Improving serialization

src/abstractions/serialization/KiotaJsonSerializer.Serialization.cs

@@ -7,6 +7,8 @@
 using System.IO;
 using System.Threading;
 using System.Threading.Tasks;
+using System.ComponentModel;
+
 #if NET5_0_OR_GREATER
 using System.Diagnostics.CodeAnalysis;
 #endif
@@ -21,16 +23,19 @@ public static partial class KiotaJsonSerializer
     /// <typeparam name="T">Type of the object to serialize</typeparam>
     /// <param name="value">The object to serialize.</param>
     /// <returns>The serialized representation as a stream.</returns>
+    [Obsolete("This method is obsolete, use the extension methods in Microsoft.Kiota.Serialization.Json.IParsableExtensions instead")]
+    [EditorBrowsable(EditorBrowsableState.Never)]
     public static Stream SerializeAsStream<T>(T value) where T : IParsable
-    => KiotaSerializer.SerializeAsStream(_jsonContentType, value);
-
+        => KiotaSerializer.SerializeAsStream(_jsonContentType, value);
+    
     /// <summary>
     /// Serializes the given object into a string based on the content type.
     /// </summary>
     /// <typeparam name="T">Type of the object to serialize</typeparam>
     /// <param name="value">The object to serialize.</param>
     /// <returns>The serialized representation as a string.</returns>
-    [Obsolete("This method is obsolete, use the async method instead")]
+    [Obsolete("This method is obsolete, use the extension methods in Microsoft.Kiota.Serialization.Json.IParsableExtensions instead")]
+    [EditorBrowsable(EditorBrowsableState.Never)]
     public static string SerializeAsString<T>(T value) where T : IParsable
     => KiotaSerializer.SerializeAsString(_jsonContentType, value);
 
@@ -41,15 +46,19 @@ public static string SerializeAsString<T>(T value) where T : IParsable
     /// <param name="value">The object to serialize.</param>
     /// <param name="cancellationToken">The token to monitor for cancellation requests.</param>
     /// <returns>The serialized representation as a string.</returns>
-    public static Task<string> SerializeAsStringAsync<T>(T value, CancellationToken cancellationToken = default) where T : IParsable
-    => KiotaSerializer.SerializeAsStringAsync(_jsonContentType, value, cancellationToken);
-
+    [Obsolete("This method is obsolete, use the extension methods in Microsoft.Kiota.Serialization.Json.IParsableExtensions instead")]
+    [EditorBrowsable(EditorBrowsableState.Never)]
+    public static Task<string> SerializeAsStringAsync<T>(T value, CancellationToken cancellationToken) where T : IParsable 
+        => KiotaSerializer.SerializeAsStringAsync(_jsonContentType, value, true, cancellationToken);
+
     /// <summary>
     /// Serializes the given object into a string based on the content type.
     /// </summary>
     /// <typeparam name="T">Type of the object to serialize</typeparam>
     /// <param name="value">The object to serialize.</param>
     /// <returns>The serialized representation as a stream.</returns>
+    [Obsolete("This method is obsolete, use the extension methods in Microsoft.Kiota.Serialization.Json.IParsableExtensions instead")]
+    [EditorBrowsable(EditorBrowsableState.Never)]
     public static Stream SerializeAsStream<T>(IEnumerable<T> value) where T : IParsable
     => KiotaSerializer.SerializeAsStream(_jsonContentType, value);
 
