<?php
/*
* This file is part of the Symfony package.
*
* (c) Fabien Potencier <fabien@symfony.com>
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*/
namespace Symfony\Component\Serializer\Encoder;
/**
* Decodes JSON data
*
* @author Sander Coolen <sander@jibber.nl>
*/
class JsonDecode implements DecoderInterface
{
/**
* Specifies if the returned result should be an associative array or a nested stdClass object hierarchy.
*
* @var Boolean
*/
private $associative;
/**
* Specifies the recursion depth.
*
* @var integer
*/
private $recursionDepth;
private $lastError = JSON_ERROR_NONE;
protected $serializer;
/**
* Constructs a new JsonDecode instance.
*
* @param Boolean $associative True to return the result associative array, false for a nested stdClass hierarchy
* @param integer $depth Specifies the recursion depth
*/
public function __construct($associative = false, $depth = 512)
{
$this->associative = $associative;
$this->recursionDepth = (int) $depth;
}
/**
* Returns the last decoding error (if any).
*
* @return integer
*
* @see http://php.net/manual/en/function.json-last-error.php json_last_error
*/
public function getLastError()
{
return $this->lastError;
}
/**
* Decodes data.
*
* @param string $data The encoded JSON string to decode
* @param string $format Must be set to JsonEncoder::FORMAT
* @param array $context An optional set of options for the JSON decoder; see below
*
* The $context array is a simple key=>value array, with the following supported keys:
*
* json_decode_associative: boolean
* If true, returns the object as associative array.
* If false, returns the object as nested stdClass
* If not specified, this method will use the default set in JsonDecode::__construct
*
* json_decode_recursion_depth: integer
* Specifies the maximum recursion depth
* If not specified, this method will use the default set in JsonDecode::__construct
*
* json_decode_options: integer
* Specifies additional options as per documentation for json_decode. Only supported with PHP 5.4.0 and higher
*
* @return mixed
*
* @see http://php.net/json_decode json_decode
*/
public function decode($data, $format, array $context = array())
{
$context = $this->resolveContext($context);
$associative = $context['json_decode_associative'];
$recursionDepth = $context['json_decode_recursion_depth'];
$options = $context['json_decode_options'];
if (version_compare(PHP_VERSION, '5.4.0') >= 0) {
$decodedData = json_decode($data, $associative, $recursionDepth, $options);
} else {
$decodedData = json_decode($data, $associative, $recursionDepth);
}
$this->lastError = json_last_error();
return $decodedData;
}
/**
* {@inheritdoc}
*/
public function supportsDecoding($format)
{
return JsonEncoder::FORMAT === $format;
}
/**
* Merges the default options of the Json Decoder with the passed context.
*
* @param array $context
*
* @return array
*/
private function resolveContext(array $context)
{
$defaultOptions = array(
'json_decode_associative' => $this->associative,
'json_decode_recursion_depth' => $this->recursionDepth,
'json_decode_options' => 0
);
return array_merge($defaultOptions, $context);
}
}
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