/source/library/Interlace/DatabaseManagement/DatabaseVersionEdge.cs

#region Using Directives and Copyright Notice



// Copyright (c) 2006-2010, Bit Plantation (ABN 80 332 904 638)

// All rights reserved.

// 

// Redistribution and use in source and binary forms, with or without

// modification, are permitted provided that the following conditions are met:

//     * Redistributions of source code must retain the above copyright

//       notice, this list of conditions and the following disclaimer.

//     * Redistributions in binary form must reproduce the above copyright

//       notice, this list of conditions and the following disclaimer in the

//       documentation and/or other materials provided with the distribution.

//     * Neither the name of the Computer Consultancy Pty Ltd nor the

//       names of its contributors may be used to endorse or promote products

//       derived from this software without specific prior written permission.

// 

// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" 

// AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 

// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 

// ARE DISCLAIMED. IN NO EVENT SHALL COMPUTER CONSULTANCY PTY LTD BE LIABLE 

// FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 

// DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR 

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// DAMAGE.



using System;



#endregion



namespace Interlace.DatabaseManagement

{

	public class DatabaseVersionEdge

	{

		DatabaseSchemaUpgrade _upgrade;

		bool _unexplored;

		DatabaseVersionEdge _previousEdge;



		public DatabaseVersionEdge(DatabaseSchemaUpgrade upgrade)

		{

			_upgrade = upgrade;

			_unexplored = true;

			_previousEdge = null;

		}



		public override bool Equals(object obj)

		{

			if (!(obj is DatabaseVersionEdge)) return false;



			DatabaseVersionEdge rhs = obj as DatabaseVersionEdge;



			return FromVersion == rhs.FromVersion && ToVersion == rhs.ToVersion;

		}



		public override int GetHashCode()

		{

			return FromVersion.GetHashCode() ^ ToVersion.GetHashCode();

		}



		public string FromVersion { get { return _upgrade.fromversion; } }

		public string ToVersion { get { return _upgrade.toversion; } }

		public string[] Commands { get { return _upgrade.command; } }



		public DatabaseVersionEdge PreviousEdge

		{

			get { return _previousEdge; }

			set { _previousEdge = value; }

		}



		public bool Unexplored

		{

			get { return _unexplored; }

			set { _unexplored = value; }

		}

	}

}