@@ -59,7 +68,8 @@ public static Stream SerializeAsStream<T>(IEnumerable<T> value) where T : IParsa
     /// <typeparam name="T">Type of the object to serialize</typeparam>
     /// <param name="value">The object to serialize.</param>
     /// <returns>The serialized representation as a string.</returns>
-    [Obsolete("This method is obsolete, use the async method instead")]
+    [Obsolete("This method is obsolete, use the extension methods in Microsoft.Kiota.Serialization.Json.IParsableExtensions instead")]
+    [EditorBrowsable(EditorBrowsableState.Never)]
     public static string SerializeAsString<T>(IEnumerable<T> value) where T : IParsable
     => KiotaSerializer.SerializeAsString(_jsonContentType, value);
     /// <summary>
@@ -69,7 +79,8 @@ public static string SerializeAsString<T>(IEnumerable<T> value) where T : IParsa
     /// <param name="value">The object to serialize.</param>
     /// <param name="cancellationToken">The token to monitor for cancellation requests.</param>
     /// <returns>The serialized representation as a string.</returns>
-    public static Task<string> SerializeAsStringAsync<T>(IEnumerable<T> value, CancellationToken cancellationToken = default) where T : IParsable
-    => KiotaSerializer.SerializeAsStringAsync(_jsonContentType, value, cancellationToken);
-
-}
+    [Obsolete("This method is obsolete, use the extension methods in Microsoft.Kiota.Serialization.Json.IParsableExtensions instead")]
+    [EditorBrowsable(EditorBrowsableState.Never)]
+    public static Task<string> SerializeAsStringAsync<T>(IEnumerable<T> value, CancellationToken cancellationToken) where T : IParsable =>
+        KiotaSerializer.SerializeAsStringAsync(_jsonContentType, value, true, cancellationToken);
+}

