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Posted to commits@wicket.apache.org by "Eelco Hillenius (JIRA)" <ji...@apache.org> on 2010/09/15 01:28:38 UTC
[jira] Commented: (WICKET-1130) Injection of Bound Instance Fails
with Exception
[ https://issues.apache.org/jira/browse/WICKET-1130?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12909520#action_12909520 ]
Eelco Hillenius commented on WICKET-1130:
-----------------------------------------
Hmmmpfff, well, seems like there still can be issues with it, so scratch this. See http://stackoverflow.com/questions/1706751 for the problem. We probably need to rewrite gclib out of it in order to make this work.
> 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
> Fix For: 1.5-M3
>
>
> 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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