For existing java beans, http://code.google.com/p/protostuff might be able to help.
On Tue, Sep 14, 2010 at 8:27 PM, Roberto Caldas <roberto.cal...@gmail.com>wrote: > Yes, I tried to use the reflection API, but this doesn't seem right to me > because I have to mantain 3 classes for the same entity. When I add a new > attribute I'll have to update 3 files! I know I really cannot use JPA with > the java code generated by protoc, but using the reflection API the best > way? I was used to a java-only world where I could automatically transform > my objects into xml messages having only one class representing one entity > for all project. > > About my try on the reflection API, I did not succed and I posted one > question about it, could you please help me? I understood that I had to use > the protobuf reflection together with java reflection: > > http://groups.google.com/group/protobuf/browse_thread/thread/add9295e2151481e > > Thank you for your reply. > > > > > On Tue, Sep 14, 2010 at 3:19 PM, Kenton Varda <ken...@google.com> wrote: > >> I'm not all that familiar with JPA, but my guess is that applying JPA to a >> protocol buffer type is going to be much less efficient than using >> protobuf's native encoding. So you probably want to be serializing your >> protobufs with .toByteArray() and then persisting that. >> >> Failing that, you might want to look at the protobuf reflection API (not >> to be confused with java reflection) to see if it might be part of a >> solution: >> >> http://code.google.com/apis/protocolbuffers/docs/reference/java/com/google/protobuf/Message.html >> >> >> <http://code.google.com/apis/protocolbuffers/docs/reference/java/com/google/protobuf/Message.html>E.g. >> maybe you could call message.getAllFields() and then feed the data into JPA >> somehow. >> >> On Mon, Sep 13, 2010 at 12:09 PM, roberto_sc <roberto.cal...@gmail.com>wrote: >> >>> Hi >>> >>> I have a basic question about how to organize my project. >>> I have a client running C# code, a server running Java code and I >>> intend to use protocol buffers to exchange data. >>> I thought I could use the .proto file to describe the classes of my >>> datamodel and generate .java and .cs and then use these generated src >>> as my datamodel. But protoc generate code for message exchange and >>> cannot be edited, for example, I cannot generate java code for my >>> Person class and add the annotations to persist using JPA. >>> >>> So, the question is, do I have to mantain 3 files - .java, .cs >>> and .proto - that represent the same thing? >>> >>> Thanks >>> >>> -- >>> You received this message because you are subscribed to the Google Groups >>> "Protocol Buffers" group. >>> To post to this group, send email to proto...@googlegroups.com. >>> To unsubscribe from this group, send email to >>> protobuf+unsubscr...@googlegroups.com<protobuf%2bunsubscr...@googlegroups.com> >>> . >>> For more options, visit this group at >>> http://groups.google.com/group/protobuf?hl=en. >>> >>> >> > > > -- > virtus in medium est > . > > -- > You received this message because you are subscribed to the Google Groups > "Protocol Buffers" group. > To post to this group, send email to proto...@googlegroups.com. > To unsubscribe from this group, send email to > protobuf+unsubscr...@googlegroups.com<protobuf%2bunsubscr...@googlegroups.com> > . > For more options, visit this group at > http://groups.google.com/group/protobuf?hl=en. > -- When the cat is away, the mouse is alone. - David Yu -- You received this message because you are subscribed to the Google Groups "Protocol Buffers" group. To post to this group, send email to proto...@googlegroups.com. To unsubscribe from this group, send email to protobuf+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/protobuf?hl=en.
