DataServicesFactory.php

<?php
namespace CloseContacts\Lib\DataServices;

use Phalcon\Di\InjectionAwareInterface;

class DataServiceFactory implements InjectionAwareInterface
{
    /* @var \Phalcon\Di\FactoryDefault - Dependency injector instance */
    protected $_di;

    /* @var string $_nsPrefix Data Services namespace */
    private $_nsPrefix = __NAMESPACE__ . '\\';

    /**
     * @return \Phalcon\Di\FactoryDefault
     */
    public function getDI()
    {
        return $this->_di;
    }

    /**
     * @param \Phalcon\DiInterface $dependencyInjector
     */
    public function setDI( \Phalcon\DiInterface $dependencyInjector )
    {
        $this->_di = $dependencyInjector;
    }

    /**
    * Load and return \Api\Lib\Data\Services\DataServiceAbstract instance.
    *
    * @param string $dataService
    * @return \CloseContacts\Lib\DataServices\DataServiceAbstract instance
    */
    public function load( $dataService )
    {
        try {
            $serviceName = ucfirst( (string) $dataService );
            $serviceClass = $this->_nsPrefix . $serviceName;
            if ( class_exists( $serviceClass ) ) {
                $diServiceName = 'dataService' . $serviceName;
                if ( $this->getDI()->has( $diServiceName ) ) {
                    return $this->getDI()->get( $diServiceName );
                } else {
                    $dataServiceInstance = new $serviceClass(
                        $this->getDI()->get( 'modelsManager'),
                        $this->getDI()->get( 'transactions' ),
                        $this->getDI()->get( 'validation' )
                    );

                    $this->getDI()->set( $diServiceName, $dataServiceInstance, true );
                    return $dataServiceInstance;
                }
            }
            return null;
        } catch ( \Exception $e ) {
            return null;
        }
    }
}