private void removeThisFirstLevelChildFromSubtree(Node node) throws NodeDoesNotExistException {
if (node.getPosition().equals(Constants.POSITION.RIGHT.toString())
&& this.isChildAlreadyExists(node, this.getRight())) {
this.getRight().remove(node.getId());
} else if (node.getPosition().equals(Constants.POSITION.LEFT.toString())
&& this.isChildAlreadyExists(node, this.getLeft())) {
this.getLeft().remove(node.getId());
} else throw new NodeDoesNotExistException();
}
private void addThisFirstLevelChildToSubTree(Node node) {
if (node.getPosition().equals(Constants.POSITION.RIGHT.toString())) {
ArrayList<String> rightSubTree = this.getRight();
if (this.isChildAlreadyExists(node, rightSubTree)) rightSubTree.remove(node.getId());
rightSubTree.add(rightSubTree.size(), node.getId());
}
if (node.getPosition().equals(Constants.POSITION.LEFT.toString())) {
ArrayList<String> leftSubTree = this.getLeft();
if (this.isChildAlreadyExists(node, leftSubTree)) leftSubTree.remove(node.getId());
leftSubTree.add(leftSubTree.size(), node.getId());
}
}