Entity Visitor

Entities.php

class FooEntity implements Entity
{

	// ... data ...

	public function acceptEntityVisitor(EntityVisitor $visitor)
	{
		$visitor.visitFooEntity($this);
	}

	public function doSomething() {}

}

class BarEntity implements Entity
{

	// ... data ...
	
	public function acceptEntityVisitor(EntityVisitor $visitor)
	{
		$visitor.visitBarEntity($this);
	}

	public function doSomethingElse() {}

}

Entity.php

interface Entity
{

	function acceptEntityVisitor(EntityVisitor $visitor);

}

EntityService.php

class EntityService implements EntityVisitor
{

	public function visitFooEntity(FooEntity $entity)
	{
		$entity->doSomething();
		// ...
		echo "Something done with a foo entity";
	}

	public function visitBarEntity(BarEntity $entity)
	{
		$entity->doSomethingElse();
		// ...
		echo "Something else done with a bar entity";
	}

}

EntityVisitor.php

interface EntityVisitor
{

	function visitFooEntity(FooEntity $entity);

	function visitBarEntity(BarEntity $entity);

}

Presenter.php

class Presenter extends Nette\Application\UI\Presenter
{

	// ...

	/**
	 * @inject @var EntityService
	 */
	public $entityService;

	public function actionDoSomething($id)
	{
		/** @var $entity Entity */
		$entity = $this->entityRepository->find($id);
		$entity->acceptEntityVisitor($this->entityService);
	}

}