detectSoundlevel-spike/sourceCode/trunk/Code/CoreAudioTests/Common/PartComparer.cs

// -----------------------------------------
// SoundScribe (TM) and related software.
// 
// Copyright (C) 2007-2011 Vannatech
// http://www.vannatech.com
// All rights reserved.
// 
// This source code is subject to the MIT License.
// http://www.opensource.org/licenses/mit-license.php
//
// 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.Generic;
using System.Linq;
using System.Runtime.InteropServices;
using System.Text;
using Microsoft.VisualStudio.TestTools.UnitTesting;
using Vannatech.CoreAudio.Constants;
using Vannatech.CoreAudio.Enumerations;
using Vannatech.CoreAudio.Externals;
using Vannatech.CoreAudio.Interfaces;

namespace CoreAudioTests.Common
{
	/// <summary>
	/// Used for comparing IPart instances.
	/// </summary>
	public class PartComparer : IEqualityComparer<IPart>
	{

		public bool Equals(IPart x, IPart y)
		{
			if (x == null || y == null) return false;

			string xId, yId;
			x.GetGlobalId(out xId);
			y.GetGlobalId(out yId);

			return (xId == yId);
		}

		public int GetHashCode(IPart obj)
		{
			if (obj == null) return 0;

			string partId;
			obj.GetGlobalId(out partId);

			return partId.GetHashCode();
		}
	}
}