more tests

src/test/scala/doc/org/apache/pekko/serialization/jackson/CustomAdtSerializer.scala

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+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * license agreements; and to You under the Apache License, version 2.0:
+ *
+ *   https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * This file is part of the Apache Pekko project, which was derived from Akka.
+ */
+
+/*
+ * Copyright (C) 2019-2022 Lightbend Inc. <https://www.lightbend.com>
+ */
+
+package doc.org.apache.pekko.serialization.jackson
+
+object CustomAdtSerializer {
+
+  // #adt-trait-object
+  import com.fasterxml.jackson.core.JsonGenerator
+  import com.fasterxml.jackson.core.JsonParser
+  import com.fasterxml.jackson.databind.DeserializationContext
+  import com.fasterxml.jackson.databind.SerializerProvider
+  import com.fasterxml.jackson.databind.annotation.JsonDeserialize
+  import com.fasterxml.jackson.databind.annotation.JsonSerialize
+  import com.fasterxml.jackson.databind.deser.std.StdDeserializer
+  import com.fasterxml.jackson.databind.ser.std.StdSerializer
+
+  @JsonSerialize(`using` = classOf[DirectionJsonSerializer])
+  @JsonDeserialize(`using` = classOf[DirectionJsonDeserializer])
+  sealed trait Direction
+
+  object Direction {
+    case object North extends Direction
+    case object East extends Direction
+    case object South extends Direction
+    case object West extends Direction
+  }
+
+  class DirectionJsonSerializer extends StdSerializer[Direction](classOf[Direction]) {
+    import Direction._
+
+    override def serialize(value: Direction, gen: JsonGenerator, provider: SerializerProvider): Unit = {
+      val strValue = value match {
+        case North => "N"
+        case East  => "E"
+        case South => "S"
+        case West  => "W"
+      }
+      gen.writeString(strValue)
+    }
+  }
+
+  class DirectionJsonDeserializer extends StdDeserializer[Direction](classOf[Direction]) {
+    import Direction._
+
+    override def deserialize(p: JsonParser, ctxt: DeserializationContext): Direction = {
+      p.getText match {
+        case "N" => North
+        case "E" => East
+        case "S" => South
+        case "W" => West
+      }
+    }
+  }
+
+  final case class Compass(currentDirection: Direction) extends MySerializable
+  // #adt-trait-object
+}