Refactor JSON/Binary context & metadata class structure

Renamed and split internal context and metadata classes for JSON and binary serialization/deserialization.
- Replaced CrossTypeDeserializerBase with DeserializeCrossTypeBase; updated all usages.
- Renamed DeserializationContextPool to JsonDeserializationContextPool; SerializationContextPool now uses JsonSerializationContext.
- Renamed DeserializeTypeMetadata to JsonDeserializeTypeMetadata; TypeMetadata to JsonTypeMetadata, each in their own files.
- Updated all method signatures and internal references to use new names.
- Simplified BinaryDeserializeTypeMetadata by removing internal property dictionary.
No changes to public APIs; improves code clarity and maintainability.

AyCode.Core/Serializers/Binaries/AcBinaryDeserializer.BinaryDeserializeTypeMetadata.cs

@@ -10,8 +10,6 @@ public static partial class AcBinaryDeserializer
 {
     internal sealed class BinaryDeserializeTypeMetadata : BinaryTypeMetadataBase
     {
-        private readonly FrozenDictionary<string, BinaryPropertySetterInfo> _properties;
-
         /// <summary>
         /// Properties array ordered alphabetically by name for index-based lookup.
         /// This matches the serializer's ordering, enabling O(1) array access.
@@ -27,10 +25,6 @@ public static partial class AcBinaryDeserializer
             {
                 PropertiesArray[i] = new BinaryPropertySetterInfo(orderedProperties[i], type);
             }
-
-            _properties = PropertiesArray.Length == 0
-                ? FrozenDictionary<string, BinaryPropertySetterInfo>.Empty
-                : PropertiesArray.ToFrozenDictionary(static p => p.Name, static p => p, StringComparer.Ordinal);
         }
 
         /// <summary>
@@ -39,10 +33,6 @@ public static partial class AcBinaryDeserializer
         [MethodImpl(MethodImplOptions.AggressiveInlining)]
         public BinaryPropertySetterInfo? GetPropertyByIndex(int index)
             => (uint)index < (uint)PropertiesArray.Length ? PropertiesArray[index] : null;
-
-        [MethodImpl(MethodImplOptions.AggressiveInlining)]
-        public bool TryGetProperty(string name, out BinaryPropertySetterInfo? propertyInfo)
-            => _properties.TryGetValue(name, out propertyInfo);
     }
 
     /// <summary>

AyCode.Core/Serializers/Binaries/AcBinaryDeserializer.CrossType.cs

@@ -14,7 +14,7 @@ public static partial class AcBinaryDeserializer
     /// </summary>
     [MethodImpl(MethodImplOptions.AggressiveInlining)]
     private static int[] GetIndexMapping(Type sourceType, Type destType, PropertyMapperDelegate? customMapper)
-        => IndexMappingCache.GetOrBuild(sourceType, destType, customMapper, CrossTypeDeserializerBase.GetOrderedProperties);
+        => IndexMappingCache.GetOrBuild(sourceType, destType, customMapper, DeserializeCrossTypeBase.GetOrderedProperties);
 
     #region Cross-Type Deserialization
 
@@ -42,14 +42,14 @@ public static partial class AcBinaryDeserializer
     public static TDest? Deserialize<TSource, TDest>(ReadOnlySpan<byte> data, AcBinarySerializerOptions options)
     {
         // Early exit checks
-        if (CrossTypeDeserializerBase.IsEmptyData(data, BinaryTypeCode.Null))
+        if (DeserializeCrossTypeBase.IsEmptyData(data, BinaryTypeCode.Null))
             return default;
 
         var sourceType = typeof(TSource);
         var destType = typeof(TDest);
 
         // Fast path: same type
-        if (CrossTypeDeserializerBase.IsSameType(sourceType, destType))
+        if (DeserializeCrossTypeBase.IsSameType(sourceType, destType))
             return Deserialize<TDest>(data, options);
 
         // Cross-type path: use index mapping
@@ -117,17 +117,17 @@ public static partial class AcBinaryDeserializer
         where TDest : class
     {
         // Validation
-        CrossTypeDeserializerBase.ValidatePopulateTarget(target);
+        DeserializeCrossTypeBase.ValidatePopulateTarget(target);
 
