Andrus Adamchik wrote: > > On Oct 25, 2007, at 7:36 PM, Gilberto C Andrade wrote: >>> In other words if that's an offer to work together with Cayenne >>> developers to address the things missing or broken in the JPA provider, >>> we will gladly accept such help. >> >> That's the intention! We hope to help and not bring more problem! > > Very cool. I would suggest to subscribe to the Cayenne dev list when > things comes to discussion of the needed Cayenne improvements. > >> We don't want to use the hibernate tags! Our idea was ignore them and >> map it by hand or with cayenne help. >> Just think as there not exists any hibernate tag, only the POJO api. >> How can we map and use them as is? > > .... > >>> As for the documentation, I suggest the JPA spec [1] for the full list >>> of annotations. >> All this new thing are annotations dependent? > > Ok, I think now I see what you are getting at. We currently advertise > using either traditional Cayenne API (i.e. inherit from > CayenneDataObject) or JPA-compatible POJOs (that require either > annotations or JPA XML descriptor). After take a look at the ejb-3_0-fr-spec-persistence.pdf file, I found how we can do it: [code] An object/relational mapping XML file contains mapping information for the classes listed in it. A object/relational mapping XML file named orm.xml may be specified in the META-INF directory in the root of the persistence unit or in the META-INF directory of any jar file referenced by the persistence.xml. Alternatively, or in addition, other mapping files may be referenced by the map-ping-file elements of the persistence-unit element, and may be present anywhere on the class path. [/code]
Mainly this one: [code] An orm.xml file or other mapping file is loaded as a resource by the persistence provider. If a mapping file is specified, the classes and mapping information specified in the mapping file will be used. [/code] Will the cayenne modeler support the ability to add Persistent Types (Entities, etc) to the ORM XML? This link http://www.eclipse.org/webtools/releases/2.0/newandnoteworthy/jpa.php (go to the end and see), illustrate the idea. > > But there is a less-known middle-ground option - POJO's working with > traditional Cayenne API. If I understand correctly you'd prefer this > option? As we've placed most of the 3.0 effort into JPA, this has been > somewhat neglected, but it is still a workable solution. Let me > elaborate on it a bit: > > * It does NOT require annotations. > * It does require regular Cayenne mapping created with CayenneModeler. > * It does require class enhancement. But how can we change/customize the mapping, since we are dealing with a legacy database? > Here is one simple example - our POJO integration tests subproject: > > https://svn.apache.org/repos/asf/cayenne/main/trunk/itests/pojo/ > > As you may see, it has a regular Cayenne .map.xml on the classpath, and > starts with the agent option: "-javaagent:cayenne-agent-3.0-SNAPSHOT.jar". > > Andrus > > > > > >
