<?php
/**
 * Created by PhpStorm.
 * User: ZenGo
 * Date: 2017年2月9日
 * Time: 23:50
 * 简单工厂设计模式
 */
namespace DesignPattern\FactorPattern;

interface Shape
{
 public function draw();
}

class Rectangle implements Shape
{
 public function draw()
 {
 // TODO: Implement draw() method.
 print_r("Inside Rectangle::draw() method.");
 }
}

class Square implements Shape
{
 public function draw()
 {
 // TODO: Implement draw() method.
 print_r("Inside Square::draw() method.");
 }
}

class Circle implements Shape
{
 public function draw()
 {
 // TODO: Implement draw() method.
 print_r("Inside Circle::draw() method.");
 }
}

class ShapeFactory
{
 public function getShape($shapeType)
 {
 if ($shapeType == null) {
 return null;
 }

 $type = strtoupper($shapeType);
 if ($type == "CIRCLE") {
 return new Circle();
 } else if ($type == "RECTANGLE") {
 return new Rectangle();
 } else if ($type == "SQUARE") {
 return new Square();
 }
 return null;

 }
}

$type = 'RECTANGLE';
$shapeFac = new ShapeFactory();
if ($shapeFac->getShape($type)) {
 $shapeFac->getShape($type)->draw();
} else {
 print_r("类型不存在");
}