public AscOrDescHelper <T> ProcessNextValue(T next)
{
switch (state)
{
case SortedState.NoValues:
state = SortedState.Undecided;
break;
case SortedState.Undecided:
case SortedState.Ascending:
case SortedState.Descending:
int cmp = next.CompareTo(lastValue);
switch (state)
{
case SortedState.Undecided:
if (cmp > 0)
{
state = SortedState.Ascending;
}
else if (cmp < 0)
{
state = SortedState.Descending;
}
else
{
uniqueValues = false;
}
break;
case SortedState.Ascending:
if (cmp < 0)
{
state = SortedState.Mixture;
}
else if (cmp == 0)
{
// Not unique
uniqueValues = false;
}
break;
case SortedState.Descending:
if (cmp > 0)
{
state = SortedState.Mixture;
}
else if (cmp == 0)
{
// Not unique
uniqueValues = false;
}
break;
}
break;
}
lastValue = next;
return(this);
}
public AscOrDescHelper()
{
state = SortedState.NoValues;
uniqueValues = true; // tentative assumption
}
