What happens if you use MetaDataRepository.getPersistentTypeNames() instead?
-Patrick -- Patrick Linskey BEA Systems, Inc. _______________________________________________________________________ Notice: This email message, together with any attachments, may contain information of BEA Systems, Inc., its subsidiaries and affiliated entities, that may be confidential, proprietary, copyrighted and/or legally privileged, and is intended solely for the use of the individual or entity named in this message. If you are not the intended recipient, and have received this message in error, please immediately return this by email and then delete it. > -----Original Message----- > From: Shay Banon [mailto:[EMAIL PROTECTED] > Sent: Tuesday, January 02, 2007 12:34 AM > To: open-jpa-dev@incubator.apache.org > Subject: Re: Getting all the ClassMetaDatas > > > I tried to open the entity manager before I get the > ClassMetaData, but I > still get an empty array. Here is what I do: > > OpenJPAEntityManagerFactory emf = > OpenJPAPersistence.cast(entityManagerFactory); > EntityManager entityManager = emf.createEntityManager(); > entityManager.close(); > > ClassMetaData[] classMetaDatas = > emf.getConfiguration().getMetaDataRepositoryInstance().getMetaDatas(); > > I do enumerate the classes in my persistence context, and I > can see in the > logging that OpenJPA parses the classes. > > > Marc Prud wrote: > > > > Shay- > > > > Have you already obtained an EM from the EMF before you make this > > call? If you try to get the metadatas after calling > > emf.getEntityManager(), do you still see an empty list? > > > > Also, note that unless you enumerate the classes in your > > persistence.xml file (in the <class> elements), the only way the > > system will be able to know about your classes before they > are lazily > > evaluated is if you enable one of the scanning features (e.g., but > > packaging all your classes in a jar and specifying the <jar-file> > > element in the persistence.xml, which will be automatically > scanned > > for persistent classes). > > > > You might want to enable verbose logging and watch the make > sure the > > class metadatas are registered before you try to get the list from > > the repository. > > > > > > > > On Jan 1, 2007, at 4:11 PM, Shay Banon wrote: > > > >> > >> Hi, > >> > >> First, I hope that this is the correct forum for posting > >> questions, so > >> sorry if it isn't. > >> > >> I have an external list of classes that I would like to match > >> against the > >> persistent classes that are defined/identified by OpenJPA. > I would > >> really > >> like to get the ClassMetaData for each one, since it has a lot of > >> information that I could use. This intersection happens after the > >> EntityManagerFactory has been created. > >> > >> I have tried using:ClassMetaData[] classMetaDatas = > >> > emf.getConfiguration().getMetaDataRepositoryInstance().getMetaDatas(); > >> > >> But it seems like the meta data repository and ClassMetaData > >> information are > >> lazily loaded (i.e. when some operation is performed on a > Class, the > >> relevant meta data is fetched if not found in cache). So, what I > >> get is an > >> empty array (even though I can see the OpenJPA identified the > >> classes). > >> > >> I wonder how I would be able to get all the class meta data? > >> > >> Something that I was thinking about is since I have the list of > >> classes that > >> I would like to check if they are persistent, I could call: > >> getMetaData(Class cls, ClassLoader envLoader, boolean > mustExist), with > >> Thread context class loader and false in mustExists. I am > guessing > >> that it > >> will load the ClassMetaData if not found. My main problem > here is that > >> OpenJPA might be configured with a different class loader > (though it > >> defaults to the thread context one). > >> > >> Any suggestions? > >> > >> p.s. > >> > >> I am the author of Compass, so once I have this nailed down, we > >> will have > >> Search capabilities to OpenJPA ;) > >> > >> -- > >> View this message in context: > http://www.nabble.com/Getting-all-the- > >> ClassMetaDatas-tf2905426.html#a8116958 > >> Sent from the open-jpa-dev mailing list archive at Nabble.com. > >> > > > > > > > > -- > View this message in context: > http://www.nabble.com/Getting-all-the-ClassMetaDatas-tf2905426 .html#a8121096 > Sent from the open-jpa-dev mailing list archive at Nabble.com. > >
