RE: Get primary key from persistent bean
This is a major hole in the JPA spec if you ask me. Once upon a time, there was a spec called JDO. It had a API javax.jdo.JDOHelper.getObjectId(Object pc); I think it got left out while copying ;) Pinaki Poddar BEA Systems 415.402.7317 ___ 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.
Re: Get primary key from persistent bean
Dain- Note that you could always introspect on the class and look for the @Id annotation, and get the value of the Field/Method on which the annotation resides. This is pretty heavy-handed, and doesn't work for XML mappings, but it is one possible way to do this without making assumptions about the underlying vendor. On Dec 11, 2006, at 5:45 PM, Dain Sundstrom wrote: On Dec 11, 2006, at 5:34 PM, Craig L Russell wrote: Hi Dain, How about Object pk = bean.getId(); That implies that every persistent bean implements getId(). That would work find for the beans I write but not for beans other write. This is a major hole in the JPA spec if you ask me. -dain
Re: Get primary key from persistent bean
Hi Dain, I've never seen an @Entity without an @Id annotation. I don't believe it is a valid JPA mapping without an @Id. That said, it's not required to be named Id. So are you writing a framework or sample code? For a framework, it would be nice to be portable. For sample code, who cares? Craig On Dec 11, 2006, at 5:45 PM, Dain Sundstrom wrote: On Dec 11, 2006, at 5:34 PM, Craig L Russell wrote: Hi Dain, How about Object pk = bean.getId(); That implies that every persistent bean implements getId(). That would work find for the beans I write but not for beans other write. This is a major hole in the JPA spec if you ask me. -dain Craig Russell Architect, Sun Java Enterprise System http://java.sun.com/products/jdo 408 276-5638 mailto:[EMAIL PROTECTED] P.S. A good JDO? O, Gasp! smime.p7s Description: S/MIME cryptographic signature
Re: Get primary key from persistent bean
On Dec 11, 2006, at 6:03 PM, Craig L Russell wrote: Hi Dain, I've never seen an @Entity without an @Id annotation. I don't believe it is a valid JPA mapping without an @Id. That said, it's not required to be named Id. I'm not using annotations at all. Everything is done in the mappings xml. So are you writing a framework or sample code? For a framework, it would be nice to be portable. For sample code, who cares? I'm doing both. If I determine that getting the pk from JPA is necessary for the framework, I'm just add another method to my non- portable jpa wrapper :) BTW another thing that JPA needs is an equivalent of the OpenJPA LifecycleListener. The interceptor stuff doesn't cut it since beans can override the interception and it is just a PIA to get your interceptor added to ever bean. -dain
RE: Get primary key from persistent bean
On Dec 11, 2006, at 6:03 PM, Craig L Russell wrote: Hi Dain, I've never seen an @Entity without an @Id annotation. I don't believe it is a valid JPA mapping without an @Id. That said, it's not required to be named Id. I'm not using annotations at all. Everything is done in the mappings xml. All entities must have declared identity, but they can use compound identity. BTW another thing that JPA needs is an equivalent of the OpenJPA LifecycleListener. The interceptor stuff doesn't cut it since beans can override the interception and it is just a PIA to get your interceptor added to ever bean. You might be interested in the org.apache.openjpa.event.TransactionListener stuff. Also, note that OpenJPA allows re-entrancy and full mutability in callbacks and listeners. -Patrick ___ 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.
Re: Get primary key from persistent bean
Dain Sundstrom wrote: This is a major hole in the JPA spec if you ask me. +1 ! I don't use @Id either -- View this message in context: http://www.nabble.com/Get-primary-key-from-persistent-bean-tf2796004.html#a7827429 Sent from the open-jpa-dev mailing list archive at Nabble.com.
