private IEnumerable <BinaryNode <T> > Traversal(BinaryNode <T> Node)
{
if (Node != null)
{
if (Node.GetLeft() != null)
{
foreach (BinaryNode <T> LeftNode in Traversal(Node.GetLeft()))
{
yield return(LeftNode);
}
}
yield return(Node);
if (Node.GetRight() != null)
{
foreach (BinaryNode <T> RightNode in Traversal(Node.GetRight()))
{
yield return(RightNode);
}
}
}
else
{
yield return(null);
}
}
private BinaryNode <T> SearchNode <E>(BinaryNode <T> node, Compare <E> compare, E element)
{
if (compare(node.Value, element) == 0)
{
return(node);
}
else
{
if (compare(node.Value, element) > 0)
{
if (node.GetLeft() == null)
{
return(null);
}
else
{
return(SearchNode(node.GetLeft(), compare, element));
}
}
else
{
if (node.GetRight() == null)
{
return(null);
}
else
{
return(SearchNode(node.GetRight(), compare, element));
}
}
}
}
private bool EditElement <E>(BinaryNode <T> node, Compare <E> compare, E element, T Item)
{
if (compare(node.Value, element) == 0)
{
node.Value = Item;
return(true);
}
else
{
if (compare(node.Value, element) > 0)
{
if (node.GetLeft() == null)
{
return(false);
}
else
{
return(EditElement(node.GetLeft(), compare, element, Item));
}
}
else
{
if (node.GetRight() == null)
{
return(false);
}
else
{
return(EditElement(node.GetRight(), compare, element, Item));
}
}
}
}
private bool Eliminate2(BinaryNode <T> node)
{
// left
BinaryNode <T> TempLeft = node.GetPadre().GetLeft();
// right
BinaryNode <T> TempRight = node.GetPadre().GetRight();
BinaryNode <T> actual = node.GetLeft() != null?node.GetLeft() : node.GetRight();
if (TempLeft == node)
{
node.GetPadre().SetLeft(actual);
actual.SetPadre(node.GetPadre());
node.SetRight(null);
node.SetLeft(null);
count--;
return(true);
}
if (TempRight == node)
{
node.GetPadre().SetRight(actual);
/* Eliminando todas las referencias hacia el nodo */
actual.SetPadre(node.GetPadre());
node.SetRight(null);
node.SetLeft(null);
count--;
return(true);
}
return(false);
}
public bool Eliminate(BinaryNode <T> node)
{
bool NodeRight = node.GetRight() != null ? true : false;
bool NodeLeft = node.GetLeft() != null ? true : false;
//If node does not exist.
if (node == null)
{
return(false);
}
if (!NodeRight && !NodeLeft)
{
return(Eliminate1(node));
}
if (NodeRight && !NodeLeft)
{
return(Eliminate2(node));
}
if (!NodeRight && NodeLeft)
{
return(Eliminate2(node));
}
if (NodeRight && NodeLeft)
{
return(Eliminate3(node));
}
return(false);
}
private BinaryNode <T> RotateRight(BinaryNode <T> binaryNode)
{
BinaryNode <T> left = binaryNode.GetLeft();
BinaryNode <T> leftRight = left.GetRight();
BinaryNode <T> parent = binaryNode.GetPadre();
left.SetPadre(parent);
left.SetRight(binaryNode);
binaryNode.SetLeft(leftRight);
binaryNode.SetPadre(left);
if (leftRight != null)
{
leftRight.SetPadre(binaryNode);
}
if (binaryNode == this.root)
{
this.root = left;
}
else if (parent.GetLeft() == binaryNode)
{
parent.SetLeft(left);
}
else
{
parent.SetRight(left);
}
left.Balance--;
binaryNode.Balance = -left.Balance;
return(left);
}
public bool Eliminate(BinaryNode <T> binaryNode)
{
bool NodeRight = binaryNode.GetRight() != null ? true : false;
bool NodeLeft = binaryNode.GetLeft() != null ? true : false;
//If note is empty.
