/**
* Joins two trees
*
* @param childNode Child node
* @param parentNode Parent node
* @param side Side of the parent node to join child node to
*/
protected void joinTrees(TreeNode<K, V> childNode, TreeNode<K, V> parentNode, Side side) {
if (parentNode == null) {
root = childNode;
} else {
switch (side) {
case RIGHT:
parentNode.setRightNode(childNode);
break;
case LEFT:
parentNode.setLeftNode(childNode);
break;
}
}
}