HumanHeightWeightConvert.php

<?php
/*
class一覧
Human系
└Human(Abstract)
　└Japanese 日本人クラス。cm,kgで身長体重を入出力
　└American 米国人クラス。ft,lbで身長体重を入出力
　└English  英国人クラス。ft,stで身長体重を入出力
　└Hyde     ハイドクラス。hyde,kgで身長体重を入出力

Converter系
└AbstractHumanConverter(Abstract)
　└JapaneseConverter 入力したHuman派生のオブジェクトを日本人オブジェクトに変換
　└AmericanConverter 入力したHuman派生のオブジェクトを米国人オブジェクトに変換
　└EnglishConverter  入力したHuman派生のオブジェクトを英国人オブジェクトに変換
　└HydeConverter     入力したHuman派生のオブジェクトをハイドオブジェクトに変換
*/



// グローバル定数
define('hydePerCm', 0.00641026); // 1hyde = 156cm
define('ftPerCm', 0.0328084); // 1feet = 30.48cm
define('inPerCm', 0.39370079); // 1inch = 2.54cm
define('lbPerKg', 2.20462262); // 1ポンド = 0.45359237kg
define('stPerKg', 0.15747304); // 1ストーン = 6.35029318kg

// 人クラス群
abstract class Human
{
	private $weight; //kg
	private $height; //cm

	public function __construct($height, $weight)
	{
		$this->setHeight($height);
		$this->setWeight($weight);
	}

	abstract public function getHeightRate();
	abstract public function getWeightRate();

	public function getHeight()
	{
		return $this->height * $this->getHeightRate();
	}

	public function getHeightCm()
	{
		return $this->height;
	}

	public function setHeight($height)
	{
		$this->height = (float)$height / $this->getHeightRate();
	}

	public function setHeightCm($height)
	{
		$this->height = (float)$height;
	}

	public function getWeight()
	{
		return $this->weight * $this->getWeightRate();
	}

	public function getWeightKg()
	{
		return $this->weight;
	}

	public function setWeight($weight)
	{
		$this->weight = (float)$weight / $this->getWeightRate();
	}

	public function setWeightKg($weight)
	{
		$this->weight = (float)$weight;
	}
}

class Japanese extends Human
{
	public function getHeightRate()
	{
		return 1;
	}

	public function getWeightRate()
	{
		return 1;
	}
}

class American extends Human
{
	public function getHeightRate()
	{
		return ftPerCm;
	}

	public function getWeightRate()
	{
		return lbPerKg;
	}
}

class English extends Human
{
	public function getHeightRate()
	{
		return ftPerCm;
	}

	public function getWeightRate()
	{
		return stPerKg;
	}
}

class Hyde extends Human
{
	public function getHeightRate()
	{
		return hydePerCm;
	}

	public function getWeightRate()
	{
		return 1;
	}
}

// 人変換クラス群
abstract class AbstractHumanConverter
{
	abstract public function getNewHuman();

	public function convert(Human $human)
	{
		$newHuman = $this->getNewHuman();
		$newHuman->setHeightCm($human->getHeightCm());
		$newHuman->setWeightKg($human->getWeightKg());
		return $newHuman;
	}
}

class JapaneseConverter extends AbstractHumanConverter
{
	public function getNewHuman()
	{
		return new Japanese(null,null);
	}
}

class AmericanConverter extends AbstractHumanConverter
{
	public function getNewHuman()
	{
		return new American(null,null);
	}
}

class EnglishConverter extends AbstractHumanConverter
{
	public function getNewHuman()
	{
		return new English(null,null);
	}
}

class HydeConverter extends AbstractHumanConverter
{
	public function getNewHuman()
	{
		return new Hyde(null,null);
	}
}

///////////////////////////////////////////////////////////

// 身長168.2cm, 65.0kgのほげ谷さん
echo "HOGETANI\n";
echo "//////// Japanese /////////\n";
$hogetani = new Japanese(168.2, 65.0);
echo "Japanese height : {$hogetani->getHeight()} [cm]\n";
echo "Japanese weight : {$hogetani->getWeight()} [kg]\n";

// アメリカ単位系への変換
echo "//////// American /////////\n";
$converter = new AmericanConverter();
$hogetani_as_american = $converter->convert($hogetani);
echo "American height : {$hogetani_as_american->getHeight()} [ft]\n";
echo "American weight : {$hogetani_as_american->getWeight()} [lb]\n";

// Hyde単位系への変換
echo "//////// Hyde /////////\n";
$converter = new HydeConverter();
$hogetani_as_hyde = $converter->convert($hogetani);
echo "Hyde height : {$hogetani_as_hyde->getHeight()} [hyde]\n";
echo "Hyde weight : {$hogetani_as_hyde->getWeight()} [kg]\n";