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//------------------------------------------------------------------------------
// <copyright file="SqlUdtInfo.cs" company="Microsoft Corporation">
// Copyright (c) Microsoft Corporation. All Rights Reserved.
// Information Contained Herein is Proprietary and Confidential.
// </copyright>
// <owner current="true" primary="true">Microsoft</owner>
// <owner current="true" primary="false">Microsoft</owner>
//------------------------------------------------------------------------------
namespace System.Data.SqlClient {
using System;
using System.Collections;
using System.Collections.Generic;
using System.Data.Common;
using System.Data.Sql;
using System.Data.SqlTypes;
using System.Diagnostics;
using System.Text;
using System.IO;
using System.Reflection;
using System.Runtime.InteropServices;
using System.Runtime.Serialization;
using System.Runtime.Serialization.Formatters.Binary;
using System.Reflection.Emit;
using System.Security.Permissions;
using Microsoft.SqlServer.Server;
internal class SqlUdtInfo {
internal readonly Microsoft.SqlServer.Server.Format SerializationFormat;
internal readonly bool IsByteOrdered;
internal readonly bool IsFixedLength;
internal readonly int MaxByteSize;
internal readonly string Name;
internal readonly string ValidationMethodName;
private SqlUdtInfo(Microsoft.SqlServer.Server.SqlUserDefinedTypeAttribute attr) {
SerializationFormat = (Microsoft.SqlServer.Server.Format)attr.Format;
IsByteOrdered = attr.IsByteOrdered;
IsFixedLength = attr.IsFixedLength;
MaxByteSize = attr.MaxByteSize;
Name = attr.Name;
ValidationMethodName= attr.ValidationMethodName;
}
internal static SqlUdtInfo GetFromType(Type target) {
SqlUdtInfo udtAttr = TryGetFromType(target);
if (udtAttr == null) {
throw InvalidUdtException.Create(target, Res.SqlUdtReason_NoUdtAttribute);
}
return udtAttr;
}
// VSTFDEVDIV 479671: Type.GetCustomAttributes is an time-expensive call.
// Improve UDT serialization performance by caching the resulted UDT type information using type-safe dictionary.
// Use a per-thread cache, so we do not need to synchronize access to it
[ThreadStatic]
private static Dictionary<Type, SqlUdtInfo> m_types2UdtInfo;
internal static SqlUdtInfo TryGetFromType(Type target) {
if (m_types2UdtInfo == null)
m_types2UdtInfo = new Dictionary<Type, SqlUdtInfo>();
SqlUdtInfo udtAttr = null;
if (!m_types2UdtInfo.TryGetValue(target, out udtAttr)) {
// query SqlUserDefinedTypeAttribute first time and cache the result
object[] attr = target.GetCustomAttributes(typeof(Microsoft.SqlServer.Server.SqlUserDefinedTypeAttribute), false);
if (attr != null && attr.Length == 1) {
udtAttr = new SqlUdtInfo((Microsoft.SqlServer.Server.SqlUserDefinedTypeAttribute)attr[0]);
}
m_types2UdtInfo.Add(target, udtAttr);
}
return udtAttr;
}
}
}
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