CollectionValidator.php

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<?php
namespace TYPO3\CMS\Extbase\Validation\Validator;

class CollectionValidator extends GenericObjectValidator {

    protected $supportedOptions = array(
        'elementValidator' => array(NULL, 'The validator type to use for the collection elements', 'string'),
        'elementType' => array(NULL, 'The type of the elements in the collection', 'string'),
        'validationGroups' => array(NULL, 'The validation groups to link to', 'string'),
    );

    protected $validatorResolver;

    public function validate($value) {
        $this->result = new \TYPO3\CMS\Extbase\Error\Result();

        if ($this->acceptsEmptyValues === FALSE || $this->isEmpty($value) === FALSE) {
            if ((is_object($value) && !\TYPO3\CMS\Extbase\Utility\TypeHandlingUtility::isCollectionType(get_class($value))) && !is_array($value)) {
                $this->addError('The given subject was not a collection.', 1317204797);
                return $this->result;
            } elseif ($value instanceof \TYPO3\CMS\Extbase\Persistence\Generic\LazyObjectStorage && !$value->isInitialized()) {
                return $this->result;
            } elseif (is_object($value) && $this->isValidatedAlready($value)) {
                return $this->result;
            } else {
                $this->isValid($value);
            }
        }
        return $this->result;
    }

    public function isValid($value) {
        if (!$this->configurationManager->isFeatureEnabled('rewrittenPropertyMapper')) {
            // @deprecated since Extbase 1.4.0, will be removed two versions after Extbase 6.1
            if ($this->validatedInstancesContainer == NULL) {
                $this->validatedInstancesContainer = new \SplObjectStorage();
            }

            if ($this->result == NULL) {
                $this->result = new \TYPO3\CMS\Extbase\Error\Result();
            }
        }

        foreach ($value as $index => $collectionElement) {
            if (isset($this->options['elementValidator'])) {
                $collectionElementValidator = $this->validatorResolver->createValidator($this->options['elementValidator']);
            } elseif (isset($this->options['elementType'])) {
                if (isset($this->options['validationGroups'])) {
                    $collectionElementValidator = $this->validatorResolver->getBaseValidatorConjunction($this->options['elementType'], $this->options['validationGroups']);
                } else {
                    $collectionElementValidator = $this->validatorResolver->getBaseValidatorConjunction($this->options['elementType']);
                }
            } else {
                return;
            }
            if ($collectionElementValidator instanceof ObjectValidatorInterface) {
                $collectionElementValidator->setValidatedInstancesContainer($this->validatedInstancesContainer);
            }
            $this->result->forProperty($index)->merge($collectionElementValidator->validate($collectionElement));
        }
    }
}