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ExtensionNodeList.cs

//
// ExtensionNodeList.cs
//
// Author:
//   Lluis Sanchez Gual
//
// Copyright (C) 2007 Novell, Inc (http://www.novell.com)
//
// 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.
//


using System;
using System.Collections;

namespace Mono.Addins
{
      public class ExtensionNodeList: IEnumerable
      {
            internal ArrayList list;
            
            internal static ExtensionNodeList Empty = new ExtensionNodeList (new ArrayList ());
            
            internal ExtensionNodeList (ArrayList list)
            {
                  this.list = list;
            }
            
            public ExtensionNode this [int n] {
                  get {
                        if (list == null)
                              throw new System.IndexOutOfRangeException ();
                        else
                              return (ExtensionNode) list [n];
                  }
            }
            
            public ExtensionNode this [string id] {
                  get {
                        if (list == null)
                              return null;
                        else {
                              for (int n = list.Count - 1; n >= 0; n--)
                                    if (((ExtensionNode) list [n]).Id == id)
                                          return (ExtensionNode) list [n];
                              return null;
                        }
                  }
            }
            
            public IEnumerator GetEnumerator () 
            {
                  return list.GetEnumerator ();
            }
            
            public int Count {
                  get { return list == null ? 0 : list.Count; }
            }
            
            public void CopyTo (Array array, int index)
            {
                  list.CopyTo (array, index);
            }
      }
}

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