[
https://issues.apache.org/jira/browse/WICKET-2568?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Michael Sparer updated WICKET-2568:
-----------------------------------
Attachment: dataview-bug.jar
> Unnecessary method calls in IDataProvider
> -----------------------------------------
>
> Key: WICKET-2568
> URL: https://issues.apache.org/jira/browse/WICKET-2568
> Project: Wicket
> Issue Type: Bug
> Components: wicket
> Affects Versions: 1.3.0-beta1, 1.3.0-beta2, 1.3.0-beta3, 1.3.0-beta4,
> 1.3.0-rc1, 1.3.0-rc2, 1.3.0-final, 1.3.1, 1.3.2, 1.3.3, 1.3.4, 1.3.5, 1.3.6,
> 1.3.7, 1.4-M1, 1.4-M2, 1.4-M3, 1.4-RC1, 1.4-RC2, 1.4-RC3, 1.4-RC4, 1.4-RC5,
> 1.4-RC6, 1.4-RC7, 1.4.0, 1.4.1, 1.4.2, 1.4.3
> Reporter: Michael Sparer
> Attachments: dataview-bug.jar
>
>
> Referring to the post on the mailinglist
> (http://old.nabble.com/Unnecessary-method-calls-in-IDataProvider--ts26266771.html),
> here's a quick summary of the problem:
> If the size() method of an IDataProvider returns zero, the iterator(int,int)
> method should not be called. Calling this method with value zero as second
> parameter (== count) _always_ results in returning an empty iterator.
> Therefore a lot of unnecessary method calls (and thus a lot of unnecessary
> database hits) could be saved if an empty iterator would be used by the
> DataView whenever size() returns an int <= 0.
> Please find a project attached with a junit test that illustrates the
> problem. I tested it with all major releases from 1.4.3. down to 1.3.0. with
> the same result.
--
This message is automatically generated by JIRA.
-
You can reply to this email to add a comment to the issue online.
