log4net/Core/LevelCollection.cs

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#region Copyright & License
//
// Copyright 2001-2005 The Apache Software Foundation
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
//
#endregion

using System;
using System.Collections;

namespace log4net.Core
{
	/// <summary>
	/// A strongly-typed collection of <see cref="Level"/> objects.
	/// </summary>
	/// <author>Nicko Cadell</author>
	public class LevelCollection : ICollection, IList, IEnumerable, ICloneable
	{
		#region Interfaces

		/// <summary>
		/// Supports type-safe iteration over a <see cref="LevelCollection"/>.
		/// </summary>
		public interface ILevelCollectionEnumerator
		{
			/// <summary>
			/// Gets the current element in the collection.
			/// </summary>
			Level Current { get; }

			/// <summary>
			/// Advances the enumerator to the next element in the collection.
			/// </summary>
			/// <returns>
			/// <c>true</c> if the enumerator was successfully advanced to the next element; 
			/// <c>false</c> if the enumerator has passed the end of the collection.
			/// </returns>
			/// <exception cref="InvalidOperationException">
			/// The collection was modified after the enumerator was created.
			/// </exception>
			bool MoveNext();

			/// <summary>
			/// Sets the enumerator to its initial position, before the first element in the collection.
			/// </summary>
			void Reset();
		}

		#endregion