You can find the algorithm in source code. http://code.google.com/p/protobuf/source/browse/trunk/src/google/protobuf/compiler/java/java_helpers.cc
On Wed, Mar 16, 2011 at 2:42 PM, Ravi <ravikumarkulan...@gmail.com> wrote: > Hi Thanks a lot for your time. > > Yes the approach looks very clean as the api getField and setField are > in built. I think we would go with this approach. > > But i am just curious to know whether protobuf published anywhere the > algorithm for deriving getter and setter method names. > > Thanks, > Ravikumar K > > On Mar 15, 3:09 pm, Dmitriy Ryaboy <dvrya...@gmail.com> wrote: >> We needed to do something similar for our project "Elephant-Bird" that >> provides support for working with Protocol Buffers in Hadoop. >> >> Protobufs have Descriptors that allow you to determine all of these things >> on the fly, without encoding method naming rules and such. >> >> Here is the relevant snippet >> fromhttps://github.com/kevinweil/elephant-bird/blob/master/src/java/com/t... >> >> public static Message addField(Message m, String name, Object value) { >> Message.Builder builder = m.toBuilder(); >> setFieldByName(builder, name, value); >> return builder.build(); >> >> } >> >> public static void setFieldByName(Message.Builder builder, String >> name, Object value) { >> FieldDescriptor fieldDescriptor = >> builder.getDescriptorForType().findFieldByName(name); >> if (value == null) { >> builder.clearField(fieldDescriptor); >> } else { >> builder.setField(fieldDescriptor, value); >> } >> } >> * >> * >> >> On Tue, Mar 15, 2011 at 2:19 AM, Ravi <ravikumarkulan...@gmail.com> wrote: >> > Hi, >> >> > We would like to know how to determine the getter and setter method >> > names generated in java builder class for a particular field defined >> > in proto message. >> >> > Of course, the simple rule says that >> > * Convert first letter of the field name to upper case >> > * prefix "get" or "set" to the field name >> >> > But we want to know all the cases considered while generating builder >> > class. >> > Like what are the special characters considered? what are the >> > exceptional cases? >> >> > Why we want this is, >> > In our framework we would be programmatically generating proto files >> > from the xsds which we have already. >> >> > Along with this we would be generating an adapter class between our >> > framework and the java class generated by protoc compiler. >> >> > This adapter would call getter and setter methods of the builder class >> > available in the builder class to retrieve the value and to build the >> > object. >> >> > Any help would be appreciated. >> >> > Thanks, >> > Ravikumar K >> >> > -- >> > You received this message because you are subscribed to the Google Groups >> > "Protocol Buffers" group. >> > To post to this group, send email to protobuf@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. > > -- > You received this message because you are subscribed to the Google Groups > "Protocol Buffers" group. > To post to this group, send email to protobuf@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. > > -- You received this message because you are subscribed to the Google Groups "Protocol Buffers" group. To post to this group, send email to protobuf@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.