src/abstractions/serialization/KiotaSerializer.Serialization.cs

@@ -7,6 +7,9 @@
 using System.IO;
 using System.Threading;
 using System.Threading.Tasks;
+using System.ComponentModel;
+
+
 #if NET5_0_OR_GREATER
 using System.Diagnostics.CodeAnalysis;
 #endif
@@ -25,12 +28,14 @@ public static partial class KiotaSerializer
     /// <typeparam name="T">Type of the object to serialize</typeparam>
     /// <param name="contentType">Content type to serialize the object to </param>
     /// <param name="value">The object to serialize.</param>
+    /// <param name="serializeOnlyChangedValues">By default, you'll only get the changed properties.</param>
     /// <returns>The serialized representation as a stream.</returns>
-    public static Stream SerializeAsStream<T>(string contentType, T value) where T : IParsable
+    public static Stream SerializeAsStream<T>(string contentType, T value, bool serializeOnlyChangedValues = true) where T : IParsable
     {
-        using var writer = GetSerializationWriter(contentType, value);
-        writer.WriteObjectValue(string.Empty, value);
-        return writer.GetSerializedContent();
+        using var writer = GetSerializationWriter(contentType, value, serializeOnlyChangedValues);
+        writer.WriteObjectValue(null, value);
+        var stream = writer.GetSerializedContent();
+        return stream;
     }
     /// <summary>
     /// Serializes the given object into a string based on the content type.
@@ -53,9 +58,20 @@ public static string SerializeAsString<T>(string contentType, T value) where T :
     /// <param name="value">The object to serialize.</param>
     /// <param name="cancellationToken">The token to monitor for cancellation requests.</param>
     /// <returns>The serialized representation as a string.</returns>
-    public static Task<string> SerializeAsStringAsync<T>(string contentType, T value, CancellationToken cancellationToken = default) where T : IParsable
+    [EditorBrowsable(EditorBrowsableState.Never)]
+    public static Task<string> SerializeAsStringAsync<T>(string contentType, T value, CancellationToken cancellationToken) where T : IParsable => SerializeAsStringAsync(contentType, value, true, cancellationToken);
+    /// <summary>
+    /// Serializes the given object into a string based on the content type.
+    /// </summary>
+    /// <typeparam name="T">Type of the object to serialize</typeparam>
+    /// <param name="contentType">Content type to serialize the object to </param>
+    /// <param name="value">The object to serialize.</param>
+    /// <param name="serializeOnlyChangedValues">By default, you'll only get the changed properties.</param>
+    /// <param name="cancellationToken">The token to monitor for cancellation requests.</param>
+    /// <returns>The serialized representation as a string.</returns>
+    public static Task<string> SerializeAsStringAsync<T>(string contentType, T value, bool serializeOnlyChangedValues = true, CancellationToken cancellationToken = default) where T : IParsable
     {
-        using var stream = SerializeAsStream(contentType, value);
+        using var stream = SerializeAsStream(contentType, value, serializeOnlyChangedValues);
         return GetStringFromStreamAsync(stream, cancellationToken);
     }
     /// <summary>
@@ -64,12 +80,14 @@ public static Task<string> SerializeAsStringAsync<T>(string contentType, T value
     /// <typeparam name="T">Type of the object to serialize</typeparam>
     /// <param name="contentType">Content type to serialize the object to </param>
     /// <param name="value">The object to serialize.</param>
+    /// <param name="serializeOnlyChangedValues">By default, you'll only get the changed properties.</param>
     /// <returns>The serialized representation as a stream.</returns>
-    public static Stream SerializeAsStream<T>(string contentType, IEnumerable<T> value) where T : IParsable
+    public static Stream SerializeAsStream<T>(string contentType, IEnumerable<T> value, bool serializeOnlyChangedValues = true) where T : IParsable
     {
-        using var writer = GetSerializationWriter(contentType, value);
-        writer.WriteCollectionOfObjectValues(string.Empty, value);
-        return writer.GetSerializedContent();
+        using var writer = GetSerializationWriter(contentType, value, serializeOnlyChangedValues);
+        writer.WriteCollectionOfObjectValues(null, value);
+        var stream = writer.GetSerializedContent();
+        return stream;
     }
     /// <summary>
     /// Serializes the given object into a string based on the content type.
@@ -90,13 +108,25 @@ public static string SerializeAsString<T>(string contentType, IEnumerable<T> val
     /// <typeparam name="T">Type of the object to serialize</typeparam>
     /// <param name="contentType">Content type to serialize the object to </param>
     /// <param name="value">The object to serialize.</param>
+    /// <param name="serializeOnlyChangedValues"></param>
     /// <param name="cancellationToken">The token to monitor for cancellation requests.</param>
     /// <returns>The serialized representation as a string.</returns>
-    public static Task<string> SerializeAsStringAsync<T>(string contentType, IEnumerable<T> value, CancellationToken cancellationToken = default) where T : IParsable
+    public static Task<string> SerializeAsStringAsync<T>(string contentType, IEnumerable<T> value, bool serializeOnlyChangedValues = true, CancellationToken cancellationToken = default) where T : IParsable
     {
-        using var stream = SerializeAsStream(contentType, value);
+        using var stream = SerializeAsStream(contentType, value, serializeOnlyChangedValues);
         return GetStringFromStreamAsync(stream, cancellationToken);
     }
+    /// <summary>
+    /// Serializes the given object into a string based on the content type.
+    /// </summary>
+    /// <typeparam name="T">Type of the object to serialize</typeparam>
+    /// <param name="contentType">Content type to serialize the object to </param>
+    /// <param name="value">The object to serialize.</param>
+    /// <param name="cancellationToken">The token to monitor for cancellation requests.</param>
+    /// <returns>The serialized representation as a string.</returns>
+    [EditorBrowsable(EditorBrowsableState.Never)]
+    public static Task<string> SerializeAsStringAsync<T>(string contentType, IEnumerable<T> value, CancellationToken cancellationToken) where T : IParsable => SerializeAsStringAsync(contentType, value, true, cancellationToken);
+
     [Obsolete("This method is obsolete, use the async method instead")]
     private static string GetStringFromStream(Stream stream)
     {
@@ -112,10 +142,10 @@ private static async Task<string> GetStringFromStreamAsync(Stream stream, Cancel
         return await reader.ReadToEndAsync().ConfigureAwait(false);
 #endif
     }
-    private static ISerializationWriter GetSerializationWriter(string contentType, object value)
+    private static ISerializationWriter GetSerializationWriter(string contentType, object value, bool serializeOnlyChangedValues = true)
     {
         if(string.IsNullOrEmpty(contentType)) throw new ArgumentNullException(nameof(contentType));
         if(value == null) throw new ArgumentNullException(nameof(value));
-        return SerializationWriterFactoryRegistry.DefaultInstance.GetSerializationWriter(contentType);
+        return SerializationWriterFactoryRegistry.DefaultInstance.GetSerializationWriter(contentType, serializeOnlyChangedValues);
     }
 }

