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In software engineering, the adapter pattern is a software design pattern (also known as wrapper, an alternative naming shared with the decorator pattern) that allows the interface of an existing class to be used as another interface. [1] It is often used to make existing classes work with others without modifying their source code.
The Decorator Pattern (or an implementation of this design pattern in Python - as the above example) should not be confused with Python Decorators, a language feature of Python. They are different things. Second to the Python Wiki: The Decorator Pattern is a pattern described in the Design Patterns Book.
The decorator pattern is a design pattern used in statically-typed object-oriented programming languages to allow functionality to be added to objects at run time; Python decorators add functionality to functions and methods at definition time, and thus are a higher-level construct than decorator-pattern classes.
Decorator pattern: decorator object adds its own members, forwarding others to the decorated object. Proxy pattern : proxy object forwards member use to real object. Forwarding may be used in other patterns, but often use is modified; for example, a method call on one object results in several different methods being called on another:
Decorator dynamically adds/overrides behavior in an existing method of an object. Facade provides a simplified interface to a large body of code. Flyweight reduces the cost of creating and manipulating a large number of similar objects. Proxy provides a placeholder for another object to control access, reduce cost, and reduce complexity.
In Code Complete [15] Other Adapter, Wrapper, or Translator Convert the interface of a class into another interface clients expect. An adapter lets classes work together that could not otherwise because of incompatible interfaces. The enterprise integration pattern equivalent is the translator. Yes Yes Yes Bridge
The facade pattern (also spelled façade) is a software design pattern commonly used in object-oriented programming.Analogous to a façade in architecture, it is an object that serves as a front-facing interface masking more complex underlying or structural code.
The bridge pattern is often confused with the adapter pattern, and is often implemented using the object adapter pattern; e.g., in the Java code below. Variant: The implementation can be decoupled even more by deferring the presence of the implementation to the point where the abstraction is utilized.