[jbossseam-issues] [JBoss JIRA] Commented: (JBSEAM-2478) Make Component.getInstance(class) typesafe

[Matt Drees (JIRA)]

    [ http://jira.jboss.com/jira/browse/JBSEAM-2478?page=comments#action_12394650 ] 
            
Matt Drees commented on JBSEAM-2478:
------------------------------------

I don't think this would work for manager components like org.jboss.seam.transaction.Transaction. E.g.,

(UserTransaction) Component.getInstance(Transaction.class);

Note that Transaction is not a UserTransaction.


Of course, I'd love a way to avoid that stupid cast.  It might require a new method to preserve backward-compatibility, unfortunately.
Maybe something like Component.getImplementation(UserTransaction.class).

> Make Component.getInstance(class) typesafe
> ------------------------------------------
>
>                 Key: JBSEAM-2478
>                 URL: http://jira.jboss.com/jira/browse/JBSEAM-2478
>             Project: JBoss Seam
>          Issue Type: Feature Request
>          Components: Core
>            Reporter: Christian Bauer
>            Priority: Minor
>
> I don't know why these return Object, looks to me like we can make these generic and avoid the cast:
>    public static Object getInstance(Class<?> clazz)
>    {
>       return getInstance(clazz, true);
>    }
>    public static Object getInstance(Class<?> clazz, boolean create)
>    {
>       return getInstance( getComponentName(clazz), create );
>    }
>    public static Object getInstance(Class<?> clazz, ScopeType scope)
>    {
>       return getInstance(clazz, scope, true);
>    }
>    public static Object getInstance(Class<?> clazz, ScopeType scope, boolean create)
>    {
>       return getInstance( getComponentName(clazz), scope, create );
>    }

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