private function _createEntries(array $data)
    {
        foreach ($data as $row) {
            $mandatories = array('title', 'link', 'description');
            foreach ($mandatories as $mandatory) {
                if (!isset($row[$mandatory])) {
                    /**
                     * @see Zend_Feed_Builder_Exception
                     */
                    require_once 'Zend/Feed/Builder/Exception.php';
                    throw new Zend_Feed_Builder_Exception("$mandatory key is missing");
                }
            }
            $entry = new Zend_Feed_Builder_Entry($row['title'], $row['link'], $row['description']);
            if (isset($row['author'])) {
                $entry->setAuthor($row['author']);
            }
            if (isset($row['guid'])) {
                $entry->setId($row['guid']);
            }
            if (isset($row['content'])) {
                $entry->setContent($row['content']);
            }
            if (isset($row['lastUpdate'])) {
                $entry->setLastUpdate($row['lastUpdate']);
            }
            if (isset($row['comments'])) {
                $entry->setCommentsUrl($row['comments']);
            }
            if (isset($row['commentRss'])) {
                $entry->setCommentsRssUrl($row['commentRss']);
            }
            if (isset($row['source'])) {
                $mandatories = array('title', 'url');
                foreach ($mandatories as $mandatory) {
                    if (!isset($row['source'][$mandatory])) {
                        /**
                         * @see Zend_Feed_Builder_Exception
                         */
                        require_once 'Zend/Feed/Builder/Exception.php';
                        throw new Zend_Feed_Builder_Exception("$mandatory key of source property is missing");
                    }
                }
                $entry->setSource($row['source']['title'], $row['source']['url']);
            }
            if (isset($row['category'])) {
                $entry->setCategories($row['category']);
            }
            if (isset($row['enclosure'])) {
                $entry->setEnclosures($row['enclosure']);
            }

            $this->_entries[] = $entry;
        }
    }