Protobuf Schema Generator

Model.proto

message Client {
  required string uuid       = 5;
  optional string accountid  = 1;
  optional string email      = 2;
  optional string status     = 3;
  optional AccessToken token = 4;
  required int64 amount = 6;
}

pbufschema.scala

object ProtobufSchemaGenerator {
  
  def schemaForMessage[P<:Message](message:Class[P])={
    val getDescriptor = message.getMethod("getDescriptor")
    val descriptor = getDescriptor.invoke(null).asInstanceOf[Descriptors.Descriptor]
    val fields = descriptor.getFields
    val table = descriptor.getName
    
    print("CREATE TABLE %s (\n" format table)
    
    for(i<-0 until fields.size){
      val field = fields.get(i)
      val exten = if (field.isRequired){
        " NOT NULL"
      } else {
        ""
      }
      val fieldtype = field.getType.toString match {
        case "STRING"  => "TEXT" + exten
        case "MESSAGE" => "VARCHAR(255) REFERENCES %s (uuid)" format field.getMessageType.getName
        case "BYTES"   => "BYTEA"
        case "DOUBLE"  => "DOUBLE"
        case "FLOAT"   => "DOUBLE PRECISION"
        case "BOOL"    => "BOOLEAN"
        case "INT32"   => "INTEGER"
        case "INT64"   => "BIGINT"
      }
      if(field.getName equals "uuid"){
        print("  %10s %s,\n" format ("uuid","VARCHAR(255)"))
      }else{
        print("  %10s %s,\n" format (field.getName,fieldtype))
      }
      
    }
    
    print("             PRIMARY KEY (uuid)\n);")
  }
  
}

result.out

CREATE TABLE Client (
        uuid VARCHAR(255),
   accountid TEXT,
       email TEXT,
      status TEXT,
       token VARCHAR(255) REFERENCES AccessToken (uuid),
      amount BIGINT,
             PRIMARY KEY (uuid)
);

message Client {
required string uuid = 5;
optional string accountid = 1;
optional string email = 2;
optional string status = 3;
optional AccessToken token = 4;
required int64 amount = 6;
}