public void Step(Step step)
{
if (Children.Count != 0)
{
foreach (Group other in Children)
{
other.Step(step);
}
return;
}
if (Items.Count <= 1)
{
return;
}
if ((Items.Count == 2 && (step.IsFlat ?? true)) || (step.IsFlat ?? false))
{
Items.Sort(step);
return;
}
string stepName = step.GetType().Name;
Group group = new Group(stepName, new List <T>()
{
Items[0]
});
Children.Add(group);
for (int i = 1; i < Items.Count; i++)
{
T item = Items[i];
if (step.Any(group.Items, item))
{
Group groupPrev = group;
group = null;
if (Children.Count > 1)
{
foreach (Group otherGroup in Children)
{
if (otherGroup == groupPrev)
{
continue;
}
if (step.Any(otherGroup.Items, item) ||
step.Any(otherGroup.NonMatching, item))
{
continue;
}
group = otherGroup;
break;
}
}
if (group == null)
{
group = new Group(stepName);
Children.Add(group);
group.NonMatching.Add(groupPrev);
groupPrev.NonMatching.Add(group);
}
}
group.Items.Add(item);
}
if (Children.Count == 1)
{
Children.Clear();
return;
}
Children.Sort(step.ForGroup);
}