GoF Compositeパターン

Composite.php

<?php
abstract class OrganizationEntry{
    private $code;
    private $name;
    
    public function __construct($code, $name){
        $this->code = $code;
        $this->name = $name;
    }
    
    public function getCode(){
        return $this->code;
    }
    
    public function getName(){
        return $this->name;
    }
    
    //必ず子クラスでこのメソッドを実装要
    public abstract function add(OrganizationEntry $entry);
    
    public function dump(){
        echo $this->code . ":" . $this->name . "<br>\n";
    }
}

class Group extends OrganizationEntry{
    private $entries;
    public function __construct($code, $name){
        parent::__construct($code, $name);
        $this->entries = array();
    }
    
    public function add(OrganizationEntry $entry){
        array_push($this->entries, $entry);
    }
    
    public function dump(){
        parent::dump();
        foreach($this->entries as $entry){
            $entry->dump();
        }
    }
}

class Employee extends OrganizationEntry{
    public function __construct($code, $name){
        parent::__construct($code, $name);
    }
    
    public function add(OrganizationEntry $entry){
        throw new Exception('method not allowed');
    }
}

$root_entry = new Group("001", "本社");
$root_entry->add(new Employee("00101", "CEO"));
$root_entry->add(new Employee("00102", "CTO"));

$group1 = new Group("010", "○○支店");
$group1->add(new Employee("01001", "支店長"));
$group1->add(new Employee("01002", "佐々木"));
$group1->add(new Employee("01003", "鈴木"));
$group1->add(new Employee("01004", "吉田"));

$group2 = new Group("110", "△△支店");
$group2->add(new Employee("11001", "川村"));
$group1->add($group2);
$root_entry->add($group2);

$group3 = new Group("020", "××支店");
$group3->add(new Employee("02001", "荻原"));
$group3->add(new Employee("02002", "田島"));
$group3->add(new Employee("02003", "白井"));
$root_entry->add($group3);

$root_entry->dump();