JMS Serializer Exclusion Strategy to limit level of serialization

HautelookDoctrineExclusionStrategy.php

<?php

namespace Hautelook\ApiBundle\Serializer\Handler;

use JMS\SerializerBundle\Serializer\Exclusion\ExclusionStrategyInterface;
use JMS\SerializerBundle\Metadata\ClassMetadata;
use JMS\SerializerBundle\Metadata\PropertyMetadata;

class HautelookDoctrineExclusionStrategy implements ExclusionStrategyInterface
{
	static private $level = 0;
	/**
     * Whether the class should be skipped.
     *
     * @param ClassMetadata $metadata
     * @param object        $object instance, provided during serialization but not deserialization
     *
     * @return boolean
     */
    function shouldSkipClass(ClassMetadata $metadata, $object = null)
    {
    	self::$level++;

    	return self::$level > 1;
    }

    /**
     * Whether the property should be skipped.
     *
     * @param PropertyMetadata $property
     * @param object           $object instance, provided during serialization but not deserialization
     *
     * @return boolean
     */
    function shouldSkipProperty(PropertyMetadata $property, $object = null)
    {
    	return false;
    }
}