In object-oriented programming
, the decorator pattern
is a design pattern
that allows behavior to be added to an individual object
, either statically or dynamically, without affecting the behavior of other objects from the same class
The decorator pattern is often useful for adhering to the Single Responsibility Principle
, as it allows functionality to be divided between classes with unique areas of concern.
The decorator pattern is structurally nearly identical to the chain of responsibility pattern
, the difference being that in a chain of responsibility, exactly one of the classes handles the request, while for the decorator, all classes handle the request.
The Decorator design pattern is one of the twenty-three well-known GoF design patterns that describe how to solve recurring design problems to design flexible and reusable object-oriented software, that is, objects that are easier to implement, change, test, and reuse.
What problems can the Decorator design pattern solve?
When using subclassing, different subclasses extend a class in different ways. But an extension is bound to the class at compile-time and can't be changed at run-time.
What solution does the Decorator design pattern describe?
Decorator objects that
This page was last edited on 10 February 2018, at 03:18.
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