[jira] [Resolved] (WICKET-6104) Rework AjaxFallback** components to use java.util.Optional for their #onEvent methods

["Martin Grigorov (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/WICKET-6104?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Martin Grigorov resolved WICKET-6104.
-------------------------------------
       Resolution: Fixed
    Fix Version/s: 8.0.0-M1

> Rework AjaxFallback** components to use java.util.Optional for their #onEvent methods
> -------------------------------------------------------------------------------------
>
>                 Key: WICKET-6104
>                 URL: https://issues.apache.org/jira/browse/WICKET-6104
>             Project: Wicket
>          Issue Type: Improvement
>          Components: wicket
>    Affects Versions: 8.0.0-M1
>            Reporter: Martin Grigorov
>            Assignee: Martin Grigorov
>             Fix For: 8.0.0-M1
>
>
> At the moment Wicket's passes "null" as a AjaxRequestTarget when an AjaxFallback** component is used in a browser with disabled JavaScript.
> Sometimes application developers forget to check the passed "target" for null and try to use and this leads to NullPointerException at runtime.
> It would be better to make use of Java 8's java.util.Optional. This way the application developer cannot forget the check.



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