org.alephium.serde.Deserializer.scala Maven / Gradle / Ivy

Go to download

Show more of this group Show more artifacts with this name
Show all versions of alephium-serde_2.13 Show documentation

alephium-serde

The newest version!

// Copyright 2018 The Alephium Authors
// This file is part of the alephium project.
//
// The library is free software: you can redistribute it and/or modify
// it under the terms of the GNU Lesser General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// The library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public License
// along with the library. If not, see .

package org.alephium.serde

import akka.util.ByteString

trait Deserializer[T] { self =>
  def _deserialize(input: ByteString): SerdeResult[Staging[T]]

  def deserialize(input: ByteString): SerdeResult[T] =
    _deserialize(input).flatMap { case Staging(output, rest) =>
      if (rest.isEmpty) {
        Right(output)
      } else {
        Left(SerdeError.redundant(input.size - rest.size, input.size))
      }
    }

  def validateGet[U](get: T => Option[U], error: T => String): Deserializer[U] =
    (input: ByteString) => {
      self._deserialize(input).flatMap { case Staging(t, rest) =>
        get(t) match {
          case Some(u) => Right(Staging(u, rest))
          case None    => Left(SerdeError.wrongFormat(error(t)))
        }
      }
    }
}

object Deserializer { def apply[T](implicit T: Deserializer[T]): Deserializer[T] = T }