Removing Json conversion from AIFunction adapter and moving to the co…

…re kernelmethod impl.

dotnet/src/SemanticKernel.Abstractions/Functions/KernelFunction.cs

@@ -567,68 +567,9 @@ public KernelAIFunction(KernelFunction kernelFunction, Kernel? kernel)
 
             // Create the KernelArguments from the supplied arguments.
             KernelArguments args = [];
-
-            var parsers = new Dictionary<Type, Func<string, object>>(12)
-            {
-                { typeof(bool), s => bool.Parse(s) },
-                { typeof(int), s => int.Parse(s) },
-                { typeof(uint), s => uint.Parse(s) },
-                { typeof(long), s => long.Parse(s) },
-                { typeof(ulong), s => ulong.Parse(s) },
-                { typeof(float), s => float.Parse(s) },
-                { typeof(double), s => double.Parse(s) },
-                { typeof(decimal), s => decimal.Parse(s) },
-                { typeof(short), s => short.Parse(s) },
-                { typeof(ushort), s => ushort.Parse(s) },
-                { typeof(byte), s => byte.Parse(s) },
-                { typeof(sbyte), s => sbyte.Parse(s) }
-            };
-
             foreach (var argument in arguments)
             {
-                if (argument.Value is null)
-                {
-                    args[argument.Key] = null;
-                    continue;
-                }
-
-                if (argument.Value is not JsonElement or JsonDocument or JsonNode)
-                {
-                    args[argument.Key] = argument.Value;
-                    continue;
-                }
-
-                // Resolve the contract used to marshal the value from JSON -- can throw if not supported or not found.
-                var parameter = this._kernelFunction.Metadata.Parameters.FirstOrDefault(p => p.Name == argument.Key);
-                if (parameter?.ParameterType is null)
-                {
-                    args[argument.Key] = argument.Value;
-                    continue;
-                }
-
-                Type parameterType = parameter.ParameterType;
-                JsonTypeInfo typeInfo = (this._kernelFunction.JsonSerializerOptions ?? JsonSerializerOptions.Default).GetTypeInfo(parameterType);
-
-                object? argumentValue = null;
-                if (argument.Value is JsonElement element && element.ValueKind == JsonValueKind.String)
-                {
-                    if (parsers.TryGetValue(parameterType, out var parser))
-                    {
-                        args[argument.Key] = parser(element.GetString()!);
-                        continue;
-                    }
-                }
-
-                argumentValue = argument.Value switch
-                {
-                    null => null, // Return as-is if null -- if the parameter is a struct this will be handled by MethodInfo.Invoke
-                    JsonElement jsonElement => JsonSerializer.Deserialize(jsonElement, typeInfo),
-                    JsonDocument doc => JsonSerializer.Deserialize(doc, typeInfo),
-                    JsonNode node => JsonSerializer.Deserialize(node, typeInfo),
-                    _ => argument.Value
-                };
-
-                args[argument.Key] = argumentValue;
+                args[argument.Key] = argument.Value;
             }
 
             // Invoke the KernelFunction.