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