Re: [eclipselink-users] Support for inner classes?

[Tom Ware <tom.ware@xxxxxxxxxx>]

There is support in EclipseLink for alternate ways of instantiating classes.

http://wiki.eclipse.org/Configuring_a_Descriptor_(ELUG)#Configuring_Instantiation_Policy

They require you to use some EclipseLink specific configuration (e.g. you will 
not be able to use pure JPA, for instance)

-Tom

James Sutherland wrote:
> EclipseLink can definitely map inner classes, but I am sure that there are
> some types of inner classes that cannot be mapped.  EclipseLink does need
> some way to instantiate an instance for a class, so if you class has no
> default constructor there may be an issue.
>
> Perhaps include an example of the exact type of inner class you want to
> persist and someone can try it out.  Or try it yourself and see if you
> encounter any issues.
>
>
> Bugzilla from stephan@xxxxxxxxxxxxxxx wrote:
> > Hi,
> >
> > We are heavily using (non-static) inner classes and were quite
> > surprised to find that most persistence frameworks do _NOT_
> > support those, simply because non-static inner classes never 
> > have a default constructor with no arguments.
> >
> > I would like to know if EclipseLink offers some means for
> > making instances of inner classes persistent. Is there API for
> > retrieving an object from persistent storage using a non-default
> > constructor?
> >
> > I have seen a couple of presentations on EclipseLink but have 
> > not yet taken a closer look, so a simple "No, its not supported" 
> > or "Yes, it can be done, but ..." would already help for our 
> > decission whether or not we should investigate EclipseLink 
> > in depth. Initial pointers where to look for such functionality
> > are of course appreciated.
> >
> > thanks,
> > Stephan
>
>
> -----
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> http://wiki.eclipse.org/User:James.sutherland.oracle.com James Sutherland 
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