c58f935fdc
The example (and related documentation at redis.io) was not updated for 5 years. Redis had no sorted sets and hashes when the original code was written (!). An update was really needed. We also use a modern PHP client now: Predis. A copy is shipped within this repository to make life easier to newcomers trying Redis for the first time via this example.
83 lines
2 KiB
PHP
83 lines
2 KiB
PHP
<?php
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/*
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* This file is part of the Predis package.
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*
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* (c) Daniele Alessandri <suppakilla@gmail.com>
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*
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* For the full copyright and license information, please view the LICENSE
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* file that was distributed with this source code.
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*/
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namespace Predis\Iterator;
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/**
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* Abstracts the access to a streamable list of tuples represented
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* as a multibulk reply that alternates keys and values.
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*
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* @author Daniele Alessandri <suppakilla@gmail.com>
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*/
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class MultiBulkResponseTuple extends MultiBulkResponse implements \OuterIterator
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{
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private $iterator;
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/**
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* @param MultiBulkResponseSimple $iterator Multibulk reply iterator.
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*/
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public function __construct(MultiBulkResponseSimple $iterator)
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{
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$this->checkPreconditions($iterator);
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$virtualSize = count($iterator) / 2;
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$this->iterator = $iterator;
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$this->position = $iterator->getPosition();
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$this->current = $virtualSize > 0 ? $this->getValue() : null;
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$this->replySize = $virtualSize;
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}
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/**
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* Checks for valid preconditions.
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*
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* @param MultiBulkResponseSimple $iterator Multibulk reply iterator.
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*/
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protected function checkPreconditions(MultiBulkResponseSimple $iterator)
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{
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if ($iterator->getPosition() !== 0) {
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throw new \RuntimeException('Cannot initialize a tuple iterator with an already initiated iterator');
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}
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if (($size = count($iterator)) % 2 !== 0) {
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throw new \UnexpectedValueException("Invalid reply size for a tuple iterator [$size]");
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}
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}
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/**
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* {@inheritdoc}
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*/
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public function getInnerIterator()
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{
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return $this->iterator;
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}
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/**
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* {@inheritdoc}
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*/
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public function __destruct()
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{
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$this->iterator->sync(true);
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}
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/**
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* {@inheritdoc}
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*/
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protected function getValue()
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{
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$k = $this->iterator->current();
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$this->iterator->next();
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$v = $this->iterator->current();
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$this->iterator->next();
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return array($k, $v);
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}
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}
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