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Swift 2 Design Patterns

You're reading from   Swift 2 Design Patterns Build robust and scalable iOS and Mac OS X game applications

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Product type Paperback
Published in Oct 2015
Publisher
ISBN-13 9781785887611
Length 224 pages
Edition 1st Edition
Languages
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Author (1):
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Julien Lange Julien Lange
Author Profile Icon Julien Lange
Julien Lange
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Toc

Comparison between the chain of responsibility and command patterns


The difference between the two patterns is the way in which the request is decoupled.

In the chain of responsibility pattern, the request is passed to potential receivers, whereas the command pattern uses a command object that encapsulates a request.

The following table describes the difference between the chain of responsibility and command patterns:

 

Chain of responsibility

Command

Client creates

Handler objects

Command objects

Different kinds of

Handler classes at different levels

Command classes and receiver classes

Client can work with

Multiple handlers

Different receivers

Client calls

Handler objects

Receiver objects

Work is done in

HandleRequest in a handler

ActionToPerform in a receiver

Decision based on

Mask in handlers

Routing in commands

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