Doctrine2 Extract

<?php 

public function extract($entities ,array $columns = null)
{

    if (!is_array($entities)) $entities = [ $entities ];

    $fieldMappings = \EntityManager::getClassMetadata('Modules\Api\Entity\Product')->fieldMappings;
    $associationMappings = \EntityManager::getClassMetadata('Modules\Api\Entity\Product')->associationMappings;

    $extract = [];

    foreach ($entities as $key => $entity){

        //Fields
        foreach ($fieldMappings as $fieldName => $fieldDefinitions) {
            
            $getter = "get{$fieldName}";
            if (method_exists($entity, $getter)) 
                $extract[$key][$fieldName] = $entity->$getter();

        }

        //Associations
        foreach ($associationMappings as $associationName => $associationMapping) {
 
            $getter = "get{$associationName}";

            if (method_exists($entity, $getter)) 
                $association = $entity->$getter();

            switch ($associationMapping['type']) {
            
                case \Doctrine\ORM\Mapping\ClassMetadataInfo::MANY_TO_ONE:
                    $extract[$key][$associationName] = $association->getId();
                break;
                
                default:
                    # code...
                break;
                
            }
            
        }
    }
    return $extract;
}

?>