<?php
 
/**
 * 企业应用架构 数据源架构模式之活动记录 2010-10-17 sz
 * @author phppan.p#gmail.com  http://www.phppan.com
 * 哥学社成员（http://www.blog-brother.com/）
 * @package architecture
 */
 
/**
 * 定单类
 */
class Order {
 
    /**
     *  定单ID
     * @var <type>
     */
    private $_order_id;
 
    /**
     * 客户ID
     * @var <type>
     */
    private $_customer_id;
 
    /**
     * 定单金额
     * @var <type>
     */
    private $_amount;
 
    public function __construct($order_id, $customer_id, $amount) {
        $this->_order_id = $order_id;
        $this->_customer_id = $customer_id;
        $this->_amount = $amount;
    }
 
    /**
     * 实例的删除操作
     */
    public function delete() {
        $sql = "DELETE FROM Order SET WHERE order_id = " . $this->_order_id . " AND customer_id = "  . $this->_customer_id;
        return DB::query($sql);
    }
 
    /**
     * 实例的更新操作
     */
    public function update() {
    }
 
    /**
     * 插入操作
     */
    public function insert() {
    }
 
    public static function load($rs) {
        return new Order($rs['order_id'] ? $rs['order_id'] : NULL, $rs['customer_id'], $rs['amount'] ? $rs['amount'] : 0);
    }
 
}
 
class Customer {
 
    private $_name;
    private $_customer_id;
 
    public function __construct($customer_id, $name) {
        $this->_customer_id = $customer_id;
        $this->_name = $name;
    }
 
    /**
     * 用户删除定单操作 此实例方法包含了业务逻辑
     * 通过调用定单实例实现
     * 假设此处是对应的删除操作（实际中可能是一种以某字段来标记的假删除操作）
     */
    public function deleteOrder($order_id) {
        $order = Order::load(array('order_id' => $order_id, 'customer_id' => $this->_customer_id));
        return $order->delete();
    }
 
    /**
     * 实例的更新操作
     */
    public function update() {
    }
 
    /**
     * 入口类自身拥有插入操作
     */
    public function insert() {
    }
 
    public static function load($rs) {
        /* 此处可加上缓存 */
        return new Customer($rs['customer_id'] ? $rs['customer_id'] : NULL, $rs['name']);
    }
 
    /**
     * 根据客户ID 查找
     * @param integer $id   客户ID
     * @return  Customer 客户对象
     */
    public static function find($id) {
        return CustomerFinder::find($id);
    }
 
}
 
/**
 * 人员查找类
 */
class CustomerFinder {
 
    public static function find($id) {
        $sql = "SELECT * FROM person WHERE customer_id = " . $id;
        $rs = DB::query($sql);
 
        return Customer::load($rs);
    }
}
 
class DB {
 
    /**
     * 这只是一个执行SQL的演示方法
     * @param string $sql   需要执行的SQL
     */
    public static function query($sql) {
        echo "执行SQL: ", $sql, " <br />";
 
         if (strpos($sql, 'SELECT') !== FALSE) { //  示例，对于select查询返回查询结果
            return array('customer_id' => 1, 'name' => 'Martin');
        }
    }
 
}
 
/**
 * 客户端调用
 */
class Client {
 
    /**
     * Main program.
     */
    public static function main() {
 
 
        header("Content-type:text/html; charset=utf-8");
 
        /* 加载客户ID为1的客户信息 */
        $customer = Customer::find(1);
 
        /* 假设用户拥有的定单id为 9527*/
        $customer->deleteOrder(9527);
    }
 
}
 
Client::main();
?>