Structural GOF

The Proxy Design Pattern is a structural pattern that provides a surrogate or placeholder for another object. It allows you to control access to the real object, providing additional functionality such as access control, lazy initialization, or logging. The proxy pattern involves creating a proxy class that implements the same interface as the real object and delegates requests to the real object. Components of the Proxy Design Pattern: Subject: An interface or abstract class that defines the common interface for both the RealSubject and the Proxy....

The Flyweight Design Pattern is a structural pattern that optimizes memory usage by sharing common parts of objects to support a large number of similar objects efficiently. This pattern is used when you have a large number of objects with shared states and you want to minimize memory usage. Components of the Flyweight Design Pattern: Flyweight: An interface or abstract class that declares methods for managing and accessing extrinsic state. ConcreteFlyweight: Implements the Flyweight interface and defines the intrinsic state of the object....

The Facade Design Pattern is a structural pattern that provides a simplified interface to a complex subsystem. It hides the complexity of the subsystem and makes it easier to use. The pattern involves creating a facade class that delegates requests to the appropriate components of the subsystem. Components of the Facade Design Pattern: Facade: The class that provides a simplified interface to the complex subsystem. Subsystem Classes: The classes that make up the complex subsystem....

The Decorator Design Pattern is a structural pattern that allows you to dynamically add behavior to an object without altering its structure. This pattern provides a flexible alternative to subclassing for extending functionality. Components of the Decorator Design Pattern: Component: The interface or abstract class defining the common interface for both the core object and decorators. ConcreteComponent: The class implementing the Component interface. This is the core object to which additional behaviors can be added....

The Composite Design Pattern is a structural pattern that allows you to compose objects into tree-like structures to represent part-whole hierarchies. This pattern treats both individual objects and compositions of objects uniformly. It’s useful when you need to work with hierarchies of objects and want to treat single objects and compositions of objects in a consistent way. Components of the Composite Design Pattern: Component: The abstract base class or interface that declares the common interface for both leaf and composite objects....

The Bridge Design Pattern is a structural pattern that separates an abstraction from its implementation, allowing the two to vary independently. This pattern is used to decouple an abstraction from its implementation so that the two can evolve separately without affecting each other. Components of the Bridge Design Pattern: Abstraction: Defines the abstract part of the interface that uses the implementation. RefinedAbstraction: Extends the Abstraction class and provides a specific implementation....

The Adapter Design Pattern is a structural pattern that allows objects with incompatible interfaces to work together. It acts as a bridge, converting the interface of a class into another interface that clients expect. This pattern is useful when you want to use an existing class but its interface doesn’t match the one you need. Components of the Adapter Design Pattern: Target: The interface that the client expects to use. Adapter: Converts the interface of the Adaptee into the Target interface....