Re: [eclipselink-users] java.lang.IllegalArgumentException

[christopher delahunt <christopher.delahunt@xxxxxxxxxx>]

Hi Dmitry,

You must have a field in the OebsView table, say OEBSID.  You can either 
map this field using
a basic mapping, in which case the attribute type should be string, or 
as a relationship (OneToOne), in which case
the attribute should be the referenced entity type.  A relationship 
mapping cannot go on a string type or you will
get this exception. 

I don't know how you have created the class, but you have to change the 
mapping or the attribute type for it to work
as it is. 

Best Regards,
Chris

dmitryerkin wrote:
> Hi, Chris!
> Thank you for your answer
>
> You are perfectly right. The ejb3.OebsView class has the oebsId attribute
> which is mapped as one to one to the ejb3.Oebskeyfields class. The type of
> oebsId is String.
> You mean I have to change the type of oebsId from String to ejb3.OebsView?
> But these classes are generated by workbench so I can not understand your
> tip.
> Sorry.
>
> Regards,
> Dmitry
>
>
>
> Christopher Delahunt wrote:
>   
> > Hello Dmitry,
> >
> > The problem isn't in the ejb3.Oebskeyfields, but in a oebsId mapping in 
> > the ejb3.OebsView class.  I believe you have a OneToOne mapping to this
> > attribute, and EclipseLink then has to try and put a Oebskeyfields 
> > object into a String - hence the exception.
> >
> > Please check your mappings and attribute types in the Oebskeyfields 
> > entity and post them if this doesn't help.
> >
> > Best Regards,
> > Chris
> >
> > dmitryerkin wrote:
> >     
> > > Hi
> > > I have got the exception which is so strange for me.
> > > Here is the log:
> > >
> > > Exception Description: Trying to set value [ejb3.Oebskeyfields@ff00ff0]
> > > for
> > > instance variable [oebsId] of type [java.lang.String] in the object.  The
> > > specified object is not an instance of the class or interface declaring
> > > the
> > > underlying field, or an unwrapping conversion has failed.
> > > Internal Exception: java.lang.IllegalArgumentException
> > > Mapping: org.eclipse.persistence.mappings.OneToOneMapping[oebsId]
> > > Descriptor: RelationalDescriptor(ejb3.OebsView -->
> > > [DatabaseTable(OEBS_VIEW)])
> > >
> > > The ejb3.Oebskeyfields has not got the oebsId attribute.
> > > This is truth but my code is trying to get the instance of another class
> > > ejb3.OebsView by invoking the next() method of cursor.
> > > These classes are joined as one to one by the oebsId attribute.
> > >
> > > Here is my code:
> > >
> > > ...
> > > ReadAllQuery queryByTime = new ReadAllQuery(OebsView.class, where);
> > > queryByTime.useScrollableCursor();
> > > ...
> > > cursorByTimeAndOrganizationId = (ScrollableCursor)
> > > uow.executeQuery(queryByTime);
> > > ...
> > > Vector<ejb3.OebsView> oebsList = new Vector<ejb3.OebsView>();
> > > oebsList = cursorByTimeAndOrganizationId.next(q);
> > > ...
> > >
> > > I can not understand at all why does it try to set value of the
> > > ejb3.Oebskeyfields class?
> > >
> > >
> > > Regards
> > > Dmitry
> > >
> > >
> > >
> > >   
> > >       
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> >
> >
> >     
>
>