/
SettingsPropertyCollection.cs
123 lines (101 loc) · 3.29 KB
/
SettingsPropertyCollection.cs
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// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
using System.Collections;
namespace System.Configuration
{
public class SettingsPropertyCollection : IEnumerable, ICloneable, ICollection
{
private readonly Hashtable _hashtable;
private bool _readOnly;
public SettingsPropertyCollection()
{
_hashtable = new Hashtable(10, StringComparer.CurrentCultureIgnoreCase);
}
public void Add(SettingsProperty property)
{
if (_readOnly)
throw new NotSupportedException();
OnAdd(property);
_hashtable.Add(property.Name, property);
try
{
OnAddComplete(property);
}
catch
{
_hashtable.Remove(property.Name);
throw;
}
}
public void Remove(string name)
{
if (_readOnly)
throw new NotSupportedException();
SettingsProperty toRemove = (SettingsProperty)_hashtable[name];
if (toRemove == null)
return;
OnRemove(toRemove);
_hashtable.Remove(name);
try
{
OnRemoveComplete(toRemove);
}
catch
{
_hashtable.Add(name, toRemove);
throw;
}
}
public SettingsProperty this[string name]
{
get
{
return _hashtable[name] as SettingsProperty;
}
}
public IEnumerator GetEnumerator()
{
return _hashtable.Values.GetEnumerator();
}
public object Clone()
{
return new SettingsPropertyCollection(_hashtable);
}
public void SetReadOnly()
{
if (_readOnly)
return;
_readOnly = true;
}
public void Clear()
{
if (_readOnly)
throw new NotSupportedException();
OnClear();
_hashtable.Clear();
OnClearComplete();
}
// On* Methods for deriving classes to override. These have
// been modeled after the CollectionBase class but have
// been stripped of their "index" parameters as there is no
// visible index to this collection.
protected virtual void OnAdd(SettingsProperty property) { }
protected virtual void OnAddComplete(SettingsProperty property) { }
protected virtual void OnClear() { }
protected virtual void OnClearComplete() { }
protected virtual void OnRemove(SettingsProperty property) { }
protected virtual void OnRemoveComplete(SettingsProperty property) { }
// ICollection interface
public int Count { get { return _hashtable.Count; } }
public bool IsSynchronized { get { return false; } }
public object SyncRoot { get { return this; } }
public void CopyTo(Array array, int index)
{
_hashtable.Values.CopyTo(array, index);
}
private SettingsPropertyCollection(Hashtable h)
{
_hashtable = (Hashtable)h.Clone();
}
}
}