internal OrderByPropertyComparer(bool[] ascending, CultureInfo cultureInfo, bool caseSensitive)
{
_propertyComparers = new ObjectCommandComparer[ascending.Length];
for (int k = 0; k < ascending.Length; k++)
{
_propertyComparers[k] = new ObjectCommandComparer(ascending[k], cultureInfo, caseSensitive);
}
}
/// <summary>
/// </summary>
protected override void ProcessRecord()
{
bool isUnique = true;
if (_lastObject == null)
{
// always write first object, but return nothing
// on "MSH> get-unique"
if (AutomationNull.Value == InputObject)
{
return;
}
}
else if (OnType)
{
isUnique = (InputObject.InternalTypeNames[0] != _lastObject.InternalTypeNames[0]);
}
else if (AsString)
{
string inputString = InputObject.ToString();
if (_lastObjectAsString == null)
{
_lastObjectAsString = _lastObject.ToString();
}
if (string.Equals(
inputString,
_lastObjectAsString,
StringComparison.CurrentCulture))
{
isUnique = false;
}
else
{
_lastObjectAsString = inputString;
}
}
else // compare as objects
{
if (_comparer == null)
{
_comparer = new ObjectCommandComparer(
true, // ascending (doesn't matter)
CultureInfo.CurrentCulture,
true); // case-sensitive
}
isUnique = (_comparer.Compare(InputObject, _lastObject) != 0);
}
if (isUnique)
{
WriteObject(InputObject);
_lastObject = InputObject;
}
}