         // Early exit checks
-        if (CrossTypeDeserializerBase.IsEmptyData(data, BinaryTypeCode.Null))
+        if (DeserializeCrossTypeBase.IsEmptyData(data, BinaryTypeCode.Null))
             return;
 
         var sourceType = typeof(TSource);
         var destType = typeof(TDest);
 
         // Fast path: same type
-        if (CrossTypeDeserializerBase.IsSameType(sourceType, destType))
+        if (DeserializeCrossTypeBase.IsSameType(sourceType, destType))
         {
             Populate(data, target, options);
             return;

AyCode.Core/Serializers/DeserializeCrossTypeBase.cs

@@ -8,7 +8,7 @@ namespace AyCode.Core.Serializers;
 /// Utility class providing common cross-type deserialization functionality.
 /// Shared by both JSON and Binary deserializers.
 /// </summary>
-public static class CrossTypeDeserializerBase
+public static class DeserializeCrossTypeBase
 {
     /// <summary>
     /// Gets ordered properties for a type using stable PropertyIndex ordering.

AyCode.Core/Serializers/Jsons/AcJsonDeserializer.JsonDeserializationContext.cs

@@ -5,7 +5,7 @@ namespace AyCode.Core.Serializers.Jsons;
 
 public static partial class AcJsonDeserializer
 {
-    private static class DeserializationContextPool
+    private static class JsonDeserializationContextPool
     {
         private static readonly ConcurrentQueue<DeserializationContext> Pool = new();
         private const int MaxPoolSize = 16;

AyCode.Core/Serializers/Jsons/AcJsonDeserializer.JsonDeserializeTypeMetadata.cs

@@ -9,22 +9,22 @@ namespace AyCode.Core.Serializers.Jsons;
 
 public static partial class AcJsonDeserializer
 {
-    private static readonly ConcurrentDictionary<Type, DeserializeTypeMetadata> TypeMetadataCache = new();
+    private static readonly ConcurrentDictionary<Type, JsonDeserializeTypeMetadata> TypeMetadataCache = new();
 
     [MethodImpl(MethodImplOptions.AggressiveInlining)]
-    private static DeserializeTypeMetadata GetTypeMetadata(in Type type)
+    private static JsonDeserializeTypeMetadata GetTypeMetadata(in Type type)
-        => TypeMetadataCache.GetOrAdd(type, static t => new DeserializeTypeMetadata(t));
+        => TypeMetadataCache.GetOrAdd(type, static t => new JsonDeserializeTypeMetadata(t));
 
     /// <summary>
     /// JSON deserialization type metadata.
     /// Extends DeserializeTypeMetadataBase which provides cached IId info.
     /// </summary>
-    private sealed class DeserializeTypeMetadata : DeserializeTypeMetadataBase
+    private sealed class JsonDeserializeTypeMetadata : DeserializeTypeMetadataBase
     {
         public FrozenDictionary<string, PropertySetterInfo> PropertySettersFrozen { get; }
         public PropertySetterInfo[] PropertiesArray { get; } // Array for fast UTF8 linear scan (small objects)
 
-        public DeserializeTypeMetadata(Type type) : base(type)
+        public JsonDeserializeTypeMetadata(Type type) : base(type)
         {
             var props = GetSerializableProperties(type, requiresRead: true, requiresWrite: true).ToList();
 

AyCode.Core/Serializers/Jsons/AcJsonDeserializer.JsonElement.cs

@@ -110,7 +110,7 @@ public static partial class AcJsonDeserializer
     /// <summary>
     /// Copies properties from source to target using JSON metadata.
     /// </summary>
-    private static void CopyPropertiesJson(object source, object target, DeserializeTypeMetadata metadata)
+    private static void CopyPropertiesJson(object source, object target, JsonDeserializeTypeMetadata metadata)
     {
         foreach (var prop in metadata.PropertiesArray)
         {
@@ -120,7 +120,7 @@ public static partial class AcJsonDeserializer
         }
     }
 
-    private static void PopulateObjectInternal(in JsonElement element, object target, DeserializeTypeMetadata metadata, DeserializationContext context, int depth)
+    private static void PopulateObjectInternal(in JsonElement element, object target, JsonDeserializeTypeMetadata metadata, DeserializationContext context, int depth)
     {
         var propsDict = metadata.PropertySettersFrozen;
         var nextDepth = depth + 1;
@@ -143,7 +143,7 @@ public static partial class AcJsonDeserializer
         }
     }
 
