Decorator Design Pattern: Adding Functionality without Breaking Your Architecture
Se você já trabalhou com orientação a objetos por algum tempo, provavelmente já se deparou com este dilema: como adicionar novas funcionalidades a um objeto sem criar uma explosão de subclasses? Imagine um sistema de componentes gráficos onde você precisa combinar bordas, sombras, cores e efeitos de diferentes formas. Criar uma subclasse para cada combinação possível rapidamente se torna…
The article explains the Decorator design pattern, a structural pattern that allows adding behavior to individual objects dynamically and transparently, without affecting other objects of the same class. The Decorator pattern is useful when adding responsibilities to objects dynamically without modifying their source code, and when avoiding the creation of excessive subclasses to represent each combination of behaviors.
The pattern consists of four main elements: Component, Concrete Component, Decorator, and Concrete Decorator, which work together to enable flexible and modular system design. An example in Java illustrates how the pattern can be applied in practice, demonstrating its benefits, including flexibility, modularity, and adherence to the Open/Closed Principle.
The Decorator pattern is widely used in known libraries and frameworks, such as Java's java.io package.
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