--- /dev/null
+<?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;
+
+use Symfony\Component\Serializer\Exception\UnexpectedValueException;
+
+/**
+ * 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 bool
+ */
+ private $associative;
+
+ /**
+ * Specifies the recursion depth.
+ *
+ * @var int
+ */
+ private $recursionDepth;
+
+ private $lastError = JSON_ERROR_NONE;
+
+ protected $serializer;
+
+ /**
+ * Constructs a new JsonDecode instance.
+ *
+ * @param bool $associative True to return the result associative array, false for a nested stdClass hierarchy
+ * @param int $depth Specifies the recursion depth
+ */
+ public function __construct($associative = false, $depth = 512)
+ {
+ $this->associative = $associative;
+ $this->recursionDepth = (int) $depth;
+ }
+
+ /**
+ * Returns the last decoding error (if any).
+ *
+ * @return int
+ *
+ * @deprecated since version 2.5, to be removed in 3.0.
+ * The {@self decode()} method throws an exception if error found.
+ * @see http://php.net/manual/en/function.json-last-error.php json_last_error
+ */
+ public function getLastError()
+ {
+ @trigger_error('The '.__METHOD__.' method is deprecated since version 2.5 and will be removed in 3.0. Catch the exception raised by the decode() method instead to get the last JSON decoding error.', E_USER_DEPRECATED);
+
+ 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 $context array is a simple key=>value array, with the following supported keys:
+ *
+ * json_decode_associative: boolean
+ * If true, returns the object as associative array.
+ * If false, returns the object as nested stdClass
+ * If not specified, this method will use the default set in JsonDecode::__construct
+ *
+ * json_decode_recursion_depth: integer
+ * Specifies the maximum recursion depth
+ * If not specified, this method will use the default set in JsonDecode::__construct
+ *
+ * json_decode_options: integer
+ * Specifies additional options as per documentation for json_decode. Only supported with PHP 5.4.0 and higher
+ *
+ * @return mixed
+ *
+ * @throws UnexpectedValueException
+ *
+ * @see http://php.net/json_decode json_decode
+ */
+ public function decode($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 (PHP_VERSION_ID >= 50400) {
+ $decodedData = json_decode($data, $associative, $recursionDepth, $options);
+ } else {
+ $decodedData = json_decode($data, $associative, $recursionDepth);
+ }
+
+ if (JSON_ERROR_NONE !== $this->lastError = json_last_error()) {
+ throw new UnexpectedValueException(json_last_error_msg());
+ }
+
+ 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);
+ }
+}