/**
* @param string|array|AssertionInterface $assertion
* @return null|AssertionInterface
*/
protected function normalizeAssertion($assertion)
{
if (!$assertion) {
return;
}
if ($assertion instanceof AssertionInterface) {
return $assertion;
}
$assertion = (array) $assertion;
if (count($assertion) > 1) {
$assertionAggregate = new AssertionAggregate();
foreach ($ruleData['assertion'] as $plugin) {
if (is_string($plugin) && $this->assertionPluginManager->has($plugin)) {
$plugin = $this->assertionPluginManager->get($plugin);
}
if ($plugin instanceof AssertionInterface) {
$assertionAggregate->addAssertion($plugin);
}
}
return $assertionAggregate;
}
$assertion = reset($assertion);
if (!$assertion instanceof AssertionInterface) {
if (is_string($assertion) && $this->assertionPluginManager->has($assertion)) {
$assertion = $this->assertionPluginManager->get($assertion);
} else {
$assertion = null;
}
}
return $assertion;
}