src/abstractions/serialization/SerializationWriterFactoryRegistry.cs

@@ -26,30 +26,63 @@ public string ValidContentType
         /// Default singleton instance of the registry to be used when registering new factories that should be available by default.
         /// </summary>
         public static readonly SerializationWriterFactoryRegistry DefaultInstance = new();
+
         /// <summary>
         /// List of factories that are registered by content type.
         /// </summary>
         public ConcurrentDictionary<string, ISerializationWriterFactory> ContentTypeAssociatedFactories { get; set; } = new();
+
         /// <summary>
         /// Get the relevant <see cref="ISerializationWriter"/> instance for the given content type
         /// </summary>
         /// <param name="contentType">The content type in use</param>
         /// <returns>A <see cref="ISerializationWriter"/> instance to parse the content</returns>
         public ISerializationWriter GetSerializationWriter(string contentType)
+        => GetSerializationWriter(contentType, true);
+
+        /// <summary>
+        /// Get the relevant <see cref="ISerializationWriter"/> instance for the given content type
+        /// </summary>
+        /// <param name="contentType">The content type in use</param>
+        /// <param name="serializeOnlyChangedValues">If <see langword="true"/> will only return changed values, otherwise will return the full object </param>
+        /// <returns>A <see cref="ISerializationWriter"/> instance to parse the content</returns>
+        public ISerializationWriter GetSerializationWriter(string contentType, bool serializeOnlyChangedValues)
+        {
+            var factory = GetSerializationWriterFactory(contentType, out string actualContentType);
+            if(!serializeOnlyChangedValues && factory is Store.BackingStoreSerializationWriterProxyFactory backingStoreFactory)
+                return backingStoreFactory.GetSerializationWriter(actualContentType, false);
+
+            return factory.GetSerializationWriter(actualContentType);
+        }
+
+        /// <summary>
+        /// Get the relevant <see cref="ISerializationWriterFactory"/> instance for the given content type
+        /// </summary>
+        /// <param name="contentType">The content type in use</param>
+        /// <param name="actualContentType">The content type where a writer factory is found for</param>
+        /// <returns></returns>
+        /// <exception cref="ArgumentNullException"></exception>
+        /// <exception cref="InvalidOperationException"></exception>
+        private ISerializationWriterFactory GetSerializationWriterFactory(string contentType, out string actualContentType)
         {
             if(string.IsNullOrEmpty(contentType))
                 throw new ArgumentNullException(nameof(contentType));
 
             var vendorSpecificContentType = contentType.Split(";".ToCharArray(), StringSplitOptions.RemoveEmptyEntries)[0];
             if(ContentTypeAssociatedFactories.TryGetValue(vendorSpecificContentType, out var vendorFactory))
-                return vendorFactory.GetSerializationWriter(vendorSpecificContentType);
+            {
+                actualContentType = vendorSpecificContentType;
+                return vendorFactory;
+            }
 
             var cleanedContentType = ParseNodeFactoryRegistry.contentTypeVendorCleanupRegex.Replace(vendorSpecificContentType, string.Empty);
             if(ContentTypeAssociatedFactories.TryGetValue(cleanedContentType, out var factory))
-                return factory.GetSerializationWriter(cleanedContentType);
+            {
+                actualContentType = cleanedContentType;
+                return factory;
+            }
 
