75 lines
2.2 KiB
C#
75 lines
2.2 KiB
C#
//----------------------------------------------------------
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// Copyright (c) Microsoft Corporation. All rights reserved.
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//------------------------------------------------------------
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namespace System.IdentityModel
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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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using System.Collections.ObjectModel;
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//
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// A collection that can be made immutable by calling the
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// MakeReadOnly method. Once the collection is made read-only
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// Add, Remove and Clear methods will throw an exception
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// failing to add a item to the collection.
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//
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internal sealed class ImmutableCollection<T> : Collection<T>, IList<T>, IList
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{
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bool isReadOnly = false;
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public void MakeReadOnly()
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{
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this.isReadOnly = true;
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}
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public bool IsReadOnly
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{
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get { return this.isReadOnly; }
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}
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protected override void ClearItems()
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{
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if (this.isReadOnly)
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throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(new InvalidOperationException(SR.GetString(SR.ObjectIsReadOnly)));
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base.ClearItems();
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}
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protected override void InsertItem(int index, T item)
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{
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if (this.isReadOnly)
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throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(new InvalidOperationException(SR.GetString(SR.ObjectIsReadOnly)));
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base.InsertItem(index, item);
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}
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protected override void RemoveItem(int index)
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{
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if (this.isReadOnly)
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throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(new InvalidOperationException(SR.GetString(SR.ObjectIsReadOnly)));
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base.RemoveItem(index);
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}
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protected override void SetItem(int index, T item)
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{
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if (this.isReadOnly)
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throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(new InvalidOperationException(SR.GetString(SR.ObjectIsReadOnly)));
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base.SetItem(index, item);
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}
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bool ICollection<T>.IsReadOnly
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{
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get { return this.isReadOnly; }
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}
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bool IList.IsReadOnly
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{
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get { return this.isReadOnly; }
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}
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}
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}
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