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Viewing changes to contrib/ICSharpCode.NRefactory/Utils/ProjectedList.cs

  • Committer: Package Import Robot
  • Author(s): Jo Shields
  • Date: 2013-05-12 09:46:03 UTC
  • mto: This revision was merged to the branch mainline in revision 29.
  • Revision ID: package-import@ubuntu.com-20130512094603-mad323bzcxvmcam0
Tags: upstream-4.0.5+dfsg
ImportĀ upstreamĀ versionĀ 4.0.5+dfsg

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contrib/ICSharpCode.NRefactory/Utils/ProjectedList.cs
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ļ»æ// Copyright (c) AlphaSierraPapa for the SharpDevelop Team
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// 
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// Permission is hereby granted, free of charge, to any person obtaining a copy of this
4
 
// software and associated documentation files (the "Software"), to deal in the Software
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// without restriction, including without limitation the rights to use, copy, modify, merge,
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// publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons
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// to whom the Software is furnished to do so, subject to the following conditions:
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// 
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// The above copyright notice and this permission notice shall be included in all copies or
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// substantial portions of the Software.
11
 
// 
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED,
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// INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR
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// PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE
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// FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
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// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
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// DEALINGS IN THE SOFTWARE.
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using System;
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using System.Collections.Generic;
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namespace ICSharpCode.NRefactory.Utils
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{
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        public sealed class ProjectedList<TInput, TOutput> : IList<TOutput> where TOutput : class
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        {
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                readonly IList<TInput> input;
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                readonly Func<TInput, TOutput> projection;
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                readonly TOutput[] items;
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                public ProjectedList(IList<TInput> input, Func<TInput, TOutput> projection)
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                {
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                        if (input == null)
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                                throw new ArgumentNullException("input");
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                        if (projection == null)
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                                throw new ArgumentNullException("projection");
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                        this.input = input;
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                        this.projection = projection;
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                        this.items = new TOutput[input.Count];
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                }
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                public TOutput this[int index] {
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                        get {
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                                TOutput output = LazyInit.VolatileRead(ref items[index]);
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                                if (output != null) {
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                                        return output;
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                                }
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                                return LazyInit.GetOrSet(ref items[index], projection(input[index]));
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                        }
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                }
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                TOutput IList<TOutput>.this[int index] {
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                        get { return this[index]; }
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                        set {
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                                throw new NotSupportedException();
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                        }
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                }
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                public int Count {
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                        get { return items.Length; }
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                }
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                bool ICollection<TOutput>.IsReadOnly {
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                        get { return true; }
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                }
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                int IList<TOutput>.IndexOf(TOutput item)
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                {
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                        var comparer = EqualityComparer<TOutput>.Default;
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                        for (int i = 0; i < this.Count; i++) {
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                                if (comparer.Equals(this[i], item))
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                                        return i;
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                        }
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                        return -1;
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                }
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                void IList<TOutput>.Insert(int index, TOutput item)
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                {
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                        throw new NotSupportedException();
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                }
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                void IList<TOutput>.RemoveAt(int index)
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                {
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                        throw new NotSupportedException();
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                }
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                void ICollection<TOutput>.Add(TOutput item)
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                {
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                        throw new NotSupportedException();
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                }
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                void ICollection<TOutput>.Clear()
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                {
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                        throw new NotSupportedException();
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                }
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                bool ICollection<TOutput>.Contains(TOutput item)
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                {
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                        var comparer = EqualityComparer<TOutput>.Default;
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                        for (int i = 0; i < this.Count; i++) {
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                                if (comparer.Equals(this[i], item))
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                                        return true;
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                        }
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                        return false;
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                }
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                void ICollection<TOutput>.CopyTo(TOutput[] array, int arrayIndex)
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                {
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                        for (int i = 0; i < items.Length; i++) {
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                                array[arrayIndex + i] = this[i];
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                        }
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                }
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                bool ICollection<TOutput>.Remove(TOutput item)
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                {
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                        throw new NotSupportedException();
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                }
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                public IEnumerator<TOutput> GetEnumerator()
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                {
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                        for (int i = 0; i < this.Count; i++) {
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                                yield return this[i];
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                        }
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                }
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                System.Collections.IEnumerator System.Collections.IEnumerable.GetEnumerator()
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                {
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                        return GetEnumerator();
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                }
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        }
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        public sealed class ProjectedList<TContext, TInput, TOutput> : IList<TOutput> where TOutput : class
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        {
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                readonly IList<TInput> input;
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                readonly TContext context;
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                readonly Func<TContext, TInput, TOutput> projection;
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                readonly TOutput[] items;
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                public ProjectedList(TContext context, IList<TInput> input, Func<TContext, TInput, TOutput> projection)
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                {
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                        if (input == null)
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                                throw new ArgumentNullException("input");
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                        if (projection == null)
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                                throw new ArgumentNullException("projection");
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                        this.input = input;
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                        this.context = context;
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                        this.projection = projection;
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                        this.items = new TOutput[input.Count];
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                }
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                public TOutput this[int index] {
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                        get {
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                                TOutput output = LazyInit.VolatileRead(ref items[index]);
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                                if (output != null) {
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                                        return output;
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                                }
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                                return LazyInit.GetOrSet(ref items[index], projection(context, input[index]));
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                        }
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                }
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                TOutput IList<TOutput>.this[int index] {
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                        get { return this[index]; }
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                        set {
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                                throw new NotSupportedException();
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                        }
165
 
