Doctrine\ORM\Version::compare PHP Метод

    public static function compare($version)
    {
        $currentVersion = str_replace(' ', '', strtolower(self::VERSION));
        $version = str_replace(' ', '', $version);

        return version_compare($version, $currentVersion);
    }

 private function prepare()
 {
     $cmf = $this->em->getMetadataFactory();
     $metadata = new ClassMetadata('Mapping\\Fixture\\Unmapped\\Timestampable');
     $id = array();
     $id['fieldName'] = 'id';
     $id['type'] = 'integer';
     $id['nullable'] = false;
     $id['columnName'] = 'id';
     $id['id'] = true;
     $metadata->mapField($id);
     $created = array();
     $created['fieldName'] = 'created';
     $created['type'] = 'datetime';
     $created['nullable'] = false;
     $created['columnName'] = 'created';
     $metadata->mapField($created);
     $metadata->setIdGeneratorType(ClassMetadata::GENERATOR_TYPE_IDENTITY);
     $metadata->setIdGenerator(new \Doctrine\ORM\Id\IdentityGenerator(null));
     $metadata->setPrimaryTable(array('name' => 'temp_test'));
     $cmf->setMetadataFor('Mapping\\Fixture\\Unmapped\\Timestampable', $metadata);
     // trigger loadClassMetadata event
     $evm = $this->em->getEventManager();
     $eventArgs = new \Doctrine\ORM\Event\LoadClassMetadataEventArgs($metadata, $this->em);
     $evm->dispatchEvent(\Doctrine\ORM\Events::loadClassMetadata, $eventArgs);
     if (Version::compare('2.3.0-dev') <= 0) {
         $metadata->wakeupReflection($cmf->getReflectionService());
     }
     $schemaTool = new \Doctrine\ORM\Tools\SchemaTool($this->em);
     $schemaTool->dropSchema(array());
     $schemaTool->createSchema(array($this->em->getClassMetadata('Mapping\\Fixture\\Unmapped\\Timestampable')));
 }