Imported Upstream version 4.6.0.125

Former-commit-id: a2155e9bd80020e49e72e86c44da02a8ac0e57a4

mcs/class/referencesource/System.Data/Microsoft/SqlServer/Server/SmiContext.cs

@@ -0,0 +1,79 @@
+//------------------------------------------------------------------------------
+// <copyright file="SmiContext.cs" company="Microsoft">
+//     Copyright (c) Microsoft Corporation.  All rights reserved.
+// </copyright>
+// <owner current="true" primary="true">[....]</owner>
+// <owner current="true" primary="false">[....]</owner>
+//------------------------------------------------------------------------------
+
+namespace Microsoft.SqlServer.Server {
+
+    using System;
+    using System.Data;
+    using System.Data.Sql;
+    using System.Data.SqlTypes;
+    using System.Security.Principal;
+
+    // NOTE: connection, transaction and context pipe operations could be 
+    //       encapsulated in their own classes, and should if they get complex 
+    //       (transaction is borderline at this point).
+    internal abstract class SmiContext {
+
+        internal abstract event EventHandler OutOfScope;
+
+        internal abstract SmiConnection ContextConnection { get; }
+
+        internal abstract long ContextTransactionId { get; }
+
+        internal abstract System.Transactions.Transaction ContextTransaction { get; }
+
+        internal abstract bool HasContextPipe { get; }
+
+        internal abstract WindowsIdentity WindowsIdentity { get; }
+        
+        internal abstract SmiRecordBuffer CreateRecordBuffer (
+            SmiExtendedMetaData[]   columnMetaData,     // Extended metadata because it requires names, udttypename and xmlschemaname ignored
+            SmiEventSink            eventSink
+        );
+
+        internal abstract SmiRequestExecutor CreateRequestExecutor (
+            string                  commandText,
+            CommandType             commandType,
+            SmiParameterMetaData[]  parameterMetaData,
+            SmiEventSink            eventSink
+        );
+
+        // 
+
+        internal abstract object GetContextValue ( int key );
+
+        internal abstract void GetTriggerInfo (
+            SmiEventSink            eventSink,
+            out bool[]              columnsUpdated,
+            out TriggerAction       action,
+            out SqlXml              eventInstanceData
+        );
+
+        internal abstract void SendMessageToPipe( string message, SmiEventSink eventSink );
+
+        internal abstract void SendResultsStartToPipe( SmiRecordBuffer recordBuffer, SmiEventSink eventSink );
+
+        internal abstract void SendResultsRowToPipe( SmiRecordBuffer recordBuffer, SmiEventSink eventSink );
+
+        internal abstract void SendResultsEndToPipe( SmiRecordBuffer recordBuffer, SmiEventSink eventSink );
+
+        internal abstract void SetContextValue ( int key, object value );
+
+        // Scratch LOB storage region
+        internal virtual SmiStream GetScratchStream( SmiEventSink sink ) {
+            // Adding as of V3
+
+            // Implement body with throw because there are only a couple of ways to get to this code:
+            //  1) Client is calling this method even though the server negotiated for V2- and hasn't implemented V3 yet.
+            //  2) Server didn't implement V3, but negotiated V3+.
+            System.Data.Common.ADP.InternalError( System.Data.Common.ADP.InternalErrorCode.UnimplementedSMIMethod );
+            return null;
+        }
+    }
+}
+