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/ 4.0 / 4.0 / untmp / DEVDIV_TFS / Dev10 / Releases / RTMRel / ndp / fx / src / Data / System / Data / SqlClient / SqlUdtInfo.cs / 1305376 / SqlUdtInfo.cs
//------------------------------------------------------------------------------ //// Copyright (c) Microsoft Corporation. All Rights Reserved. // Information Contained Herein is Proprietary and Confidential. // //[....] //[....] //----------------------------------------------------------------------------- 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 Dictionarym_types2UdtInfo; internal static SqlUdtInfo TryGetFromType(Type target) { if (m_types2UdtInfo == null) m_types2UdtInfo = new Dictionary (); 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; } } } // File provided for Reference Use Only by Microsoft Corporation (c) 2007. // Copyright (c) Microsoft Corporation. All rights reserved.
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