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// 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.
//
// Copyright (c) 2008 Novell, Inc. (http://www.novell.com)
//
// Authors:
// Chris Toshok (toshok@ximian.com)
// Brian O'Keefe (zer0keefie@gmail.com)
//
using System;
namespace System.ComponentModel {
public struct SortDescription
{
private string sortPropertyName;
private ListSortDirection sortDirection;
private bool isSealed;
public SortDescription (string propertyName, ListSortDirection direction)
{
if(direction != ListSortDirection.Ascending && direction != ListSortDirection.Descending)
throw new InvalidEnumArgumentException("direction", (int)direction, typeof(ListSortDirection));
sortPropertyName = propertyName;
sortDirection = direction;
isSealed = false;
}
public static bool operator!= (SortDescription sd1, SortDescription sd2)
{
return !(sd1 == sd2);
}
public static bool operator== (SortDescription sd1, SortDescription sd2)
{
return sd1.sortDirection == sd2.sortDirection && sd1.sortPropertyName == sd2.sortPropertyName;
}
public ListSortDirection Direction {
get { return sortDirection; }
set {
if(isSealed)
throw new InvalidOperationException("Cannot change Direction once the SortDescription has been sealed.");
if(value != ListSortDirection.Ascending && value != ListSortDirection.Descending)
throw new InvalidEnumArgumentException("direction", (int)value, typeof(ListSortDirection));
sortDirection = value;
}
}
public bool IsSealed {
get { return isSealed; }
}
public string PropertyName {
get { return sortPropertyName; }
set {
if(isSealed)
throw new InvalidOperationException("Cannot change Direction once the SortDescription has been sealed.");
sortPropertyName = value;
}
}
public override bool Equals (object obj)
{
if (!(obj is SortDescription))
return false;
return ((SortDescription)obj) == this;
}
public override int GetHashCode ()
{
if(sortPropertyName == null)
return sortDirection.GetHashCode ();
return sortPropertyName.GetHashCode () ^ sortDirection.GetHashCode ();
}
internal void Seal()
{
isSealed = true;
}
}
}
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