1.5. Prototype
1.5.1. Amaç
Nesneleri standart yolla (örn. new Foo()) oluşturmanın maliyetinden kaçınmak, bunun yerine bir prototip oluşturmak ve klonlamak.
1.5.2. Örnekler
Yüksek oranda veri (örn. ORM aracılığıyla bir veritabanında aynı anda 1.000.000 satır oluşturma).
1.5.3. UML Diyagramı
1.5.4. Kod
Bu kodu Github üzerinde de bulabilirsiniz.
BookPrototype.php
1<?php
2
3declare(strict_types=1);
4
5namespace DesignPatterns\Creational\Prototype;
6
7abstract class BookPrototype
8{
9 protected string $title;
10 protected string $category;
11
12 abstract public function __clone();
13
14 final public function getTitle(): string
15 {
16 return $this->title;
17 }
18
19 final public function setTitle(string $title): void
20 {
21 $this->title = $title;
22 }
23}
BarBookPrototype.php
1<?php
2
3declare(strict_types=1);
4
5namespace DesignPatterns\Creational\Prototype;
6
7class BarBookPrototype extends BookPrototype
8{
9 protected string $category = 'Bar';
10
11 public function __clone()
12 {
13 }
14}
FooBookPrototype.php
1<?php
2
3declare(strict_types=1);
4
5namespace DesignPatterns\Creational\Prototype;
6
7class FooBookPrototype extends BookPrototype
8{
9 protected string $category = 'Foo';
10
11 public function __clone()
12 {
13 }
14}
1.5.5. Test
Tests/PrototypeTest.php
1<?php
2
3declare(strict_types=1);
4
5namespace DesignPatterns\Creational\Prototype\Tests;
6
7use DesignPatterns\Creational\Prototype\BarBookPrototype;
8use DesignPatterns\Creational\Prototype\FooBookPrototype;
9use PHPUnit\Framework\TestCase;
10
11class PrototypeTest extends TestCase
12{
13 public function testCanGetFooBook()
14 {
15 $fooPrototype = new FooBookPrototype();
16 $barPrototype = new BarBookPrototype();
17
18 for ($i = 0; $i < 10; $i++) {
19 $book = clone $fooPrototype;
20 $book->setTitle('Foo Book No ' . $i);
21 $this->assertInstanceOf(FooBookPrototype::class, $book);
22 }
23
24 for ($i = 0; $i < 5; $i++) {
25 $book = clone $barPrototype;
26 $book->setTitle('Bar Book No ' . $i);
27 $this->assertInstanceOf(BarBookPrototype::class, $book);
28 }
29 }
30}