<?php
 
/**
 * 企业应用架构 数据源架构模式之行数据入口 2010-09-27 sz
 * @author phppan.p#gmail.com  http://www.phppan.com
 * 哥学社成员（http://www.blog-brother.com/）
 * @package architecture
 */
class PersonGateway {
 
    private $_name;
    private $_id;
    private $_birthday;
 
    public function __construct($id, $name, $birthday) {
        $this->setId($id);
        $this->setName($name);
        $this->setBirthday($birthday);
    }
 
    public function getName() {
        return $this->_name;
    }
 
    public function setName($name) {
        $this->_name = $name;
    }
 
    public function getId() {
        return $this->_id;
    }
 
    public function setId($id) {
        $this->_id = $id;
    }
 
    public function getBirthday() {
        return $this->_birthday;
    }
 
    public function setBirthday($birthday) {
        $this->_birthday = $birthday;
    }
 
    /**
     * 入口类自身拥有更新操作
     */
    public function update() {
        $data = array('id' => $this->_id, 'name' => $this->_name, 'birthday' => $this->_birthday);
 
        $sql = "UPDATE person SET ";
        foreach ($data as $field => $value) {
            $sql .= "`" . $field . "` = '" . $value . "',";
        }
        $sql = substr($sql, 0, -1);
 
        $sql .= " WHERE id = " . $this->_id;
 
        return DB::query($sql);
    }
 
    /**
     * 入口类自身拥有插入操作
     */
    public function insert() {
        $data = array('name' => $this->_name, 'birthday' => $this->_birthday);
 
        $sql = "INSERT INTO person ";
        $sql .= "(`" . implode("`,`", array_keys($data)) . "`)";
        $sql .= " VALUES('" . implode("','", array_values($data)) . "')";
 
        return DB::query($sql);
    }
 
    public static function load($rs) {
        /* 此处可加上缓存 */
        return new PersonGateway($rs['id'] ? $rs['id'] : NULL, $rs['name'], $rs['birthday']);
    }
 
}
 
/**
 * 人员查找类
 */
class PersonFinder {
 
    public function find($id) {
        $sql = "SELECT * FROM person WHERE id = " . $id;
        $rs = DB::query($sql);
 
        return PersonGateway::load($rs);
    }
 
    public function findAll() {
        $sql = "SELECT * FROM person";
        $rs = DB::query($sql);
 
        $result = array();
        if (is_array($rs)) {
            foreach ($rs as $row) {
                $result[] = PersonGateway::load($row);
            }
        }
 
        return $result;
    }
 
}
 
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('id' => 1, 'name' => 'Martin', 'birthday' => '2010-09-15');
        }
    }
 
}
 
/**
 * 客户端调用
 */
class Client {
 
    /**
     * Main program.
     */
    public static function main() {
 
 
        header("Content-type:text/html; charset=utf-8");
 
        /* 写入示例 */
        $data = array('name' => 'Martin', 'birthday' => '2010-09-15');
        $person = PersonGateway::load($data);
        $person->insert();
 
        /* 更新示例 */
        $data = array('id' => 1, 'name' => 'Martin', 'birthday' => '2010-09-15');
        $person = PersonGateway::load($data);
        $person->setName('Phppan');
        $person->update();
 
        /* 查询示例 */
        $finder = new PersonFinder();
        $person = $finder->find(1);
        echo $person->getName();
 
    }
 
}
 
Client::main();
?>