<?php
/**
 * Created by JetBrains PhpStorm.
 * User: Administrator
 * Date: 16-9-23
 * Time: 上午11:42
 * To change this template use File | Settings | File Templates.
 */
class Service_Precaution
{
    private static $_model = NULL;

    /**
     * 获取Table_Precaution对象
     *
     * @return object Table_Precaution
     */
    private static function getModelInstance() {
        if (is_null(self::$_model)) {
            self::$_model = new Table_Precaution();
        }

        return self::$_model;
    }

    /**
     * @see Table_Precaution::insert()
     */
    public static function insert($data) {
        $model = self::getModelInstance();

        return $model->insert($data);
    }

    /**
     * @see Table_Precaution::update()
     */
    public static function update($data, $value, $key = 'precaution_id') {
        $model = self::getModelInstance();

        return $model->update($data, $value, $key);
    }

    /**
     * @see Table_Precaution::delete()
     */
    public static function delete($value, $key = 'precaution_id') {
        $model = self::getModelInstance();

        return $model->delete($value, $key);
    }

    /**
     * @see Table_Precaution::getByField()
     */
    public static function getByField($value, $key = 'precaution_id') {
        $model = self::getModelInstance();

        return $model->getByField($value, $key);
    }
}