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method cohesion when methods need to be called in order

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This page contains an archived post to the Design Forum (formerly called the Flexible Java Forum) made prior to February 25, 2002. If you wish to participate in discussions, please visit the new Artima Forums.

Message:

method cohesion when methods need to be called in order

Posted by Aravind Subramanian on 02 Mar 1999, 10:54 AM


Consider a class that encapsulates the process of sending an
e-mail.
setContent() //sets the content
send() //sends the message

Calling setContents() after calling send() while a valid call,
has no effect. In other words setContents() has meaning only if
it is called before a send() call. How does one represent an order
in calling methods in cases where the process that detrmines
the order is less obvious than the act of sending an e-mail.

Thanks

aravind




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