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From Leandro Rodrigo Saad Cruz <lean...@ibnetwork.com.br>
Subject Re: [PROPOSAL] collection inheritance
Date Tue, 18 Feb 2003 19:16:37 GMT
On Tue, 2003-02-18 at 16:02, Phil Warrick wrote:
> Leandro,
> 
> While not being a hard-core ojb developer, I would pitch in here and say 
> "yes please"!  If this could eventually be extended to all descriptors 
> it would reduce my repository size by about a factor of five and of 
> course make maintenance much less error prone...
> 
> Phil

nice ! my repository file size was greatly reduced !
if this don't go to the cvs repo, I'll send you the patch !

> 
> Leandro Rodrigo Saad Cruz wrote:
> > Hi all, I'd like to propose ( actually commit my changes to
> > src/java/org/apache/ojb/broker/metadata/RepositoryXmlHandler.java )
> > a new feature to RepositoryXmlHandler in order to make mapping objects
> > to the database simpler. What I have working today makes all collection
> > descriptors (CLDs) available to all extent classes of a class that is
> > not an interface !
> > 
> > Example. Consider this class hierarchy :
> > 
> > public abstract class BaseFoo
> > {
> > 	private List myCollection;
> > }
> > 
> > public class FooImpl
> > 	extends BaseFoo
> > {
> > 
> > }
> > 
> > With my proposal this should map to ->
> > 
> > <class-descriptor class="BaseFoo">
> >     <extent-class class-ref="FooImpl"/>
> >     ...
> >     <collection-descriptor name="myCollection"
> >                            element-class-ref=""
> >                            auto-retrieve="true"
> >                            auto-update="false"
> >                            auto-delete="false"
> >                            indirection-table="SOME_TABLE"
> >                            >
> >          <fk-pointing-to-this-class column="FOO_ID"/>
> >          <fk-pointing-to-element-class column="SOME_CLASS_ID"/>
> >    </collection-descriptor>
> > </class-descriptor>
> > 
> > <class-descriptor class="FooImpl">
> > 
> > ...  <<-- CLDs already defined :-)
> > 
> > 
> > </class-descriptor>
> > 
> > This is working only with CLDS, not reference descriptors or any other
> > type of descriptor.
> > 
> > What do you think ?
> > 
> > In my app, I have about 15 classes that benefit from collection
> > inheritance.
> > 
> > 
> 
> 
> 
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> 
> 
-- 
Leandro Rodrigo Saad Cruz
IT - Inter Business Tecnologia e Servicos (IB)
http://www.ibnetwork.com.br
http://jakarta.apache.org/ojb


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