Doctrine 2: League entity

<?php
namespace Entities;

/**
 * @Entity
 * @Table(name="league")
 */
class League {
    /**
     * @Id
     * @Column(type="integer", nullable=false)
     * @GeneratedValue(strategy="AUTO")
     */
    protected $id;

    /**
     * @Column(type="integer", nullable=false)
     */
    protected $parent_id;

    /**
     * @Column(type="string", length="255", nullable=false)
     */
    protected $title;

    /**
     * @Column(type="string", length="255", nullable=true)
     */
    protected $icon;

    /**
     * @Column(type="integer", length="2", nullable=false)
     */
    protected $order;

    /**
     * @Column(type="datetime", nullable=false)
     */
    protected $cdate;

    /**
     * @Column(type="datetime", nullable=false)
     */
    protected $mdate;

    /**
     * @OneToOne(targetEntity="Clubs", mappedBy="league_id")
     */
    protected $club;

    /**
     * @OneToOne(targetEntity="Matches", mappedBy="league_id")
     */
    protected $match;


    // GETTERS & SETTERS
    public function setParent_id($parent_id) {
        $this->parent_id = $parent_id;
    }

    public function getParent_id() {
        return $this->parent_id;
    }

    public function setTitle($title) {
        $this->title = (string)$title;
    }

    public function getTitle() {
        return $this->title;
    }

    public function setIcon($icon) {
        $this->icon = (string)$icon;
    }

    public function getIcon() {
        return $this->icon;
    }

    public function setOrder($order) {
        $this->order = $order;
    }

    public function getOrder() {
        return $this->order;
    }

    public function setCdate($date) {
        $this->cdate = $date;
    }

    public function getCdate() {
        return $this->cdate;
    }

    public function setMdate($date) {
        $this->mdate = $date;
    }

    public function getMdate() {
        return $this->mdate;
    }
}