Protobuf Descriptor Parser

A library that provides extension functions for parsing the basic descriptors of Protocol Buffers, which allows you to create descriptors without code compilation, which is especially useful when working with dynamic messages.

Descriptors

You can change any parsing method by calling toBuilder()

Wire Schema class name	Protobuf Kotlin class name	Method name
EnumConstantElement	EnumValueDescriptorProto	enumValueDescriptorProto
EnumElement	EnumDescriptorProto	enumDescriptorProto
FieldElement	FieldDescriptorProto	fieldDescriptorProto
MessageElement	DescriptorProto	descriptorProto
ProtoFileElement	FileDescriptorProto	fileDescriptorProto
RpcElement	MethodDescriptorProto	methodDescriptorProto
ServiceElement	ServiceDescriptorProto	serviceDescriptorProto

Dependencies

You can exclude dependencies if they are already in use

Protobuf Kotlin

Documentation - v3.23.4

Wire Schema

Documentation - v4.8.0

Installation

build.gradle

    allprojects {
        repositories {
            maven { url 'https://jitpack.io' }
        }
    }

    dependencies {
        implementation('com.github.numq:protobuf-descriptor-parser:1.0.0') {
            exclude group: 'com.google.protobuf', module: 'protobuf-kotlin'
            exclude group: 'com.squareup.wire', module: 'wire-schema'
        }
    }

build.gradle.kts

    allprojects {
        repositories {
            maven("https://jitpack.io")
        }
    }
    
    dependencies {
        implementation("com.github.numq:protobuf-descriptor-parser:1.0.0") {
            exclude(group = "com.google.protobuf", module = "protobuf-kotlin")
            exclude(group = "com.squareup.wire", module = "wire-schema")
        }
    }

Usage

val protoFile = File("./path/to/*.proto")
val schema = ProtoParser.parse(Location.get(path), proto.readText())
val descriptor = Descriptors.FileDescriptor.buildFrom(schema.parseDescriptor(protoFile.name), arrayOf())
// Use descriptor to create a dynamic message or for other purposes