1 files changed, 32 insertions, 0 deletions
diff --git a/guide/example/example-json-23.kt b/guide/example/example-json-23.kt
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+++ b/guide/example/example-json-23.kt
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+// This file was automatically generated from json.md by Knit tool. Do not edit.
+package example.exampleJson23
+
+import kotlinx.serialization.*
+import kotlinx.serialization.json.*
+
+import kotlinx.serialization.builtins.*
+
+@Serializable
+data class Project(
+    val name: String,
+    @Serializable(with = UserListSerializer::class)
+    val users: List<User>
+)
+
+@Serializable
+data class User(val name: String)
+
+object UserListSerializer : JsonTransformingSerializer<List<User>>(ListSerializer(User.serializer())) {
+    // If response is not an array, then it is a single object that should be wrapped into the array
+    override fun transformDeserialize(element: JsonElement): JsonElement =
+        if (element !is JsonArray) JsonArray(listOf(element)) else element
+}
+
+fun main() {
+    println(Json.decodeFromString<Project>("""
+        {"name":"kotlinx.serialization","users":{"name":"kotlin"}}
+    """))
+    println(Json.decodeFromString<Project>("""
+        {"name":"kotlinx.serialization","users":[{"name":"kotlin"},{"name":"jetbrains"}]}
+    """))
+}