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What is 'lookup for a class'

M Mehta
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Joined: Aug 03, 2006
Posts: 92
Hi,

I have recently started learning struts. I have a very basic question. What does the term 'lookup a class' mean. How it happens in struts.

Thanks,
Mehta
Merrill Higginson
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Joined: Feb 15, 2005
Posts: 4864
Originally posted by Me Mehta:
What does the term 'lookup a class' mean. How it happens in struts.


I suspect that what you're referring to is the fact that you idenitfy a class when you create a Struts action mapping, and then Struts "looks up" the class and executes the execute method on it. The term "lookup" refers to the way Struts finds the class in the class path, instantiates it, and then calls a method on it. Example:

<action name="myForm" path="/myAction.do" type="com.mycompany.MyAction" />

Given this action mapping, when a user enters the URL http://myserver.com/myApp/myAction.do, Struts "looks up" the class com.mycompany.MyAction, instantiates it, and calls its execute method.


Merrill
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subject: What is 'lookup for a class'