Why would I ever use a Chain of Responsibility over a Decorator?

Question

I\'m just reading up on the Chain of Responsibility pattern and I\'m having trouble imagining a scenario when I would prefer its use over that of decorator.

What do

Answer 1

Decorator is used when you want to add functionality to an object.

COR is used when one of many actors might take action on an object.

A particular Decorator is called to take an action, based on the type; while COR passes the object along a defined chain until one of the actors decides the action is complete.

COR might be used when there are multiple levels of escalation to different handlers -- for instance, a call center where the customer's value to the company determines if the call goes to a particular level of support.