October 2018
Intermediate to advanced
370 pages
9h 15m
English
Content preview from Hands-On Object-Oriented Programming with Kotlin
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Chain of responsibility
The chain of responsibility pattern is an alternative version of the if { ... } else if { ... } else if { ... } else block. According to this pattern, we have a source of request objects and a chain of processing objects. A processing object that can't handle a request passes it to another handler. The following diagram demonstrates this:
The preceding diagram contains the Request interface that is implemented by the DELETERequest, PUTRequest, POSTRequest, and GETRequest classes. The RequestHandler interface is implemented by the DELETERequestHandler, POSTRequestHandler, PUTRequestHandler, and DELETERequestHandler
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