Updated serialization and deserialization of enum collection to remov…

…e LINQ to reduce NativeAOT output size

CHANGELOG.md

@@ -7,6 +7,12 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 
+## [1.2.2] - 2024-05-21
+
+### Changed
+
+- Updated serialization and deserialization of enum collection to remove LINQ to reduce NativeAOT output size
+
 ## [1.2.1] - 2024-05-20
 
 ### Changed

src/FormParseNode.cs

@@ -192,7 +192,8 @@ private void AssignFieldValues<T>(T item) where T : IParsable
     IEnumerable<T?> IParseNode.GetCollectionOfEnumValues<T>()
 #endif
     {
-        return DecodedValue.Split(new char[] {','}, StringSplitOptions.RemoveEmptyEntries).Select(v => GetEnumValueInternal<T>(v));
+        foreach (var v in DecodedValue.Split(new char[] { ',' }, StringSplitOptions.RemoveEmptyEntries))
+            yield return GetEnumValueInternal<T>(v);
     }
 #if NET5_0_OR_GREATER
     T? IParseNode.GetEnumValue<[DynamicallyAccessedMembers(DynamicallyAccessedMemberTypes.PublicFields)] T>()

src/FormSerializationWriter.cs

@@ -206,9 +206,23 @@ public void WriteTimeValue(string? key, Time? value) {
     public void WriteCollectionOfEnumValues<T>(string? key, IEnumerable<T?>? values) where T : struct, Enum
 #endif
     {
-        if(values == null || !values.Any()) return;
-        WriteStringValue(key, string.Join(",", values.Where(static x => x.HasValue)
-            .Select(static x => x!.Value.ToString().ToFirstCharacterLowerCase())));
+        if(values == null) return;
+
+        StringBuilder? valueNames = null;
+        foreach(var x in values)
+        {
+            if(x.HasValue && Enum.GetName(typeof(T), x.Value) is string valueName)
+            {
+                if(valueNames == null)
+                    valueNames = new StringBuilder();
+                else
+                    valueNames.Append(",");
+                valueNames.Append(valueName.ToFirstCharacterLowerCase());
+            }
+        }
+
+        if(valueNames is not null)
+            WriteStringValue(key, valueNames.ToString());
     }
     /// <inheritdoc/>
 #if NET5_0_OR_GREATER

src/Microsoft.Kiota.Serialization.Form.csproj

@@ -16,7 +16,7 @@
     <PackageProjectUrl>https://aka.ms/kiota/docs</PackageProjectUrl>
     <EmbedUntrackedSources>true</EmbedUntrackedSources>
     <Deterministic>true</Deterministic>
-    <VersionPrefix>1.2.1</VersionPrefix>
+    <VersionPrefix>1.2.2</VersionPrefix>
     <VersionSuffix></VersionSuffix>
     <GeneratePackageOnBuild>true</GeneratePackageOnBuild>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>