private Node <T> BalanceOut(Node <T> node, AddedSide addedSide, AddedSide childAddedSide)
{
if (Math.Abs(Height(node.RightNode) - Height(node.LeftNode)) > 1)
{
if (addedSide == AddedSide.Left && childAddedSide == AddedSide.Left)
{
return(RotateWithLeftChild(node));
}
else if (addedSide == AddedSide.Left && childAddedSide == AddedSide.Right)
{
return(DoubleRotateWithLeftChild(node));
}
else if (addedSide == AddedSide.Right && childAddedSide == AddedSide.Left)
{
return(DoubleRotateWithRightChild(node));
}
else if (addedSide == AddedSide.Right && childAddedSide == AddedSide.Right)
{
return(RotateWithRightChild(node));
}
else
{
throw new Exception();
}
}
else
{
return(node);
}
}
public Node <T> Add(T data, Node <T> node, out AddedSide childAddedSide)
{
childAddedSide = default(AddedSide);
if (node == null)
{
return(new Node <T>(data));
}
var compared = data.CompareTo(node.Element);
var addedSide = default(AddedSide);
if (compared < 0)
{
node.LeftNode = Add(data, node.LeftNode, out childAddedSide);
addedSide = AddedSide.Left;
}
else if (compared > 0)
{
node.RightNode = Add(data, node.RightNode, out childAddedSide);
addedSide = AddedSide.Right;
}
else
{
throw new DuplicateItemException(data);
}
var retNode = BalanceOut(node, addedSide, childAddedSide);
childAddedSide = addedSide;
return(retNode);
}
