Add collection serializers

Author: makeevrserg

serialization/commonMain/src/kotlinx/collections/immutable/serialization/DefaultImmutableCollectionSerializer.kt

@@ -0,0 +1,74 @@
+/*
+ * Copyright 2016-2024 JetBrains s.r.o.
+ * Use of this source code is governed by the Apache 2.0 License that can be found in the LICENSE.txt file.
+ */
+
+package kotlinx.collections.immutable.serialization
+
+import kotlinx.collections.immutable.ImmutableCollection
+import kotlinx.collections.immutable.ImmutableList
+import kotlinx.collections.immutable.ImmutableSet
+import kotlinx.collections.immutable.PersistentList
+import kotlinx.collections.immutable.PersistentSet
+import kotlinx.collections.immutable.toImmutableList
+import kotlinx.collections.immutable.toImmutableSet
+import kotlinx.collections.immutable.toPersistentHashSet
+import kotlinx.collections.immutable.toPersistentList
+import kotlinx.collections.immutable.toPersistentSet
+import kotlinx.serialization.KSerializer
+import kotlinx.serialization.builtins.ListSerializer
+import kotlinx.serialization.descriptors.SerialDescriptor
+import kotlinx.serialization.encoding.Decoder
+import kotlinx.serialization.encoding.Encoder
+
+internal class DefaultImmutableCollectionSerializer<T, C : ImmutableCollection<T>>(
+    serializer: KSerializer<T>,
+    private val transform: (Collection<T>) -> C
+) : KSerializer<C> {
+    private val listSerializer = ListSerializer(serializer)
+
+    override val descriptor: SerialDescriptor = serializer.descriptor
+
+    override fun serialize(encoder: Encoder, value: C) {
+        return listSerializer.serialize(encoder, value.toList())
+    }
+
+    override fun deserialize(decoder: Decoder): C {
+        return listSerializer.deserialize(decoder).let(transform)
+    }
+}
+
+public class ImmutableListSerializer<T>(
+    serializer: KSerializer<T>
+) : KSerializer<ImmutableList<T>> by DefaultImmutableCollectionSerializer(
+    serializer = serializer,
+    transform = { decodedList -> decodedList.toImmutableList() }
+)
+
+public class PersistentListSerializer<T>(
+    serializer: KSerializer<T>
+) : KSerializer<PersistentList<T>> by DefaultImmutableCollectionSerializer(
+    serializer = serializer,
+    transform = { decodedList -> decodedList.toPersistentList() }
+)
+
+public class ImmutableSetSerializer<T>(
+    serializer: KSerializer<T>
+) : KSerializer<ImmutableSet<T>> by DefaultImmutableCollectionSerializer(
+    serializer = serializer,
+    transform = { decodedList -> decodedList.toImmutableSet() }
+)
+
+public class PersistentSetSerializer<T>(
+    serializer: KSerializer<T>
+) : KSerializer<PersistentSet<T>> by DefaultImmutableCollectionSerializer(
+    serializer = serializer,
+    transform = { decodedList -> decodedList.toPersistentSet() }
+)
+
+public class PersistentHashSetSerializer<T>(
+    serializer: KSerializer<T>
+) : KSerializer<PersistentSet<T>> by DefaultImmutableCollectionSerializer(
+    serializer = serializer,
+    transform = { decodedList -> decodedList.toPersistentHashSet() }
+)