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<?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\Protocol\Text;
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use Predis\CommunicationException;
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use Predis\Connection\ComposableConnectionInterface;
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use Predis\Protocol\ProtocolException;
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use Predis\Protocol\ResponseHandlerInterface;
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/**
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* Implements a response handler for integer replies using the standard wire
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* protocol defined by Redis.
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*
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* @link http://redis.io/topics/protocol
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* @author Daniele Alessandri <suppakilla@gmail.com>
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*/
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class ResponseIntegerHandler implements ResponseHandlerInterface
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{
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/**
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* Handles an integer reply returned by Redis.
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*
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* @param ComposableConnectionInterface $connection Connection to Redis.
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* @param string $number String representation of an integer.
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* @return int
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*/
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public function handle(ComposableConnectionInterface $connection, $number)
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{
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if (is_numeric($number)) {
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return (int) $number;
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}
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if ($number !== 'nil') {
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CommunicationException::handle(new ProtocolException(
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$connection, "Cannot parse '$number' as numeric response"
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));
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}
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return null;
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}
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}
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