<?php
/**
 * User:@DennisRitche
 */
class  Node
{

    /**
     * @var  $value mixed
     * **/
    private $value = null;
    /**
     * @var  $left_node Node
     * **/
    private $left_node = null;
    /**
     * @var  $right_node Node
     * **/
    private $right_node = null;

    /**
     * @var  $parent_node Node
     * **/
    private $parent_node = null;


    /**
     * Node constructor.
     * @param $value mixed
     */
    public function __construct($value)
    {
        $this->value = $value;
    }

    /**
     * @param $value mixed
     * @return  self
     */
    public static function create($value)
    {
        return new static($value);
    }

    /**
     * @return Node
     */
    public function getLeftNode()
    {
        return $this->left_node;
    }

    /**
     * @param Node $left_node
     */
    public function setLeftNode($left_node)
    {
        $this->left_node = $left_node;
    }

    /**
     * @return Node
     */
    public function getRightNode()
    {
        return $this->right_node;
    }

    /**
     * @param Node $right_node
     */
    public function setRightNode($right_node)
    {
        $this->right_node = $right_node;
    }

    /**
     * @return mixed
     */
    public function getValue()
    {
        return $this->value;
    }

    /**
     * @param mixed $value
     */
    public function setValue($value)
    {
        $this->value = $value;
    }

    /**
     * @return Node
     */
    public function getParentNode()
    {
        return $this->parent_node;
    }

    /**
     * @param Node $parent_node
     */
    public function setParentNode($parent_node)
    {
        $this->parent_node = $parent_node;
    }
}