Type mismatch, expected: CodedInputStream, actual: FileInputStream

Question

val persons = Person()
persons.mergeFrom(new FileInputStream("path_of_file"))

• Person is a scala class generated using protobuf compiler in scala.
• I just wanted to read a pdub(a binary file) and append some more content in it and then write it back to disk.
• following this link https://developers.google.com/protocol-buffers/docs/javatutorial, its in java but for my case i am trying in scala.

Error : Type mismatch, expected: CodedInputStream, actual: FileInputStream

Answer 1

You have to provide a CodedInputStream.

Change:

persons.mergeFrom(new FileInputStream("path_of_file"))

To:

persons.mergeFrom(CodedInputStream.newInstance(new FileInputStream("path_of_file")))