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