                }
166
 
                
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                public int Count {
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                        get { return items.Length; }
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                }
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                bool ICollection<TOutput>.IsReadOnly {
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                        get { return true; }
173
 
                }
174
 
                
175
 
                int IList<TOutput>.IndexOf(TOutput item)
176
 
                {
177
 
                        var comparer = EqualityComparer<TOutput>.Default;
178
 
                        for (int i = 0; i < this.Count; i++) {
179
 
                                if (comparer.Equals(this[i], item))
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                                        return i;
181
 
                        }
182
 
                        return -1;
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                }
184
 
                
185
 
                void IList<TOutput>.Insert(int index, TOutput item)
186
 
                {
187
 
                        throw new NotSupportedException();
188
 
                }
189
 
                
190
 
                void IList<TOutput>.RemoveAt(int index)
191
 
                {
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                        throw new NotSupportedException();
193
 
                }
194
 
                
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                void ICollection<TOutput>.Add(TOutput item)
196
 
                {
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                        throw new NotSupportedException();
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                }
199
 
                
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                void ICollection<TOutput>.Clear()
201
 
                {
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                        throw new NotSupportedException();
203
 
                }
204
 
                
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                bool ICollection<TOutput>.Contains(TOutput item)
206
 
                {
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                        var comparer = EqualityComparer<TOutput>.Default;
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                        for (int i = 0; i < this.Count; i++) {
209
 
                                if (comparer.Equals(this[i], item))
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                                        return true;
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                        }
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                        return false;
213
 
                }
214
 
                
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                void ICollection<TOutput>.CopyTo(TOutput[] array, int arrayIndex)
216
 
                {
217
 
                        for (int i = 0; i < items.Length; i++) {
218
 
                                array[arrayIndex + i] = this[i];
219
 
                        }
220
 
                }
221
 
                
222
 
                bool ICollection<TOutput>.Remove(TOutput item)
223
 
                {
224
 
                        throw new NotSupportedException();
225
 
                }
226
 
                
227
 
                public IEnumerator<TOutput> GetEnumerator()
228
 
                {
229
 
                        for (int i = 0; i < this.Count; i++) {
230
 
                                yield return this[i];
231
 
                        }
232
 
                }
233
 
                
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                System.Collections.IEnumerator System.Collections.IEnumerable.GetEnumerator()
235
 
                {
236
 
                        return GetEnumerator();
237
 
                }
238
 
        }
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}