Thanks, any leads on generating json at run time using dynamicMessage. Any existing api util if you can point me to.
On Saturday, February 25, 2023 at 2:44:14 AM UTC+5:30 Adam Cozzette wrote: > I think DynamicMessage is the right approach since you need to work with > proto files that are only known at run time. This will also allow you to > generate JSON. > > On Fri, Feb 24, 2023 at 11:19 AM ritesh singh <[email protected]> wrote: > >> >> Or if there's a better different approach instead of relying on >> FileDescriptorSet and DynamicMessage - considering i have access to only >> .pb (generate by proto-lite) or .proto file. >> On Saturday, February 25, 2023 at 12:46:44 AM UTC+5:30 ritesh singh wrote: >> >>> Thanks Adam, so basically i am writing an Intellij plugin for Android >>> Studio. >>> The plugin will just take the .pb file and .proto file, run the protoc >>> compiler, generate FileDescriptorSet for proto and create a DynamicMessage >>> using generated fileDescriptorSet and .pb. >>> >>> I was wondering if there a way to generate the json schema, as in >>> key-value pair. As we know, lite version doesn't include fileds, is it >>> possible to do it at run-time, as in extract keys in any phase? >>> >>> On Saturday, February 25, 2023 at 12:30:54 AM UTC+5:30 Adam Cozzette >>> wrote: >>> >>>> A serialized protocol buffer doesn't include any type information, so >>>> before you can parse one you have to know in advance which type you're >>>> expecting. If you want to be prepared to accept either A or B, then a good >>>> solution is to put both types inside a oneof in a parent message, and then >>>> just parse the parent message normally. >>>> >>>> It doesn't matter which protobuf implementation created the .pb file, >>>> since all implementations use the same wire format. >>>> >>>> That is true that the Java lite implementation doesn't support >>>> reflection and doesn't include descriptors, so it cannot serialize protos >>>> to JSON. If you can stick to the binary format then that would be ideal >>>> since that format is useable everywhere. >>>> >>>> On Thu, Feb 23, 2023 at 5:33 PM ritesh singh <[email protected]> >>>> wrote: >>>> >>>>> Also does it matter if .pb was created using proto lite and android >>>>> end. >>>>> >>>>> I believe the lite version doesn't store fields, so converting it to >>>>> json using proto-util won't work and i need to make use of reflection. >>>>> >>>>> On Fri, 24 Feb, 2023, 6:54 am ritesh singh, <[email protected]> >>>>> wrote: >>>>> >>>>>> Thanks Adam. I will give it a shot. I thought of using *protoc* >>>>>> compiler, but what if my proto file contains nested messages >>>>>> >>>>>> >>>>>> >>>>>> >>>>>> *message A { B b = 1}* >>>>>> *message B {* >>>>>> *}* >>>>>> >>>>>> >>>>>> After running *protoc *on the proto file, it will generate 2 java >>>>>> classes. I won't know which generated class to use against my .pb file, >>>>>> as >>>>>> my plugin is only aware of .pb and .proto file. >>>>>> >>>>>> Please correct me, if am wrong. >>>>>> On Friday, February 24, 2023 at 6:42:05 AM UTC+5:30 Adam Cozzette >>>>>> wrote: >>>>>> >>>>>>> I suspect that your code is getting an error because it's trying to >>>>>>> parse a .proto file as a serialized protocol buffer. (This won't work >>>>>>> since >>>>>>> .proto files use a text representation very different from the standard >>>>>>> protobuf binary format.) Probably the best way to fix this problem >>>>>>> would be >>>>>>> to invoke protoc with --descriptor_set_out to parse the proto file and >>>>>>> convert it into a serialized FileDescriptorSet. A FileDescriptorSet is >>>>>>> just >>>>>>> a protocol buffer, so once you have it in that form you can easily >>>>>>> parse it >>>>>>> like you would parse any other serialized proto. >>>>>>> >>>>>>> On Thu, Feb 23, 2023 at 4:59 