GermanFactory.php

<?php

/*
 * DesignPatternPHP
 */

namespace DesignPatterns\FactoryMethod;

/**
 * GermanFactory is vehicle factory in Germany
 */
class GermanFactory extends FactoryMethod
{

    /**
     * @inheritdoc
     */
    protected function createVehicle($type)
    {
        switch ($type) {

            case parent::CHEAP :
                return new Bicycle();
                break;

            case parent::FAST :
                $obj = new Porsche();
                // we can specialize the way we want some concrete Vehicle since
                // we know the class
                $obj->addTuningAMG();
                return $obj;
                break;

            default :
                throw new \InvalidArgumentException("$type is not a valid vehicle");
        }
    }

}