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. 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