zio.json.JsonFieldEncoder.scala Maven / Gradle / Ivy
/*
* Copyright 2019-2022 John A. De Goes and the ZIO Contributors
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package zio.json
/** When encoding a JSON Object, we only allow keys that implement this interface. */
trait JsonFieldEncoder[-A] {
self =>
final def contramap[B](f: B => A): JsonFieldEncoder[B] = new JsonFieldEncoder[B] {
override def unsafeEncodeField(in: B): String = self.unsafeEncodeField(f(in))
}
def unsafeEncodeField(in: A): String
}
object JsonFieldEncoder {
def apply[A](implicit a: JsonFieldEncoder[A]): JsonFieldEncoder[A] = a
implicit val string: JsonFieldEncoder[String] = new JsonFieldEncoder[String] {
def unsafeEncodeField(in: String): String = in
}
implicit val int: JsonFieldEncoder[Int] =
JsonFieldEncoder[String].contramap(_.toString)
implicit val long: JsonFieldEncoder[Long] =
JsonFieldEncoder[String].contramap(_.toString)
}