[jira] [Commented] (WICKET-1130) Injection of Bound Instance Fails with Exception

["Marek Šabo (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/WICKET-1130?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13015067#comment-13015067 ] 

Marek Šabo commented on WICKET-1130:
------------------------------------

This one gave me run for my money, anyway, I did suggested workaround with empty constructor but I had to set it to protected, package-private resulted in IllegalAccessException. Cheers.

> Injection of Bound Instance Fails with Exception
> ------------------------------------------------
>
>                 Key: WICKET-1130
>                 URL: https://issues.apache.org/jira/browse/WICKET-1130
>             Project: Wicket
>          Issue Type: Bug
>          Components: wicket-guice
>    Affects Versions: 1.3.0-beta4
>            Reporter: Daniel Spiewak
>            Assignee: Igor Vaynberg
>
> If I try to inject an explicitly bound instance into a component, injection fails with an exception in the creation of the CGLIB proxy:
> java.lang.IllegalArgumentException: Superclass has no null constructors but no arguments were given
> Stupidly, I forgot to save the whole stack trace and the code is now gone from my codebase (since I needed it to work).  To repeat:
> @Override
> public void configure() {
>     bind(EntityManager.class).toInstance(manager);
> }
> Seems wicket-guice is assuming that it needs to create a new instance of everything that's injected, and since EntityManager doesn't have a no-args constructor, such an action fails.  Just an assumption anyway...

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