Hi, MergeFrom sounds good.
The only issue that I still will have is with the repeated fields. For some of them I will have an Id attribute. So what I would like to achieve is when I merge the messages instead of adding new partial message in the list it to combine those of the repeated messages that have the same Id. >> custom algorithm based on reflection I suppose this is what I need in this case. Could you please give me a bit more information what you mean. Thanks -George ________________________________ From: Kenton Varda [mailto:ken...@google.com] Sent: Friday, August 14, 2009 2:01 PM To: George Georgiev Cc: Protocol Buffers Subject: Re: combine protobuf messages On Fri, Aug 14, 2009 at 1:18 PM, George Georgiev <georgi.georg...@citrix.com<mailto:georgi.georg...@citrix.com>> wrote: 1. How to serialize parts from the message without validation Use the "Partial" serialization and parsing methods, e.g. SerializePartialToString() and ParsePartialFromString(). These do not check required fields. 2. How to combine two parts. Or how to parse second part which may overlap some of the already existing parts Use MergeFrom(): MyMessage combined; // Iterate over messages from lowest to highest priority. for (int priority = 0; priority < max_priority; ++priority) { combined.MergeFrom(messages_by_priority[priority]); } // Check if (!combined.IsInitialized()) { cerr << "Missing required fields: " << combined.InitializationErrorString() << endl; return false; } As documented, the semantics of MergeFrom() are: "Singular fields will be overwritten, except for embedded messages which will be merged. Repeated fields will be concatenated." So, if you merge the highest-priority message last, then its values will end up taking precedence. If MergeFrom() isn't quite what you want, then you'll have to write a custom algorithm based on reflection. --~--~---------~--~----~------------~-------~--~----~ 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 -~----------~----~----~----~------~----~------~--~---
