JsonReader

json.php

<?php

require __DIR__ . '/../vendor/autoload.php';


use Doctrine\Common\Annotations\AnnotationRegistry;
use JMS\Serializer\Annotation as Serializer;
use JMS\Serializer\Annotation\Type;
use JMS\Serializer\SerializerBuilder;
use pcrov\JsonReader\JsonReader;

AnnotationRegistry::registerLoader('class_exists');

$json = <<<'JSON'
{
    "type": "donut",
    "name": "Cake",
    "test": {
        "type": "donut",
        "name": "Cake"
    },
    "toppings": [
        { "id": 5002, "type": "Glazed" },
        { "id": 5006, "type": "Chocolate with Sprinkles" },
        { "id": 5004, "type": "Maple" }
    ]
}
JSON;

class Toppings {
    /**
     * @Type("int")
     */
    private $id;
    /**
     * @Type("string")
     */
    private $type;

    /**
     * @param mixed $id
     */
    public function setId($id)
    {
        $this->id = $id;
    }

    /**
     * @param mixed $type
     */
    public function setType($type)
    {
        $this->type = $type;
    }
}

class Donut {
    /**
     * @Type("string")
     */
    private $type;
    /**
     * @Type("string")
     */
    private $name;
    /**
     * @Type("Toppings")
     */
    private $toppings;

    /**
     * @Type("Donut")
     */
    private $test;

    /**
     * @param mixed $test
     */
    public function setTest($test)
    {
        $this->test = $test;
    }

    public function setType($type)
    {
        $this->type = $type;
    }

    /**
     * @param mixed $name
     */
    public function setName($name)
    {
        $this->name = $name;
    }

    /**
     * @param mixed $toppings
     */
    public function setToppings($toppings)
    {
        $this->toppings = $toppings;
    }
}


$reader = new JsonReader();
$reader->json($json);

$map = [
    Donut::class => [
        'properties' => [
            'toppings' => Toppings::class,
            'test' => Donut::class
        ]
    ]
];

$mapper = new ObjectMapper($map);

$start = microtime(true);
$result = $mapper->map($json, Donut::class);
var_dump((microtime(true) - $start) * 1000);

$start = microtime(true);
$result = json_decode($json);
var_dump((microtime(true) - $start) * 1000);

$serializer = SerializerBuilder::create()
    ->addMetadataDir(__DIR__)
    ->setCacheDir(__DIR__)
    ->build();
$start = microtime(true);
$object = $serializer->deserialize($json, Donut::class, 'json');
var_dump((microtime(true) - $start) * 1000);

var_dump($result);


class ObjectMapper {
    private $typeMap;

    /**
     * ObjectMapper constructor.
     * @param $typeMap
     */
    public function __construct($typeMap)
    {
        $this->typeMap = $typeMap;
    }


    public function map($data, $type) {
        $reader = new JsonReader();
        $reader->json($data);
        return $this->read($reader, $type);
    }

    private function read(JsonReader $reader, $type) {
        $result = null;
        while($reader->read()) {
            switch ($reader->type()) {
                case JsonReader::BOOL:
                case JsonReader::NUMBER:
                case JsonReader::STRING:
                    return $reader->value();
                case JsonReader::OBJECT:
                    $result = new $type;
                    return $this->readProperties($reader, $type, $result);
                case JsonReader::END_OBJECT:
                    return $result;
                case JsonReader::ARRAY:
                    return $this->readItems($reader, $type);
                    break;
                case JsonReader::END_ARRAY:
                    return $result;
            }
        }
    }

    private function readProperties(JsonReader $reader, $type, $result) {
        while ($reader->read()) {
            switch ($reader->type()) {
                case JsonReader::BOOL:
                case JsonReader::NUMBER:
                case JsonReader::STRING:
                    $method = 'set' . ucfirst($reader->name());
                    $result->$method($reader->value());
                    break;
                case JsonReader::OBJECT:
                    $name = $reader->name();
                    if (isset($this->typeMap[$type]['properties'][$name])) {
                        $propertyType = $this->typeMap[$type]['properties'][$name];
                    }
                    $method = 'set' . ucfirst($reader->name());
                    $object = new $propertyType;
                    $result->$method($this->readProperties($reader, $propertyType, $object));
                    break;
                case JsonReader::END_OBJECT:
                    return $result;
                case JsonReader::ARRAY:
                    $name = $reader->name();
                    if (isset($this->typeMap[$type]['properties'][$name])) {
                        $type = $this->typeMap[$type]['properties'][$name];
                    }
                    $method = 'set' . ucfirst($reader->name());
                    $items = $this->readItems($reader, $type);
                    $result->$method($items);
                    break;
                case JsonReader::END_ARRAY:
                    break;
            }
        }
    }

    private function readItems(JsonReader $reader, $type) {
        $result = [];
        while ($reader->read()) {
            switch ($reader->type()) {
                case JsonReader::BOOL:
                case JsonReader::NUMBER:
                case JsonReader::STRING:
                    $result[] = $reader->value();
                    break;
                case JsonReader::OBJECT:
                    $object = new $type;
                    $result[] = $this->readProperties($reader, $type, $object);
                    break;
                case JsonReader::END_OBJECT:
                    break;
                case JsonReader::ARRAY:
                    $result[] = $this->read($reader, $type);
                    break;
                case JsonReader::END_ARRAY:
                    return $result;
            }
        }
    }
}