-    private static void PopulateObjectInternalMerge(in JsonElement element, object target, DeserializeTypeMetadata metadata, DeserializationContext context, int depth)
+    private static void PopulateObjectInternalMerge(in JsonElement element, object target, JsonDeserializeTypeMetadata metadata, DeserializationContext context, int depth)
     {
         var propsDict = metadata.PropertySettersFrozen;
         var nextDepth = depth + 1;
@@ -234,7 +234,7 @@ public static partial class AcJsonDeserializer
             var nextDepth = depth + 1;
             
             // ChainMode: Use cached IId info from element type metadata (no runtime reflection!)
-            DeserializeTypeMetadata? elementMetadata = null;
+            JsonDeserializeTypeMetadata? elementMetadata = null;
             if (context.IsChainMode && !IsPrimitiveOrStringFast(elementType))
             {
                 elementMetadata = GetTypeMetadata(elementType);

AyCode.Core/Serializers/Jsons/AcJsonDeserializer.Utf8Reader.cs

@@ -255,7 +255,7 @@ public static partial class AcJsonDeserializer
     /// <summary>
     /// Read object from reader when we're already at StartObject.
     /// </summary>
-    private static object? ReadObjectFromReaderAtStart(ref Utf8JsonReader reader, Type targetType, DeserializeTypeMetadata metadata, byte maxDepth, int depth)
+    private static object? ReadObjectFromReaderAtStart(ref Utf8JsonReader reader, Type targetType, JsonDeserializeTypeMetadata metadata, byte maxDepth, int depth)
     {
         if (depth > maxDepth) 
         {
@@ -380,7 +380,7 @@ public static partial class AcJsonDeserializer
     /// <summary>
     /// Populate object using Utf8JsonReader streaming (no DOM allocation).
     /// </summary>
-    private static void PopulateObjectWithUtf8Reader(string json, object target, DeserializeTypeMetadata metadata, byte maxDepth)
+    private static void PopulateObjectWithUtf8Reader(string json, object target, JsonDeserializeTypeMetadata metadata, byte maxDepth)
     {
         var (buffer, length) = GetUtf8Bytes(json);
         try
@@ -442,7 +442,7 @@ public static partial class AcJsonDeserializer
     /// <summary>
     /// Populate object with merge semantics from Utf8JsonReader.
     /// </summary>
-    private static void PopulateObjectMergeFromReader(ref Utf8JsonReader reader, object target, DeserializeTypeMetadata metadata, byte maxDepth, int depth)
+    private static void PopulateObjectMergeFromReader(ref Utf8JsonReader reader, object target, JsonDeserializeTypeMetadata metadata, byte maxDepth, int depth)
     {
         var nextDepth = depth + 1;
         var maxDepthReached = nextDepth > maxDepth;
@@ -607,7 +607,7 @@ public static partial class AcJsonDeserializer
     /// <summary>
     /// Copy properties from source to target using metadata.
     /// </summary>
-    private static void CopyProperties(object source, object target, DeserializeTypeMetadata metadata)
+    private static void CopyProperties(object source, object target, JsonDeserializeTypeMetadata metadata)
     {
         foreach (var prop in metadata.PropertySettersFrozen.Values)
         {

AyCode.Core/Serializers/Jsons/AcJsonDeserializer.cs

@@ -76,7 +76,7 @@ public static partial class AcJsonDeserializer
             
             var jsonBytes = utf8Json.ToArray();
             using var doc = JsonDocument.Parse(jsonBytes);
-            var context = DeserializationContextPool.Get(options);
+            var context = JsonDeserializationContextPool.Get(options);
             try
             {
                 var result = ReadValue(doc.RootElement, targetType, context, 0);
@@ -85,7 +85,7 @@ public static partial class AcJsonDeserializer
             }
             finally
             {
-                DeserializationContextPool.Return(context);
+                JsonDeserializationContextPool.Return(context);
             }
         }
         catch (AcJsonDeserializationException) { throw; }
@@ -135,7 +135,7 @@ public static partial class AcJsonDeserializer
             }
             