if (binaryNode == null)
{
return(false);
}
if (!NodeRight && !NodeLeft)
{
return(Delete1(binaryNode));
}
if (NodeRight && !NodeLeft)
{
return(Delete2(binaryNode));
}
if (!NodeRight && NodeLeft)
{
return(Delete2(binaryNode));
}
if (NodeRight && NodeLeft)
{
return(Delete3(binaryNode));
}
return(false);
}
private BinaryNode <T> RotateLeft(BinaryNode <T> binaryNode)
{
BinaryNode <T> right = binaryNode.GetRight();
BinaryNode <T> rightLeft = right.GetLeft();
BinaryNode <T> parent = binaryNode.GetPadre();
right.SetPadre(parent);
right.SetLeft(binaryNode);
binaryNode.SetRight(rightLeft);
binaryNode.SetPadre(right);
if (rightLeft != null)
{
rightLeft.SetPadre(binaryNode);
}
if (binaryNode == this.root)
{
this.root = right;
}
else if (parent.GetRight() == binaryNode)
{
parent.SetRight(right);
}
else
{
parent.SetLeft(right);
}
right.Balance++;
binaryNode.Balance = -right.Balance;
return(right);
}
private BinaryNode <T> RotateLeftRight(BinaryNode <T> binaryNode)
{
BinaryNode <T> left = binaryNode.GetLeft();
BinaryNode <T> leftRight = left.GetRight();
BinaryNode <T> parent = binaryNode.GetPadre();
BinaryNode <T> leftRightRight = leftRight.GetRight();
BinaryNode <T> leftRightLeft = leftRight.GetLeft();
leftRight.SetPadre(parent);
binaryNode.SetLeft(leftRightRight);
left.SetRight(leftRightLeft);
leftRight.SetLeft(left);
leftRight.SetRight(binaryNode);
left.SetPadre(leftRight);
binaryNode.SetPadre(leftRight);
if (leftRightRight != null)
{
leftRightRight.SetPadre(binaryNode);
}
if (leftRightLeft != null)
{
leftRightLeft.SetPadre(left);
}
if (binaryNode == this.root)
{
SetRoot(leftRight);
}
else if (parent.GetLeft() == binaryNode)
{
parent.SetLeft(leftRight);
}
else
{
parent.SetRight(leftRight);
}
if (leftRight.Balance == -1)
{
binaryNode.Balance = 0;
left.Balance = 1;
}
else if (leftRight.Balance == 0)
{
binaryNode.Balance = 0;
left.Balance = 0;
}
else
{
binaryNode.Balance = -1;
left.Balance = 0;
}
leftRight.Balance = 0;
return(leftRight);
}
private BinaryNode <T> RotateRightLeft(BinaryNode <T> binaryNode)
{
BinaryNode <T> right = binaryNode.GetRight();
BinaryNode <T> rightLeft = right.GetLeft();
BinaryNode <T> parent = binaryNode.GetPadre();
BinaryNode <T> rightLeftLeft = rightLeft.GetLeft();
BinaryNode <T> rightLeftRight = rightLeft.GetRight();
rightLeft.SetPadre(parent);
binaryNode.SetRight(rightLeftLeft);
right.SetLeft(rightLeftRight);
rightLeft.SetRight(right);
rightLeft.SetLeft(binaryNode);
right.SetPadre(rightLeft);
binaryNode.SetPadre(rightLeft);
if (rightLeftLeft != null)
{
rightLeftLeft.SetPadre(binaryNode);
}
if (rightLeftRight != null)
{
rightLeftRight.SetPadre(right);
}
if (binaryNode == this.root)
{
SetRoot(rightLeft);
}
else if (parent.GetRight() == binaryNode)
{
parent.SetRight(rightLeft);
}
else
{
parent.SetLeft(rightLeft);
}
if (rightLeft.Balance == 1)
{
binaryNode.Balance = 0;
right.Balance = -1;
}
else if (rightLeft.Balance == 0)
{
binaryNode.Balance = 0;
right.Balance = 0;
}
else
{
binaryNode.Balance = 1;
right.Balance = 0;
}
rightLeft.Balance = 0;
return(rightLeft);
}
private void PostOrder(BinaryNode <T> node, ref List <T> list)
{
if (node != null)
{
PostOrder(node.GetLeft(), ref list);
PostOrder(node.GetRight(), ref list);
list.Add(node.Value);
}
}
private void InOrden(BinaryNode <T> node, ref List <T> list)
{
if (node != null)
{
InOrden(node.GetLeft(), ref list);
list.Add(node.Value);
InOrden(node.GetRight(), ref list);
}
}
private void PreOrder(BinaryNode <T> binaryNode, ref List <T> list)
{
if (binaryNode != null)
{
list.Add(binaryNode.Value);
PreOrder(binaryNode.GetLeft(), ref list);
PreOrder(binaryNode.GetRight(), ref list);
}
}
private void Add(BinaryNode <T> value, BinaryNode <T> root)
{
if (root == null)
{
//Insert first element.
