Example #1
0
  // RR rotation
  private void rotateRR() {
    AVLTreeNode Me = this;
    AVLTreeNode Left = this.LeftNode;

    // switch 'Me' and 'Left' and attach 'Me' to the right connector of 'Left'
    if (Me.Parent != null) Me.Parent.updateMyConnector(Me, Left);

    Left.Parent = Me.Parent;
    if (Left.Parent == null) this.tree.root = Left;
    Me.Parent = Left;
    Me.LeftNode = null;

    if (Left.RightNode != null) {
      // we need to drop a node attached to the place where 'Me' is going to be attached
      // so we don't lose it. We're going to attach it to 'Me' instead
      //
      // Before: Element attached to 'Left'
      // Going to be: Element attached to 'Me' which is attached to 'Left'
      // print("[DEBUG] Dropping right node " + Left.RightNode.Name + " caught by " + Me.Name)
      Left.RightNode.Parent = Me;
      Me.LeftNode = Left.RightNode;
    }
    // finally attach 'Me'
    Left.RightNode = Me;
  }
Example #2
0
  // LL rotation (same as for RR but mirrored)
  private void rotateLL() {
    AVLTreeNode Me = this;
    AVLTreeNode Right = this.RightNode;

    if (Me.Parent != null) Me.Parent.updateMyConnector(Me, Right);

    Right.Parent = Me.Parent;
    if (Right.Parent == null) this.tree.root = Right;
    Me.Parent = Right;
    Me.RightNode = null;

    if (Right.LeftNode != null) {
      // print("[DEBUG] Dropping left node " + Right.LeftNode.Name + " caught by " + Me.Name)
      Right.LeftNode.Parent = Me;
      Me.RightNode = Right.LeftNode;
    }
    Right.LeftNode = Me;
  }