public int CompareResources(IResource r1, IResource r2)
{
int propEquals = 0;
UserOrderSortSettings ss = _sortsettings;
for (int i = 0; i < _sortsettings.SortProps.Length; i++)
{
// Compare against the user sort order (if that should be done before this step)
if ((_hashUserOrder != null) &&
(ss != null) &&
(ss.ApplyUserOrderBefore == i) &&
((propEquals = -_hashUserOrder.BucketComparer(r1.OriginalId, r2.OriginalId)) != 0))
{
return(propEquals * (ss.UserOrderSortDirection ? 1 : -1));
}
// Compare the current pair of properties
int propId = _sortsettings.SortProps[i];
if (propId == ResourceProps.Type)
{
propEquals = r1.Type.CompareTo(r2.Type);
}
else if (propId == ResourceProps.DisplayName)
{
propEquals = String.Compare(r1.DisplayName, r2.DisplayName, true, CultureInfo.CurrentCulture);
}
else if (propId == ResourceProps.Id)
{
propEquals = r1.Id - r2.Id;
}
else if (_propTypes[i] == PropDataType.Link)
{
propEquals = r1.GetPropText(propId).CompareTo(r2.GetPropText(propId));
}
else
{ // Compare the property values, checking for the Null case also
IComparable cp;
object prop1 = r1.GetProp(propId);
object prop2 = r2.GetProp(propId);
if (prop1 == null)
{
propEquals = prop2 == null ? 0 : -1;
}
else if (prop2 == null)
{
propEquals = 1;
}
else if ((cp = prop1 as IComparable) != null)
{
propEquals = cp.CompareTo(prop2);
}
}
if (propEquals != 0)
{
return(propEquals * (_sortsettings.SortDirections[i] ? 1 : -1));
}
}
// If all the properties didn't rule out the sort order, check if the user order should be applied after all of them
if ((_hashUserOrder != null) &&
(ss != null) &&
((ss.ApplyUserOrderBefore < 0) || (ss.ApplyUserOrderBefore >= _sortsettings.SortProps.Length)) &&
((propEquals = -_hashUserOrder.BucketComparer(r1.OriginalId, r2.OriginalId)) != 0))
{
return(propEquals * (ss.UserOrderSortDirection ? 1 : -1));
}
return(0);
}