             throw new InvalidOperationException($"Content type {cleanedContentType} does not have a factory registered to be parsed");
         }
-
     }
 }

src/abstractions/serialization/SerializationWriterProxyFactory.cs

@@ -14,24 +14,28 @@ public class SerializationWriterProxyFactory : ISerializationWriterFactory
         /// <summary>
         /// The valid content type for the <see cref="SerializationWriterProxyFactory"/>
         /// </summary>
-        public string ValidContentType { get { return _concrete.ValidContentType; } }
-        private readonly ISerializationWriterFactory _concrete;
+        public string ValidContentType { get { return ProxiedSerializationWriterFactory.ValidContentType; } }
+
+        /// <summary>
+        /// The factory that is being proxied.
+        /// </summary>
+        protected readonly ISerializationWriterFactory ProxiedSerializationWriterFactory;
         private readonly Action<IParsable> _onBefore;
         private readonly Action<IParsable> _onAfter;
         private readonly Action<IParsable, ISerializationWriter> _onStartSerialization;
         /// <summary>
         /// Creates a new proxy factory that wraps the specified concrete factory while composing the before and after callbacks.
         /// </summary>
-        /// <param name="concrete">The concrete factory to wrap.</param>
+        /// <param name="factoryToWrap">The concrete factory to wrap.</param>
         /// <param name="onBeforeSerialization">The callback to invoke before the serialization of any model object.</param>
         /// <param name="onAfterSerialization">The callback to invoke after the serialization of any model object.</param>
         /// <param name="onStartSerialization">The callback to invoke when serialization of the entire model has started.</param>
-        public SerializationWriterProxyFactory(ISerializationWriterFactory concrete,
+        public SerializationWriterProxyFactory(ISerializationWriterFactory factoryToWrap,
             Action<IParsable> onBeforeSerialization,
             Action<IParsable> onAfterSerialization,
             Action<IParsable, ISerializationWriter> onStartSerialization)
         {
-            _concrete = concrete ?? throw new ArgumentNullException(nameof(concrete));
+            ProxiedSerializationWriterFactory = factoryToWrap ?? throw new ArgumentNullException(nameof(factoryToWrap));
             _onBefore = onBeforeSerialization;
             _onAfter = onAfterSerialization;
             _onStartSerialization = onStartSerialization;
@@ -43,7 +47,7 @@ public SerializationWriterProxyFactory(ISerializationWriterFactory concrete,
         /// <returns>A new <see cref="ISerializationWriter" /> instance for the given content type.</returns>
         public ISerializationWriter GetSerializationWriter(string contentType)
         {
-            var writer = _concrete.GetSerializationWriter(contentType);
+            var writer = ProxiedSerializationWriterFactory.GetSerializationWriter(contentType);
             var originalBefore = writer.OnBeforeObjectSerialization;
             var originalAfter = writer.OnAfterObjectSerialization;
             var originalStart = writer.OnStartObjectSerialization;

src/abstractions/store/BackingStoreSerializationWriterProxyFactory.cs

@@ -37,5 +37,19 @@ public BackingStoreSerializationWriterProxyFactory(ISerializationWriterFactory c
                 }
             })
         { }
+
+        /// <summary>
+        /// Get the serialization writer for the given content type.
+        /// </summary>
+        /// <param name="contentType">The content type for which a serialization writer should be created.</param>
+        /// <param name="serializeOnlyChangedValues">By default, a backing store is used, and you'll only get changed properties</param>
+        /// <returns></returns>
+        public ISerializationWriter GetSerializationWriter(string contentType, bool serializeOnlyChangedValues)
+        {
+            if(serializeOnlyChangedValues)
+                return base.GetSerializationWriter(contentType);
+
+            return ProxiedSerializationWriterFactory.GetSerializationWriter(contentType);
+        }
     }
 }