113 lines
2.8 KiB
C#
113 lines
2.8 KiB
C#
//
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// ReadOnlyCollection.cs
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//
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// Author:
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// Jb Evain (jbevain@gmail.com)
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//
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// Copyright (c) 2008 - 2011 Jb Evain
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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;
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using System .Collections.Generic;
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namespace Mono.Collections.Generic {
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public sealed class ReadOnlyCollection<T> : Collection<T>, ICollection<T>, IList {
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static ReadOnlyCollection<T> empty;
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public static ReadOnlyCollection<T> Empty {
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get { return empty ?? (empty = new ReadOnlyCollection<T> ()); }
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}
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bool ICollection<T>.IsReadOnly {
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get { return true; }
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}
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bool IList.IsFixedSize {
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get { return true; }
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}
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bool IList.IsReadOnly {
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get { return true; }
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}
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private ReadOnlyCollection ()
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{
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}
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public ReadOnlyCollection (T [] array)
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{
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if (array == null)
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throw new ArgumentNullException ();
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Initialize (array, array.Length);
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}
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public ReadOnlyCollection (Collection<T> collection)
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{
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if (collection == null)
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throw new ArgumentNullException ();
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Initialize (collection.items, collection.size);
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}
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void Initialize (T [] items, int size)
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{
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this.items = new T [size];
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Array.Copy (items, 0, this.items, 0, size);
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this.size = size;
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}
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internal override void Grow (int desired)
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{
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throw new InvalidOperationException ();
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}
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protected override void OnAdd (T item, int index)
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{
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throw new InvalidOperationException ();
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}
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protected override void OnClear ()
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{
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throw new InvalidOperationException ();
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}
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protected override void OnInsert (T item, int index)
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{
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throw new InvalidOperationException ();
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}
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protected override void OnRemove (T item, int index)
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{
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throw new InvalidOperationException ();
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}
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protected override void OnSet (T item, int index)
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{
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throw new InvalidOperationException ();
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}
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}
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}
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