             using var doc = JsonDocument.Parse(json);
-            var context = DeserializationContextPool.Get(options);
+            var context = JsonDeserializationContextPool.Get(options);
             try
             {
                 var result = ReadValue(doc.RootElement, targetType, context, 0);
@@ -144,7 +144,7 @@ public static partial class AcJsonDeserializer
             }
             finally
             {
-                DeserializationContextPool.Return(context);
+                JsonDeserializationContextPool.Return(context);
             }
         }
         catch (AcJsonDeserializationException) { throw; }
@@ -202,7 +202,7 @@ public static partial class AcJsonDeserializer
             // Reference handling requires DOM - copy to array for JsonDocument.Parse
             var jsonBytes = Encoding.UTF8.GetBytes(json);
             using var doc = JsonDocument.Parse(jsonBytes);
-            var context = DeserializationContextPool.Get(options);
+            var context = JsonDeserializationContextPool.Get(options);
             try
             {
                 var result = ReadValue(doc.RootElement, targetType, context, 0);
@@ -211,7 +211,7 @@ public static partial class AcJsonDeserializer
             }
             finally
             {
-                DeserializationContextPool.Return(context);
+                JsonDeserializationContextPool.Return(context);
             }
         }
         catch (AcJsonDeserializationException) { throw; }
@@ -287,7 +287,7 @@ public static partial class AcJsonDeserializer
             // Reference handling requires DOM - copy to array for JsonDocument.Parse
             var jsonBytes = utf8Json.ToArray();
             using var doc = JsonDocument.Parse(jsonBytes);
-            var context = DeserializationContextPool.Get(options);
+            var context = JsonDeserializationContextPool.Get(options);
             try
             {
                 var result = ReadValue(doc.RootElement, targetType, context, 0);
@@ -296,7 +296,7 @@ public static partial class AcJsonDeserializer
             }
             finally
             {
-                DeserializationContextPool.Return(context);
+                JsonDeserializationContextPool.Return(context);
             }
         }
         catch (AcJsonDeserializationException) { throw; }
@@ -398,7 +398,7 @@ public static partial class AcJsonDeserializer
             using var doc = JsonDocument.Parse(json);
             var rootElement = doc.RootElement;
             
-            var context = DeserializationContextPool.Get(options);
+            var context = JsonDeserializationContextPool.Get(options);
             context.IsMergeMode = true;
             
             try
@@ -426,7 +426,7 @@ public static partial class AcJsonDeserializer
             }
             finally
             {
-                DeserializationContextPool.Return(context);
+                JsonDeserializationContextPool.Return(context);
             }
         }
         catch (AcJsonDeserializationException) { throw; }
@@ -505,7 +505,7 @@ public static partial class AcJsonDeserializer
 
         var doc = JsonDocument.Parse(json);
         var chainTracker = new AcSerializerCommon.ChainReferenceTracker();
-        var context = DeserializationContextPool.Get(options);
+        var context = JsonDeserializationContextPool.Get(options);
         context.ChainTracker = chainTracker;
 
         try
@@ -516,7 +516,7 @@ public static partial class AcJsonDeserializer
         }
         catch
         {
-            DeserializationContextPool.Return(context);
+            JsonDeserializationContextPool.Return(context);
             doc.Dispose();
             throw;
         }
@@ -629,7 +629,7 @@ public static partial class AcJsonDeserializer
             
             if (_context != null)
             {
-                DeserializationContextPool.Return(_context);
+                JsonDeserializationContextPool.Return(_context);
                 _context = null;
             }
             _document?.Dispose();

AyCode.Core/Serializers/Jsons/AcJsonSerializer.JsonSerializationContext.cs

@@ -10,22 +10,22 @@ public static partial class AcJsonSerializer
 {
     private static class SerializationContextPool
     {
-        private static readonly ConcurrentQueue<SerializationContext> Pool = new();
+        private static readonly ConcurrentQueue<JsonSerializationContext> Pool = new();
         private const int MaxPoolSize = 16;
 
         [MethodImpl(MethodImplOptions.AggressiveInlining)]
-        public static SerializationContext Get(in AcJsonSerializerOptions options)
+        public static JsonSerializationContext Get(in AcJsonSerializerOptions options)
         {
             if (Pool.TryDequeue(out var context))
             {
                 context.Reset(options);
                 return context;
             }
-            return new SerializationContext(options);
+            return new JsonSerializationContext(options);
         }
 
