Design Pattern
Design patterns can be broadly categorized into Creational, Structural, and Behavioral patterns. Each category serves a distinct purpose in software design, and understanding these categories helps developers select the most appropriate pattern based on the problem they are solving. Here's how the listed patterns can be categorized:
1. Creational Patterns
These patterns deal with object creation mechanisms, trying to create objects in a manner suitable to the situation. The goal is to create objects in a way that avoids specifying the exact class of object that will be created.
Builder Pattern Separates the construction of a complex object from its representation, allowing the same construction process to create different representations.
Factory Pattern Provides an interface for creating instances of a class, with its subclasses deciding which class to instantiate.
Provider Pattern Providing objects or services, often dynamically or based on configuration, which is a core aspect of creational design.
Singleton Pattern Ensures that a class has only one instance and provides a global point of access to it.
2. Structural Patterns
These patterns deal with object composition and help ensure that objects and classes are organized in a way that is easy to maintain and scale. The focus is on the relationships between objects and the composition of classes.
Adapter Pattern Converts one interface to another that a client expects, making incompatible interfaces compatible.
Facade Pattern Organizing the relationships between classes and subsystems by providing a unified interface that reduces complexity
Repository Pattern The repository acts as an intermediary between the domain and data mapping layers, providing a collection-like interface for accessing domain objects, typically using an underlying data source such as a database, web service, or in-memory store.
3. Behavioral Patterns
These patterns are concerned with algorithms and the assignment of responsibilities between objects. They focus on how objects interact and communicate, emphasizing the interaction between the components.
- Strategy Pattern Defines a family of algorithms and allows clients to choose the appropriate algorithm at runtime.