组合模式 - 设计模式 - PHP版

<?php
/*
* 组合模式
*
* 参考：http://www.cnblogs.com/praglody/p/6783317.html
*
*/
/**
* 组合模式抽象基类
*/
abstract class CompanyBase {
//节点名称
protected $name;
public function __construct($name) {
$this->name = $name;
}
public function getName() {
return $this->name;
}
//增加节点
abstract function add(CompanyBase $c);
//删除节点
abstract function remove(CompanyBase $c);
//输出节点信息
abstract function show($deep);
//节点职责
abstract function work($deep);
}
/**
* 公司类
*/
class Company extends CompanyBase {
protected $item = [];
public function add(CompanyBase $c) {
$nodeName = $c->getName();
if (!isset($this->item[$nodeName])) {
$this->item[$nodeName] = $c;
} else {
throw new Exception("该节点已存在,节点名称：" . $nodeName);
}
}
public function remove(CompanyBase $c) {
$nodeName = $c->getName();
if (isset($this->item[$nodeName])) {
unset($this->item[$nodeName]);
} else {
throw new Exception("该节点不存在,节点名称：" . $nodeName);
}
}
public function show($deep = 0) {
echo str_repeat("-", $deep) . $this->name;
echo "<br>";
foreach ($this->item as $value) {
$value->show($deep + 4);
}
}
public function work($deep = 0) {
foreach ($this->item as $value) {
echo str_repeat(" ", $deep) . "[{$this->name}]<br>";
$value->work($deep + 2);
}
}
}
/**
* 人力资源部门
*/
class HumanResources extends CompanyBase {
public function add(CompanyBase $c) {
throw new Exception("该节点下不能增加节点");
}
public function remove(CompanyBase $c) {
throw new Exception("该节点下无子节点");
}
public function show($deep = 0) {
echo str_repeat("-", $deep) . $this->name;
echo "<br>";
}
public function work($deep = 0) {
echo str_repeat(" ", $deep) . "人力资源部门的工作是为公司招聘人才";
echo "<br>";
}
}
/**
* 商务部门
*/
class Commerce extends CompanyBase {
public function add(CompanyBase $c) {
throw new Exception("该节点下不能增加节点");
}
public function remove(CompanyBase $c) {
throw new Exception("该节点下无子节点");
}
public function show($deep = 0) {
echo str_repeat("-", $deep) . $this->name;
echo "<br>";
}
public function work($deep = 0) {
echo str_repeat(" ", $deep) . "商务部门的工作是为公司赚取利润";
echo "<br>";
}
}
//-------------------------测试代码------------------------
$c = new Company("北京某科技公司");
$h = new HumanResources("人力资源部门");
$com = new Commerce("商务部门");
$c->add($h);
$c->add($com);
//天津分公司
//为了偷懒，分公司的部门直接copy母公司的
$c1 = new Company("天津分公司");
$c1->add($h);
$c1->add($com);
$c->add($c1);
//武汉分公司
$c2 = new Company("武汉分公司");
$c2->add($h);
$c2->add($com);
$c->add($c2);
//使用公司功能
$c->show();
$c->work();