1 //--------------------------------------------------------------------- 2 // <copyright file="PropagatorFlags.cs" company="Microsoft"> 3 // Copyright (c) Microsoft Corporation. All rights reserved. 4 // </copyright> 5 // 6 // @owner cmeek 7 // @backupOwner pratikp 8 //--------------------------------------------------------------------- 9 10 namespace System.Data.Mapping.Update.Internal 11 { 12 /// <summary> 13 /// Tracks roles played by a record as it propagates 14 /// w.r.t. an update mapping view. 15 /// </summary> 16 [Flags] 17 internal enum PropagatorFlags : byte 18 { 19 /// <summary> 20 /// No role. 21 /// </summary> 22 NoFlags = 0, 23 /// <summary> 24 /// Value is unchanged. Used only for attributes that appear in updates (in other words, 25 /// in both delete and insert set). 26 /// </summary> 27 Preserve = 1, 28 /// <summary> 29 /// Value is a concurrency token. Placeholder for post Beta 2 work. 30 /// </summary> 31 ConcurrencyValue = 2, 32 /// <summary> 33 /// Value is unknown. Used only for attributes that appear in updates (in other words, 34 /// in both delete and insert set). 35 /// </summary> 36 Unknown = 8, 37 /// <summary> 38 /// Value is a key, and therefore a concurrency value, but it is shared so it 39 /// only needs to be checked in a single table (in the case of entity splitting) 40 /// </summary> 41 Key = 16, 42 /// <summary> 43 /// Value is a foreign key. 44 /// </summary> 45 ForeignKey = 32, 46 } 47 }