this.myRoot(value);
this.root.SetPadre(null);
count++;
}
else
{
if (value.Value.CompareTo(root.Value) == 1)
{
if (root.GetRight() == null)
{
root.SetRight(value);
root.GetRight().SetPadre(root);
count++;
}
else
{
Add(value, root.GetRight());
}
}
else
{
if (root.GetLeft() == null)
{
root.SetLeft(value);
root.GetLeft().SetPadre(root);
count++;
}
else
{
Add(value, root.GetLeft());
}
}
}
}
private bool Delete3(BinaryNode <T> binaryNode)
{
BinaryNode <T> binaryNodeMoreLeft = RouteLeft(binaryNode.GetRight());
if (binaryNodeMoreLeft != null)
{
binaryNode.Value = binaryNodeMoreLeft.Value;
Eliminate(binaryNodeMoreLeft);
return(true);
}
return(false);
}
private bool Eliminate3(BinaryNode <T> node)
{
BinaryNode <T> LeftNode = SearchLeft(node.GetRight());
if (LeftNode != null)
{
node.Value = LeftNode.Value;
Eliminate(LeftNode);
return(true);
}
return(false);
}
private void InsertBalance(BinaryNode <T> binaryNode, int balance)
{
while (binaryNode != null)
{
balance = (binaryNode.Balance += balance);
if (balance == 0)
{
return;
}
else if (balance == 2)
{
if (binaryNode.GetLeft().Balance == 1)
{
RotateRight(binaryNode);
}
else
{
RotateLeftRight(binaryNode);
}
return;
}
else if (balance == -2)
{
if (binaryNode.GetRight().Balance == -1)
{
RotateLeft(binaryNode);
}
else
{
RotateRightLeft(binaryNode);
}
return;
}
BinaryNode <T> parent = binaryNode.GetPadre();
if (parent != null)
{
balance = parent.GetLeft() == binaryNode ? 1 : -1;
}
binaryNode = parent;
}
}
private void Add(BinaryNode <T> newElement, BinaryNode <T> root)
{
if (root == null)
{
this.SetRoot(newElement);
count++;
this.root.SetPadre(null);
}
else
{
BinaryNode <T> binaryNode = this.root;
while (binaryNode != null)
{
int compare = newElement.Value.CompareTo(binaryNode.Value);
if (compare < 0)
{
BinaryNode <T> left = binaryNode.GetLeft();
if (left == null)
{
binaryNode.SetLeft(newElement);
binaryNode.GetLeft().SetPadre(binaryNode);
count++;
InsertBalance(binaryNode, 1);
return;
}
else
{
binaryNode = left;
}
}
else
{
if (compare > 0)
{
BinaryNode <T> right = binaryNode.GetRight();
if (right == null)
{
binaryNode.SetRight(newElement);
binaryNode.GetRight().SetPadre(binaryNode);
count++;
InsertBalance(binaryNode, -1);
return;
}
else
{
binaryNode = right;
}
}
else
{
binaryNode.Value = newElement.Value;
return;
}
}
}
}
}
private bool Delete2(BinaryNode <T> binaryNode)
{
BinaryNode <T> TempLeft = binaryNode.GetPadre().GetLeft();
BinaryNode <T> TempRight = binaryNode.GetPadre().GetRight();
BinaryNode <T> current = binaryNode.GetLeft() != null?binaryNode.GetLeft() : binaryNode.GetRight();
if (TempLeft == binaryNode)
{
binaryNode.GetPadre().SetLeft(current);
current.SetPadre(binaryNode.GetPadre());
binaryNode.SetRight(null);
binaryNode.SetLeft(null);
count--;
return(true);
}
if (TempRight == binaryNode)
{
binaryNode.GetPadre().SetRight(current);
current.SetPadre(binaryNode.GetPadre());
binaryNode.SetRight(null);
binaryNode.SetLeft(null);
count--;
return(true);
}
return(false);
}