Object mapper

An ObjectMapper for PHP (inspired by ObjectMapper in java)

Installation

You can install the package via composer:

composer require nddcoder/object-mapper

Usage

use Nddcoder\ObjectMapper\ObjectMapper;

class User {
    public string $name;
    public string $email;
}

$objectMapper = new ObjectMapper();

//Make object from json string
$jsonString = '{"name":"Dung Nguyen Dang","email":"[email protected]"}';
$user = $objectMapper->readValue($jsonString, User::class);
echo $user->name; //Dung Nguyen Dang
echo $user->email; //[email protected]

//You can pass an associative array to readValue function instead of string
$user = $objectMapper->readValue(['name' => 'Dung Nguyen Dang', 'email' => '[email protected]'], User::class);

//Convert object to json string
$userJsonString = $objectMapper->writeValueAsString($user);
echo $userJsonString; //{"name":"Dung Nguyen Dang","email":"[email protected]"}

Array Property

Use ArrayProperty Attribute to specific type of array item

use Nddcoder\ObjectMapper\ObjectMapper;
use Nddcoder\ObjectMapper\Attributes\ArrayProperty;

class Comment {
    public string $from;
    public string $content;
}

class Post {
    public string $title;
    
    #[ArrayProperty(Comment::class)]
    public array $comments;
}

$objectMapper = new ObjectMapper();

//Make object from json string
$jsonString = '{"title":"New Blog Post","comments":[{"from":"nddcoder","content":"Hello"}]}';
$post = $objectMapper->readValue($jsonString, Post::class);
echo $post->title; //New Blog Post
print_r($post->comments);
/*
Array
(
    [0] => Comment Object
        (
            [from] => nddcoder
            [content] => Hello
        )

)
*/

Custom JSON property

You can use JsonProperty('<propertyName>') to custom name for a property

use Nddcoder\ObjectMapper\ObjectMapper;
use Nddcoder\ObjectMapper\Attributes\JsonProperty;

class Post {
    public string $title;
    
    #[JsonProperty('body')]
    public string $content;
}

$objectMapper = new ObjectMapper();

//Make object from json string
$jsonString = '{"title":"New Blog Post","body":"Blog body here"}';
$post = $objectMapper->readValue($jsonString, Post::class);
echo $post->title; //New Blog Post
echo $post->content; //Blog body here

//Convert object to json string
$postJsonString = $objectMapper->writeValueAsString($post);
echo $postJsonString; //{"title":"New Blog Post","body":"Blog body here"}

Custom behavior via getter/setter

You can define getter/setter to custom behavior when get/set a property

use Nddcoder\ObjectMapper\ObjectMapper;
use Nddcoder\ObjectMapper\Attributes\JsonProperty;

class User {
    public string $username;
    protected string $password;
    
    public function setUsername(string $username): void
    {
        $this->username = strtolower($username);
    }
    
    public function getPassword(): ?string
    {
        return null;
    }
    
    public function setPassword(string $password): void
    {
        $this->password = md5($password);
    }
}

$objectMapper = new ObjectMapper();

//Make object from json string
$jsonString = '{"username":"NDDCoder","password":"secret"}';
$user = $objectMapper->readValue($jsonString, User::class);
print_r($user);
/*
User Object
(
    [username] => nddcoder
    [password:protected] => 5ebe2294ecd0e0f08eab7690d2a6ee69
)
*/


//Convert object to json string
$userJsonString = $objectMapper->writeValueAsString($user);
echo $userJsonString; //{"username":"nddcoder","password":null}

Encoders

By default, package included 2 encoders for DateTimeInterface and stdClass

You can create your custom encoder by implements ObjectMapperEncoder interface

use MongoDB\BSON\ObjectId;
use Nddcoder\ObjectMapper\Contracts\ObjectMapperEncoder;

class ObjectIdEncoder implements ObjectMapperEncoder
{
    public function encode(mixed $value, ?string $className = null): string
    {
        return (string) $value;
    }

    public function decode(mixed $value, ?string $className = null): mixed
    {
        return new ObjectId($value);
    }
}

and then using ObjectMapper::addGlobalEncoder to add it as global or addEncoder to add it to current instance only

ObjectMapper::addGlobalEncoder(ObjectId::class, ObjectIdEncoder::class);
$objectMapper->addEncoder(ObjectId::class, ObjectIdEncoder::class);

You can remove global encoder using ObjectMapper::removeGlobalEncoder or removeEncoder to remove encoder from current instance only

ObjectMapper::removeGlobalEncoder(ObjectId::class);
$objectMapper->removeEncoder(ObjectId::class);

Testing

composer test

Changelog

Please see CHANGELOG for more information on what has changed recently.

Contributing

Please see CONTRIBUTING for details.

Security Vulnerabilities

Please review our security policy on how to report security vulnerabilities.

Credits

• Dung Nguyen Dang
• All Contributors

License

The MIT License (MIT). Please see License File for more information.