// // DecoratorHelper.cs // // Authors: // Alexander Chebaturkin (chebaturkin@gmail.com) // // Copyright (C) 2012 Alexander Chebaturkin // // Permission is hereby granted, free of charge, to any person obtaining // a copy of this software and associated documentation files (the // "Software"), to deal in the Software without restriction, including // without limitation the rights to use, copy, modify, merge, publish, // distribute, sublicense, and/or sell copies of the Software, and to // permit persons to whom the Software is furnished to do so, subject to // the following conditions: // // The above copyright notice and this permission notice shall be // included in all copies or substantial portions of the Software. // // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. // using System; using System.Collections.Generic; namespace Mono.CodeContracts.Static.DataStructures { /// /// This class is used with subroutines to substitute IStackInfo and IEdgeSubroutineAdapter to desired /// static class DecoratorHelper { private static readonly List ContextAdapters = new List (); private static object Last { get { return ContextAdapters [ContextAdapters.Count - 1]; } } public static void Push (T @this) where T : class { ContextAdapters.Add (@this); } public static void Pop () { ContextAdapters.RemoveAt (ContextAdapters.Count - 1); } public static T Dispatch (T @this) where T : class { return FindAdaptorStartingAt (@this, 0); } private static T FindAdaptorStartingAt (T @default, int startIndex) where T : class { List list = ContextAdapters; for (int i = startIndex; i < list.Count; ++i) { var obj = list [i] as T; if (obj != null) return obj; } return @default; } public static T Inner (T @this) where T : class { for (int i = 0; i < ContextAdapters.Count; i++) { if (ContextAdapters [i] == @this) { ClearDuplicates (@this, i + 1); T inner = FindAdaptorStartingAt (default(T), i + 1); if (inner != null) return inner; throw new InvalidOperationException ("No inner context found"); } } throw new InvalidOperationException ("@this is not current adaptor"); } private static void ClearDuplicates (object @this, int @from) { for (int i = from; i < ContextAdapters.Count; i++) { if (ContextAdapters [i] == @this) ContextAdapters [i] = null; } } } }