架构学习（三）作业

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发布于: 2020 年 06 月 24 日
手写一个单例模式
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组合设计模式编写程序请用组合设计模式编写程序，打印输出图 1 的窗口，窗口组件的树结构如图 2 所示，打印输出示例参考图 3。
参考图
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<?php
/**
 * Created by PhpStorm.
 * User: ruicewang
 * Date: 2020/6/24
 * Time: 4:10 PM
 */
interface  IConponent {
    function add(IConponent $conponent);
	function fprint();
}
class Window implements  IConponent {
	private $conponentList = [];
	private $name;
	public function __construct($name) {
		$this->name = $name;
	}
	public function  add(IConponent $conponent) {
        array_push($this->conponentList,$conponent);
    }
	function fprint() {
		echo "print WinForm({$this->name})\n";
		if($this->conponentList){
		    foreach ($this->conponentList as $conponent) {
		        $conponent->fprint();
            }
        }
	}
}
class Picture implements IConponent {
    private $conponentList = [];
    private $name;
    public function __construct($name) {
        $this->name = $name;
    }
    public function  add(IConponent $conponent) {
        array_push($this->conponentList,$conponent);
    }
    function fprint() {
        echo "print Picture({$this->name})\n";
        if($this->conponentList){
            foreach ($this->conponentList as $conponent) {
                $conponent->fprint();
            }
        }
    }
}
class Button implements IConponent {
    private $conponentList = [];
    private $name;
    public function __construct($name) {
        $this->name = $name;
    }
    public function  add(IConponent $conponent) {
        array_push($this->conponentList,$conponent);
    }
    function fprint() {
        echo "print Button({$this->name})\n";
        if($this->conponentList){
            foreach ($this->conponentList as $conponent) {
                $conponent->fprint();
            }
        }
    }
}
class Frame implements IConponent {
    private $conponentList = [];
    private $name;
    public function __construct($name) {
        $this->name = $name;
    }
    public function  add(IConponent $conponent) {
        array_push($this->conponentList,$conponent);
    }
    function fprint() {
        echo "print Frame({$this->name})\n";
        if($this->conponentList){
            foreach ($this->conponentList as $conponent) {
                $conponent->fprint();
            }
        }
    }
}
class Lable implements IConponent {
    private $conponentList = [];
    private $name;
    public function __construct($name) {
        $this->name = $name;
    }
    public function  add(IConponent $conponent) {
        array_push($this->conponentList,$conponent);
    }
    function fprint() {
        echo "print Lable({$this->name})\n";
        if($this->conponentList){
            foreach ($this->conponentList as $conponent) {
                $conponent->fprint();
            }
        }
    }
}
class TextBox implements IConponent {
    private $conponentList = [];
    private $name;
    public function __construct($name) {
        $this->name = $name;
    }
    public function  add(IConponent $conponent) {
        array_push($this->conponentList,$conponent);
    }
    function fprint() {
        echo "print TextBox({$this->name})\n";
        if($this->conponentList){
            foreach ($this->conponentList as $conponent) {
                $conponent->fprint();
            }
        }
    }
}
class PasswordBox implements IConponent {
    private $conponentList = [];
    private $name;
    public function __construct($name) {
        $this->name = $name;
    }
    public function  add(IConponent $conponent) {
        array_push($this->conponentList,$conponent);
    }
    function fprint() {
        echo "print PasswordBox({$this->name})\n";
        if($this->conponentList){
            foreach ($this->conponentList as $conponent) {
                $conponent->fprint();
            }
        }
    }
}
class Checkbox implements IConponent {
    private $conponentList = [];
    private $name;
    public function __construct($name) {
        $this->name = $name;
    }
    public function  add(IConponent $conponent) {
        array_push($this->conponentList,$conponent);
    }
    function fprint() {
        echo "print Checkbox({$this->name})\n";
        if($this->conponentList){
            foreach ($this->conponentList as $conponent) {
                $conponent->fprint();
            }
        }
    }
}
class Linklable implements IConponent {
    private $conponentList = [];
    private $name;
    public function __construct($name) {
        $this->name = $name;
    }
    public function  add(IConponent $conponent) {
        array_push($this->conponentList,$conponent);
    }
    function fprint() {
        echo "print Linklable({$this->name})\n";
        if($this->conponentList){
            foreach ($this->conponentList as $conponent) {
                $conponent->fprint();
            }
        }
    }
}
$windowObject = new Window('WINDOW窗口');
$windowObject->add(new Picture("LOGO图片"));
$windowObject->add(new Button("登录"));
$windowObject->add(new Button("注册"));
$frameObject = new Frame("FRAME1");
$frameObject->add(new Lable('用户名'));
$frameObject->add(new TextBox('文本框'));
$frameObject->add(new Lable('密码'));
$frameObject->add(new PasswordBox('密码框'));
$frameObject->add(new Checkbox('复选框'));
$frameObject->add(new TextBox('记住用户名'));
$frameObject->add(new Linklable('忘记密码'));
$windowObject->add($frameObject);
$windowObject->fprint();
﻿
打印结果
总结：
Compose objects into tree structure to represent part-whole hierarchies.Composite lets client treat individual objects and compositions of objects uniformly.
翻译：将一组对象组织（Compose）成树形结构，以表示一种“部分 - 整体”的层次结构。组合让客户端（在很多设计模式书籍中，“客户端”代指代码的使用者。）可以统一单个对象和组合对象的处理逻辑。
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组合模式的设计思路，与其说是一种设计模式，倒不如说是对业务场景的一种数据结构和算法的抽象。其中，数据可以表示成树这种数据结构，业务需求可以通过在树上的递归遍历算法来实现。组合模式，将一组对象组织成树形结构，将单个对象和组合对象都看做树中的节点，以统一处理逻辑，并且它利用树形结构的特点，递归地处理每个子树，依次简化代码实现。使用组合模式的前提在于，你的业务场景必须能够表示成树形结构。所以，组合模式的应用场景也比较局限，它并不是一种很常用的设计模式。
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