/**
     * @service payout_history export
     * @return Gpf_Rpc_Serializable
     */
    public function getCSVFile(Gpf_Rpc_Params $params) {
        $this->initParamsForCSVFile($params);

        $views = $params->get("columns");
        $header = array();
        for ($i = 2; $i < count($views); $i++) {
            if ($views[$i][0] === self::ACTIONS) {
                continue;
            }
            $header[] = $views[$i][0];
        }
        if ($this->_fileName != null) {
            $fileName = $this->_fileName.".csv";
        } else {
            $fileName = "grid.csv";
        }

        $viewResult = new Gpf_Data_RecordSet();
        $viewResult->setHeader($header);

        $result = $this->getResultForCSV();

        $csvGenerator = new Gpf_Csv_GeneratorResponse($fileName, $header, null);
        if ($result->getSize() > 0) {
            foreach ($result as $record) {
               $row = new Gpf_Data_Record($header);
               foreach ($header as $column) {
                  $row->set($column, $record->get($column));
               }
               $csvGenerator->add($row);
            }
        }

        return $csvGenerator->getFile();
    }
    /**
     * Returns csv file with data for grid
     *
     * @service
     *
     * @param $filters
     * @param $sort_col
     * @param $sort_asc
     * @param Gpf_Data_RecordSet $columns
     * @param Gpf_Data_RecordSer $views
     * @return Gpf_Rpc_Serializable
     */
    public function getCSVFile(Gpf_Rpc_Params $params) {
        $this->initParamsForCSVFile($params);

        if ($this->_fileName != null) {
            $fileName = $this->_fileName.".csv";
        } else {
            $fileName = "grid.csv";
        }
        $this->createResultSelect();
        $result = $this->initResult();
        $dataHeader = $this->createHeader($params->get("columns"));
        $dataHeader = $this->insertRequiredColumnsToCSVHeader($dataHeader);
        $csvGenerator = new Gpf_Csv_GeneratorResponse($fileName, $dataHeader, null, $this->createExportFileHeader($dataHeader));
        foreach ($iterator = $this->createRowsIterator() as $row) {
            $csvGenerator->add($row);
        }

        return $csvGenerator->getFile();
    }