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Posted to dev@openjpa.apache.org by Julien Martin <ba...@gmail.com> on 2007/11/05 16:09:45 UTC

Annotations and JPA

Hello,

I am looking into the source code of OpenJpa and I am trying to better
understand how it is implemented.
My question relates to annotation processing by OpenJpa. Let's take a simple
JPA annotation : [code]@Column[/code].

I would like to know:
-What is the class in charge of processing the annotation (at runtime I
suppose)?
-How and when is the relevant method of that class invoked (at runtime I
suppose)?

Any clue welcome,

Thanks in advance for your replies,

Julien.

Re: Annotations and JPA

Posted by Julien Martin <ba...@gmail.com>.

Thanks a lot for replying,
I am going to have a look at these classes.
Julien.

2007/11/5, Patrick Linskey <pl...@gmail.com>:
>
> Hi,
>
> JPA annotations are parsed in the AnnotationPersistenceMetaDataParser
> and  AnnotationPersistenceMappingParser. @Column is a JDBC-specific
> annotation, so is handled by AnnotationPersistenceMappingParser.
>
> Note that XML configuration files override the JPA annotations.
>
> -Patrick
>
> On Nov 5, 2007 7:09 AM, Julien Martin <ba...@gmail.com> wrote:
> > Hello,
> >
> > I am looking into the source code of OpenJpa and I am trying to better
> > understand how it is implemented.
> > My question relates to annotation processing by OpenJpa. Let's take a
> simple
> > JPA annotation : [code]@Column[/code].
> >
> > I would like to know:
> > -What is the class in charge of processing the annotation (at runtime I
> > suppose)?
> > -How and when is the relevant method of that class invoked (at runtime I
> > suppose)?
> >
> > Any clue welcome,
> >
> > Thanks in advance for your replies,
> >
> > Julien.
> >
>
>
>
> --
> Patrick Linskey
> 202 669 5907
>

Re: Annotations and JPA

Posted by Patrick Linskey <pl...@gmail.com>.

Hi,

JPA annotations are parsed in the AnnotationPersistenceMetaDataParser
and  AnnotationPersistenceMappingParser. @Column is a JDBC-specific
annotation, so is handled by AnnotationPersistenceMappingParser.

Note that XML configuration files override the JPA annotations.

-Patrick

On Nov 5, 2007 7:09 AM, Julien Martin <ba...@gmail.com> wrote:
> Hello,
>
> I am looking into the source code of OpenJpa and I am trying to better
> understand how it is implemented.
> My question relates to annotation processing by OpenJpa. Let's take a simple
> JPA annotation : [code]@Column[/code].
>
> I would like to know:
> -What is the class in charge of processing the annotation (at runtime I
> suppose)?
> -How and when is the relevant method of that class invoked (at runtime I
> suppose)?
>
> Any clue welcome,
>
> Thanks in advance for your replies,
>
> Julien.
>



-- 
Patrick Linskey
202 669 5907