder
• Factory method
• Prototype
• Singleton

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