doctrine / orm

     *

     * @return array

     */

    public function getRootAliases()

    {

        $aliases = [];

        foreach ($this->_dqlParts['from'] as &$fromClause) {

            if (is_string($fromClause)) {

                $spacePos = strrpos($fromClause, ' ');

                $from     = substr($fromClause, 0, $spacePos);

                $alias    = substr($fromClause, $spacePos + 1);

                $fromClause = new Query\Expr\From($from, $alias);

            }

            $aliases[] = $fromClause->getAlias();

        }

        return $aliases;

    }

    /**

     * Gets all the aliases that have been used in the query.

     *

     * @return array

     */

    public function getRootEntities()

    {

        $entities = [];

        foreach ($this->_dqlParts['from'] as &$fromClause) {

            if (is_string($fromClause)) {

                $spacePos = strrpos($fromClause, ' ');

                $from     = substr($fromClause, 0, $spacePos);

                $alias    = substr($fromClause, $spacePos + 1);

                $fromClause = new Query\Expr\From($from, $alias);

            }

            $entities[] = $fromClause->getFrom();

        }

        return $entities;

    }

    /**

     * Sets a query parameter for the query being constructed.