gistfile1.php

abstract class ContentDao extends EntityDao
{
    protected $imageType;

    public function __construct($imageType)
    {
        $this->imageType = $imageType;
    }

    public function getImageType()
    {
        $qb = $this->createQueryBuilder();
        $query = $qb->select('type')
            ->from('\App\Cropper\ImageType','type')
            ->where('type.name = :name')
            ->getQuery()
            ->setParameter('name',$this->imageType);
        return $query->getOneOrNullResult();
    }

    public function getPossibleImages()
    {
        $qb = $this->createQueryBuilder();
        $query = $qb->select('thumbnail')
            ->from('\App\Thumbnail\Thumbnail','thumbnail')
            ->from('\App\Cropper\Image','image')
            ->from('\App\Cropper\ImageType','type')
            ->where('image.imageType = type')
            ->andWhere('thumbnail.image = image')
            ->andWhere('type.name = :name')
            ->getQuery()
            ->setParameter('name', $this->imageType);
        return $query->execute();
    }

    public function getUnpublished()
    {
        return $this->findBy(array('published' => false),array());
    }

    public function getPublished()
    {
        return $this->findBy(array('published' => true),array());
    }
}

gistfile2.txt

class ShowDao extends ContentDao
{

}