Code:
/ 4.0 / 4.0 / untmp / DEVDIV_TFS / Dev10 / Releases / RTMRel / ndp / fx / src / DataEntity / System / Data / SqlClient / SqlGen / SymbolUsageManager.cs / 1305376 / SymbolUsageManager.cs
//---------------------------------------------------------------------- //// Copyright (c) Microsoft Corporation. All rights reserved. // // // @owner [....] //--------------------------------------------------------------------- using System; using System.Collections.Generic; namespace System.Data.SqlClient.SqlGen { ////// Used for wrapping a boolean value as an object. /// internal class BoolWrapper { internal bool Value {get; set;} internal BoolWrapper() { this.Value = false; } } ////// Tracks the usage of symbols. /// When registering a symbol with the usage manager if an input symbol is specified, /// than the usage of the two is 'connected' - if one ever gets marked as used, /// the other one becomes 'used' too. /// internal class SymbolUsageManager { private readonly DictionaryoptionalColumnUsage = new Dictionary (); internal bool ContainsKey(Symbol key) { return optionalColumnUsage.ContainsKey(key); } internal bool TryGetValue(Symbol key, out bool value) { BoolWrapper wrapper; if (optionalColumnUsage.TryGetValue(key, out wrapper)) { value = wrapper.Value; return true; } value = false; return false; } internal void Add(Symbol sourceSymbol, Symbol symbolToAdd) { BoolWrapper wrapper; if (sourceSymbol == null || !this.optionalColumnUsage.TryGetValue(sourceSymbol, out wrapper)) { wrapper = new BoolWrapper(); } this.optionalColumnUsage.Add(symbolToAdd, wrapper); } internal void MarkAsUsed(Symbol key) { if (optionalColumnUsage.ContainsKey(key)) { optionalColumnUsage[key].Value = true; } } internal bool IsUsed(Symbol key) { return optionalColumnUsage[key].Value; } } } // File provided for Reference Use Only by Microsoft Corporation (c) 2007.
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