<?php
/**
 * Created by PhpStorm.
 * user: JZ
 * Date: 2019/7/13
 * Time: 13:06
 */

class Document implements JsonSerializable {

    private $id;
    private $title;
    private $pageCount;
    private $createTime;
    private $contentType;
    private $params;

    public function jsonSerialize() {
        $data = [];
        foreach ($this as $key=>$val){
            if ($val !== null) $data[$key] = $val;
        }
        if(sizeof($data) < 1){
            return null;
        }
        return $data;
    }

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

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

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

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

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

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

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

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

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

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

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

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