//
// System.Configuration.Provider.ProviderCollection
//
// Authors:
// Ben Maurer (bmaurer@users.sourceforge.net)
//
// (C) 2003 Ben Maurer
//
//
// Permission is hereby granted, free of charge, to any person obtaining
// a copy of this software and associated documentation files (the
// "Software"), to deal in the Software without restriction, including
// without limitation the rights to use, copy, modify, merge, publish,
// distribute, sublicense, and/or sell copies of the Software, and to
// permit persons to whom the Software is furnished to do so, subject to
// the following conditions:
//
// The above copyright notice and this permission notice shall be
// included in all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
//
#if NET_2_0
using System.Collections;
namespace System.Configuration.Provider{
public class ProviderCollection : ICollection
{
public ProviderCollection ()
{
lookup = new Hashtable (10, StringComparer.InvariantCultureIgnoreCase);
values = new ArrayList ();
}
public virtual void Add (ProviderBase provider)
{
if (readOnly)
throw new NotSupportedException ();
if (provider == null || provider.Name == null)
throw new ArgumentNullException ();
int pos = values.Add (provider);
try {
lookup.Add (provider.Name, pos);
} catch {
values.RemoveAt (pos);
throw;
}
}
public void Clear ()
{
if (readOnly)
throw new NotSupportedException ();
values.Clear ();
lookup.Clear ();
}
public void CopyTo (ProviderBase[] array, int index)
{
values.CopyTo (array, index);
}
void ICollection.CopyTo (Array array, int index)
{
values.CopyTo (array, index);
}
public IEnumerator GetEnumerator ()
{
return values.GetEnumerator();
}
public void Remove (string name)
{
if (readOnly)
throw new NotSupportedException ();
object position = lookup [name];
if (position == null || !(position is int))
throw new ArgumentException ();
int pos = (int) position;
if (pos >= values.Count)
throw new ArgumentException ();
values.RemoveAt (pos);
lookup.Remove (name);
ArrayList changed = new ArrayList ();
foreach (DictionaryEntry de in lookup) {
if ((int) de.Value <= pos)
continue;
changed.Add (de.Key);
}
foreach (string key in changed)
lookup [key] = (int)lookup [key] - 1;
}
public void SetReadOnly ()
{
readOnly = true;
}
public int Count { get { return values.Count; } }
public bool IsSynchronized { get { return false; } }
public object SyncRoot { get { return this; } }
public ProviderBase this [string name] {
get {
object pos = lookup [name];
if (pos == null) return null;
return values [(int) pos] as ProviderBase;
}
}
Hashtable lookup;
bool readOnly;
ArrayList values;
}
}
#endif
|