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<?php /* * This file is part of the Predis package. * * (c) 2009-2020 Daniele Alessandri * (c) 2021-2023 Till Krüss * * For the full copyright and license information, please view the LICENSE * file that was distributed with this source code. */ namespace Predis\Response\Iterator; use Countable; use Iterator; use Predis\Response\ResponseInterface; use ReturnTypeWillChange; /** * Iterator that abstracts the access to multibulk responses allowing them to be * consumed in a streamable fashion without keeping the whole payload in memory. * * This iterator does not support rewinding which means that the iteration, once * consumed, cannot be restarted. * * Always make sure that the whole iteration is consumed (or dropped) to prevent * protocol desynchronization issues. */ abstract class MultiBulkIterator implements Iterator, Countable, ResponseInterface { protected $current; protected $position; protected $size; /** * @return void */ #[ReturnTypeWillChange] public function rewind() { // NOOP } /** * @return mixed */ #[ReturnTypeWillChange] public function current() { return $this->current; } /** * @return int|null */ #[ReturnTypeWillChange] public function key() { return $this->position; } /** * @return void */ #[ReturnTypeWillChange] public function next() { if (++$this->position < $this->size) { $this->current = $this->getValue(); } } /** * @return bool */ #[ReturnTypeWillChange] public function valid() { return $this->position < $this->size; } /** * Returns the number of items comprising the whole multibulk response. * * This method should be used instead of iterator_count() to get the size of * the current multibulk response since the former consumes the iteration to * count the number of elements, but our iterators do not support rewinding. * * @return int */ #[ReturnTypeWillChange] public function count() { return $this->size; } /** * Returns the current position of the iterator. * * @return int */ public function getPosition() { return $this->position; } /** * {@inheritdoc} */ abstract protected function getValue(); }
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