Re: [eclipselink-users] NullPointerException for ManyToOne ingeneric Emb

["Guy Pelletier" <guy.pelletier@xxxxxxxxxx>]

If I understand you correctly you want to do something like this:

Entity1 {
@ManyToOne
public Entity3<Integer> entity3;
}

Entity2 {
@ManyToOne
public Entity3<String> entity3;
}

Entity 3<X> {
   public X fooBar;
}

Is this correct? If so, no we currently don't support this type of 
configuration. Internally fooBar is represented as a single mapping with a 
static type. You may want to append this to the bug you entered previously 
to have someone at it.

In the mean time you could use inheritance and a mappedsuperclass to get 
around this, i.e.:

RootEntity {}

MappedSuperclass<X>  extends RootEntity {
   public X fooBar;
}

EntityInteger extends MappedSuperclass<Integer> {}

EntityString extends MappedSupeclass<String> {}

Entity1 {
@ManyToOne
public EntityInteger entityInteger;
}

Entity2 {
@ManyToOne
public EntityString entityString;
}

Cheers,
Guy

----- Original Message ----- 
From: "jml83" <jeffrey.m.leong@xxxxxxxxx>
To: <eclipselink-users@xxxxxxxxxxx>
Sent: Tuesday, July 21, 2009 11:29 AM
Subject: Re: [eclipselink-users] NullPointerException for ManyToOne 
ingeneric Embeddable


> It seems this problem is not just for classes marked Embeddable. I removed
> all embeddables and now I am getting this error for any parametrized
> reference to an Entity. This would seem to imply this is broken for any
> domain model with generics. This is surprising, and incredibly 
> frustrating.
>
> Is Eclipselink meant to work with Generics?
> --
> View this message in context: 
> http://www.nabble.com/NullPointerException-for-ManyToOne-in-generic-Embeddable-tp24535000p24589987.html
> Sent from the EclipseLink - Users mailing list archive at Nabble.com.
>
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