/**
* Prepare and inject a named hydrator
*
* Takes a string indicating a hydrator class name, instantiates the class
* by that name, and injects the hydrator instance into the form.
*
* @param string $hydratorName
* @param FormInterface $form
* @param string $method
* @return void
* @throws Exception\DomainException if $hydratorName is not a string, does not resolve to a known class, or the class does not implement Hydrator\HydratorInterface
*/
protected function prepareAndInjectHydrator($hydratorName, FormInterface $form, $method)
{
if (!is_string($hydratorName)) {
throw new Exception\DomainException(sprintf(
'%s expects string hydrator class name; received "%s"',
$method,
(is_object($hydratorName) ? get_class($hydratorName) : gettype($hydratorName))
));
}
if (!class_exists($hydratorName)) {
throw new Exception\DomainException(sprintf(
'%s expects string hydrator name to be a valid class name; received "%s"',
$method,
$hydratorName
));
}
$hydrator = new $hydratorName;
if (!$hydrator instanceof Hydrator\HydratorInterface) {
throw new Exception\DomainException(sprintf(
'%s expects a valid implementation of Zend\Form\Hydrator\HydratorInterface; received "%s"',
$method,
$hydratorName
));
}
$form->setHydrator($hydrator);
return;
}
