/**
* Checks if a cache entry with the specified identifier exists.
*
* @param string $entryIdentifier An identifier specifying the cache entry
* @return boolean TRUE if such an entry exists, FALSE if not
* @author Robert Lemke <*****@*****.**>
* @author Karsten Dambekalns <*****@*****.**>
*/
public function has($entryIdentifier)
{
if (!$this->isValidEntryIdentifier($entryIdentifier)) {
throw new InvalidArgumentException('"' . $entryIdentifier . '" is not a valid cache entry identifier.', 1233058486);
}
return $this->backend->has($entryIdentifier);
}
