Re: Java Generics - "super" keyword usage

I was more impressed with the word "elliptic" - had to look it up but is an awesome word. Yes I have all those definitions. So do you mean something like this:

public <T extends IColumn> ICompactSerializer<T> serializer()
    {
        return (ICompactSerializer<T>)new MyColumnSerializer();
    }

But this causes a compiler warning. So is there no way to represent this?

Thanks
A

> Date: Thu, 20 Sep 2007 09:16:26 -0700
> From: [email protected]
> Subject: Re: [ADVANCED-JAVA] Java Generics - "super" keyword usage
> To: [email protected]
> 
> Your snippet was really elliptic. I assumed the following definitions:
> 
>     interface IColumn { }
>     interface ICompactSerializer<T> { }
>     class MyColumnSerializer implements ICompactSerializer<MyColumn> { }
>     class MyColumn implements IColumn { }
> 
> Your problem is that you declare that you are returning a
> ICompactSerializer<T> but are actually returning ICompactSerializer<MyColumn>
> Even if T somehow is a MyColumn the compiler correctly cannot
> figure it out from this context. A cast of MyColumnSerializer
> to ICompactSerializer<T> will succeed but is pretty meaningless
> w/o knowing what is T.
> 
> -- O.L.
> 
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