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<?php namespace Bitrix\Main\DB; use Bitrix\Main\NotSupportedException; class ResultIterator implements \Iterator { /** @var Result */ private $result; /** @var int */ private $counter; private $currentData; /** * ResultIterator constructor. * * @param Result $result */ public function __construct(Result $result) { $this->result = $result; $this->counter = -1; } /** * Return the current element * @link http://php.net/manual/en/iterator.current.php * @return mixed Can return any type. * @since 5.0.0 */ public function current() { return $this->currentData; } /** * Move forward to next element * @link http://php.net/manual/en/iterator.next.php * @return void Any returned value is ignored. * @since 5.0.0 */ public function next() { $this->currentData = $this->result->fetch(); $this->counter++; } /** * Return the key of the current element * @link http://php.net/manual/en/iterator.key.php * @return mixed scalar on success, or null on failure. * @since 5.0.0 */ public function key() { return $this->counter; } /** * Checks if current position is valid * @link http://php.net/manual/en/iterator.valid.php * @return boolean The return value will be casted to boolean and then evaluated. * Returns true on success or false on failure. * @since 5.0.0 */ public function valid() { return $this->currentData !== false; } /** * Rewind the Iterator to the first element * @link http://php.net/manual/en/iterator.rewind.php * @throws NotSupportedException * @since 5.0.0 */ public function rewind() { if ($this->counter > 0) { throw new NotSupportedException('Could not rewind the iterator'); } $this->next(); } }