PM ritesh singh <[email protected]> >>>>>>> wrote: >>>>>>> >>>>>>>> Hello, >>>>>>>> >>>>>>>> I am working on creating a Android Studio plugin for proto data >>>>>>>> store. >>>>>>>> Android uses proto-lite, my current approach, i get the .pb file >>>>>>>> and .proto file and use the same in intellij plugin to deserialise it. >>>>>>>> >>>>>>>> >>>>>>>> >>>>>>>> >>>>>>>> >>>>>>>> >>>>>>>> >>>>>>>> >>>>>>>> >>>>>>>> >>>>>>>> >>>>>>>> >>>>>>>> *val psiFile = PsiManager.getInstance(project).findFile(protoFile) >>>>>>>> val protoFileContent = psiFile!!.text val fileDescriptorProto: >>>>>>>> DescriptorProtos.FileDescriptorProto = >>>>>>>> DescriptorProtos.FileDescriptorProto.parseFrom(protoFileContent.byteInputStream()) >>>>>>>> >>>>>>>> val fileDescriptor = >>>>>>>> Descriptors.FileDescriptor.buildFrom(fileDescriptorProto, >>>>>>>> arrayOfNulls(0)) >>>>>>>> val messageDescriptor = fileDescriptor.messageTypes[0] val buffer = >>>>>>>> pbFile.contentsToByteArray() val messageBuilder: >>>>>>>> DynamicMessage.Builder = >>>>>>>> DynamicMessage.newBuilder(messageDescriptor) >>>>>>>> messageBuilder.mergeFrom(buffer) val message = messageBuilder.build() >>>>>>>> val >>>>>>>> text: String = TextFormat.printToString(message)* >>>>>>>> >>>>>>>> Above code is throwing error in parsing step,* Protocol message >>>>>>>> tag had invalid wire type.* >>>>>>>> >>>>>>>> Thanks in advance. >>>>>>>> >>>>>>>> -- >>>>>>>> You received this message because you are subscribed to the Google >>>>>>>> Groups "Protocol Buffers" group. >>>>>>>> To unsubscribe from this group and stop receiving emails from it, >>>>>>>> send an email to [email protected]. >>>>>>>> To view this discussion on the web visit >>>>>>>> https://groups.google.com/d/msgid/protobuf/7fe3a019-e846-4792-8d8a-1655a2d93975n%40googlegroups.com >>>>>>>> >>>>>>>> <https://groups.google.com/d/msgid/protobuf/7fe3a019-e846-4792-8d8a-1655a2d93975n%40googlegroups.com?utm_medium=email&utm_source=footer> >>>>>>>> . >>>>>>>> >>>>>>> -- >>>>>> You received this message because you are subscribed to the Google >>>>>> Groups "Protocol Buffers" group. >>>>>> To unsubscribe from this group and stop receiving emails from it, >>>>>> send an email to [email protected]. >>>>>> To view this discussion on the web visit >>>>>> https://groups.google.com/d/msgid/protobuf/5042e4c5-2643-4587-812a-730206f14424n%40googlegroups.com >>>>>> >>>>>> <https://groups.google.com/d/msgid/protobuf/5042e4c5-2643-4587-812a-730206f14424n%40googlegroups.com?utm_medium=email&utm_source=footer> >>>>>> . >>>>>> >>>>> -- >>>>> You received this message because you are subscribed to the Google >>>>> Groups "Protocol Buffers" group. >>>>> To unsubscribe from this group and stop receiving emails from it, send >>>>> an email to [email protected]. >>>>> >>>> To view this discussion on the web visit >>>>> https://groups.google.com/d/msgid/protobuf/CABaCSzEG%2B19VhXjsYJpphbxA%2B3s7mAmUSiDF_Kmkkr5_Y0A%3Dsg%40mail.gmail.com >>>>> >>>>> <https://groups.google.com/d/msgid/protobuf/CABaCSzEG%2B19VhXjsYJpphbxA%2B3s7mAmUSiDF_Kmkkr5_Y0A%3Dsg%40mail.gmail.com?utm_medium=email&utm_source=footer> >>>>> . >>>>> >>>> -- >> You received this message because you are subscribed to the Google Groups >> "Protocol Buffers" group. >> To unsubscribe from this group and stop receiving emails from it, send an >> email to [email protected]. >> > To view this discussion on the web visit >> https://groups.google.com/d/msgid/protobuf/10949542-694e-48b3-8743-7711237f9725n%40googlegroups.com >> >> <https://groups.google.com/d/msgid/protobuf/10949542-694e-48b3-8743-7711237f9725n%40googlegroups.com?utm_medium=email&utm_source=footer> >> . >> > -- You received this message because you are subscribed to the Google Groups "Protocol Buffers" group. 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