         [MethodImpl(MethodImplOptions.AggressiveInlining)]
-        public static void Return(SerializationContext context)
+        public static void Return(JsonSerializationContext context)
         {
             if (Pool.Count < MaxPoolSize)
             {
@@ -35,7 +35,7 @@ public static partial class AcJsonSerializer
         }
     }
 
-    private sealed class SerializationContext : IDisposable
+    private sealed class JsonSerializationContext : IDisposable
     {
         private readonly ArrayBufferWriter<byte> _buffer;
         public Utf8JsonWriter Writer { get; private set; }
@@ -52,7 +52,7 @@ public static partial class AcJsonSerializer
             SkipValidation = true // Skip validation for performance
         };
 
-        public SerializationContext(in AcJsonSerializerOptions options)
+        public JsonSerializationContext(in AcJsonSerializerOptions options)
         {
             _buffer = new ArrayBufferWriter<byte>(4096);
             Writer = new Utf8JsonWriter(_buffer, WriterOptions);

AyCode.Core/Serializers/Jsons/AcJsonSerializer.JsonTypeMetadata.cs

@@ -7,17 +7,17 @@ namespace AyCode.Core.Serializers.Jsons;
 
 public static partial class AcJsonSerializer
 {
-    private static readonly ConcurrentDictionary<Type, TypeMetadata> TypeMetadataCache = new();
+    private static readonly ConcurrentDictionary<Type, JsonTypeMetadata> TypeMetadataCache = new();
 
     [MethodImpl(MethodImplOptions.AggressiveInlining)]
-    private static TypeMetadata GetTypeMetadata(in Type type)
+    private static JsonTypeMetadata GetTypeMetadata(in Type type)
-        => TypeMetadataCache.GetOrAdd(type, static t => new TypeMetadata(t));
+        => TypeMetadataCache.GetOrAdd(type, static t => new JsonTypeMetadata(t));
 
-    private sealed class TypeMetadata : TypeMetadataBase
+    private sealed class JsonTypeMetadata : TypeMetadataBase
     {
         public PropertyAccessor[] Properties { get; }
 
-        public TypeMetadata(Type type) : base(type)
+        public JsonTypeMetadata(Type type) : base(type)
         {
             Properties = GetSerializableProperties(type, requiresRead: true, requiresWrite: false)
                 .Select(p => new PropertyAccessor(p, type))

AyCode.Core/Serializers/Jsons/AcJsonSerializer.cs

@@ -121,7 +121,7 @@ public static partial class AcJsonSerializer
 
     #region Reference Scanning
 
-    private static void ScanReferences(object? value, SerializationContext context, int depth)
+    private static void ScanReferences(object? value, JsonSerializationContext context, int depth)
     {
         if (value == null || depth > context.MaxDepth) return;
         
@@ -150,7 +150,7 @@ public static partial class AcJsonSerializer
 
     #region Serialization
 
-    private static void WriteValue(object? value, SerializationContext context, int depth)
+    private static void WriteValue(object? value, JsonSerializationContext context, int depth)
     {
         if (value == null) { context.Writer.WriteNullValue(); return; }
         
@@ -167,7 +167,7 @@ public static partial class AcJsonSerializer
     }
 
     [MethodImpl(MethodImplOptions.AggressiveInlining)]
-    private static void WriteObject(object value, in Type type, SerializationContext context, int depth)
+    private static void WriteObject(object value, in Type type, JsonSerializationContext context, int depth)
     {
         var writer = context.Writer;
         
@@ -207,7 +207,7 @@ public static partial class AcJsonSerializer
     }
 
     [MethodImpl(MethodImplOptions.AggressiveInlining)]
-    private static void WriteArray(IEnumerable enumerable, SerializationContext context, int depth)
+    private static void WriteArray(IEnumerable enumerable, JsonSerializationContext context, int depth)
     {
         var writer = context.Writer;
         writer.WriteStartArray();
@@ -222,7 +222,7 @@ public static partial class AcJsonSerializer
     }
 
     [MethodImpl(MethodImplOptions.AggressiveInlining)]
-    private static void WriteDictionary(IDictionary dictionary, SerializationContext context, int depth)
+    private static void WriteDictionary(IDictionary dictionary, JsonSerializationContext context, int depth)
     {
         var writer = context.Writer;
         writer.WriteStartObject();