///<summary>Insert new node</summary>
///<param name="prev">Node inserted before</param>
///<param name="value">Value of new node</param>
///<returns>Returns new inserted node</returns>
private CTNode <T> InsertNewNode(CTNode <T> prev, T value)
{
CTNode <T> newNode = new CTNode <T>(value);
CTNode <T> currentParent = prev;
while (IsBigger(currentParent.Value, value))
{
if (currentParent.Parent == null)
{
break;
}
else
{
currentParent = currentParent.Parent;
}
}
if (IsBigger(currentParent.Value, value))
{
//currentParent is root node
//newNode will be the new root and its left child must be currentParent
newNode.SetLeft(currentParent);
currentParent.SetParent(newNode);
}
else
{
InsertToRight(currentParent, newNode);
}
return(newNode);
}
private void BuildTreeFromArray(T[] array)
{
// choosing algorithm to build tree (today is only one algorithm named 'CTBSift')
CTBSift <T> siftBuildAlgorithm = new CTBSift <T>(compare);
CTBuilder <T> ctBuilder = new CTBuilder <T>(siftBuildAlgorithm);
root = ctBuilder.CreateTree(array);
}
///<summary>
///Insert newNode to parent node as right child and also
///replace parent right child as a left child of newNode
///</summary>
private void InsertToRight(CTNode <T> parent, CTNode <T> newNode)
{
newNode.SetParent(parent);
newNode.SetLeft(parent.Right);
if (parent.Right != null)
{
parent.Right.SetParent(newNode);
}
parent.SetRight(newNode);
}
public override CTNode <T> BuildTree(T[] array)
{
CTNode <T> root = new CTNode <T>(array[0]);
CTNode <T> previous = root;
for (int i = 1; i < array.Length; i++)
{
previous = InsertNewNode(previous, array[i]);
if (previous.Parent == null)
{
root = previous;
}
}
return(root);
}