Doctrine 2 - Adding custom field type

config.yml

# 2nd solution
# Symfony's way :-)

doctrine:
    dbal:
        default_connection: default
        types:
            sphinx_mva:
                class:      SomeBundle\Doctrine\Types\SphinxMvaType
                commented:  true

SomeBundle.php

<?php
// 1st solution

namespace SomeBundle;

use Symfony\Component\HttpKernel\Bundle\Bundle;
use Doctrine\DBAL\Types\Type;

class CormesClipkitTestBundle extends Bundle
{
    /**
     * {@inheritdoc}
     */
    public function boot()
    {
        // Add sphinx_mva type
        if ( ! Type::hasType('sphinx_mva')) {
            Type::addType('sphinx_mva', 'Cormes\Clipkit\TestBundle\Doctrine\Types\SphinxMvaType');
        }

        // Add sphinx_mva type to current connection.
        // Notice: during tests there can be multiple connections to db so
        // it will be needed to add 'sphinx_mva' to all new connections if not defined.
        /** @var \Doctrine\DBAL\Platforms\AbstractPlatform $dbPlatform */
        $dbPlatform = $this->container
            ->get('doctrine.orm.sphinx_entity_manager')
            ->getConnection()
            ->getDatabasePlatform();
        if ( ! $dbPlatform->hasDoctrineTypeMappingFor('sphinx_mva')) {
            $dbPlatform->registerDoctrineTypeMapping('mva', 'sphinx_mva');
        }
    }
}

SphinxMvaType.php

<?php

namespace SomeBundle\Doctrine\Types;

use Doctrine\DBAL\Types\Type;
use Doctrine\DBAL\Platforms\AbstractPlatform;

class SphinxMvaType extends Type
{
    const SPHINX_MVA = 'sphinx_mva';

    /**
     * {@inheritdoc}
     */
    public function getSQLDeclaration(array $fieldDeclaration, AbstractPlatform $platform)
    {
        return $platform->getDoctrineTypeMapping('BLOB');
        // return $platform->getClobTypeDeclarationSQL($fieldDeclaration);
    }

    /**
     * {@inheritdoc}
     */
    public function convertToDatabaseValue($value, AbstractPlatform $platform)
    {
        return ($value === null) ? null : sprintf('(%s)', implode(',', $value));
    }

    /**
     * {@inheritdoc}
     */
    public function convertToPHPValue($value, AbstractPlatform $platform)
    {
        return ($value === null) ? null : explode(',', trim($value, " \t\n\r\0\x0B()"));
    }

    /**
     * {@inheritdoc}
     */
    public function getName()
    {
        return self::SPHINX_MVA;
    }
}

Video.php

<?php

namespace SomeBundle\Entity;

use Doctrine\ORM\Mapping as ORM;

/**
 * Video
 *
 * @ORM\Table(name="video")
 * @ORM\Entity
 */
class Video
{
    /**
     * @var string
     *
     * @ORM\Column(type="string", length="255")
     */
    private $title;

    /**
     * @var array
     *
     * @ORM\Column(type="sphinx_mva")
     */
    private $channels;

    ...
}