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From Shawn Bayern <bay...@essentially.net>
Subject Re: Problem with "empty" key word on a collection.
Date Thu, 13 Feb 2003 16:13:08 GMT
On Thu, 13 Feb 2003, Leon Doud wrote:

> It appears that the empty keyword doesn't always
> function on a collection.  I must be missing something
> obvious..
> 
> The folder object contains a collection of "content". 
> The useBean tag isn't initializing the Folder object.
> Its there so I can use scriptlet debugging code. 
> 
> What exactly does empty check to determine if a collection is empty or
> not?  It looks like that "empty" is checking if the folder.content is
> null or not, not if its size is zero.
> 
> Folder.getContent() returns a type of java.util.Collection.

The 'empty' operator is specified to work with java.util.List and
java.util.Map (as well as arrays and strings), not java.util.Collection in
general.

-- 
Shawn Bayern
"JSTL in Action"   http://www.manning.com/bayern


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