Extract OLE Objects from an Excel Document in Java

import com.spire.xls.*;
import com.spire.xls.core.IOleObject;

import java.io.*;

public class ExtractOLEObjects {
    public static void main(String[] args){
        //Create a Workbook instance
        Workbook workbook = new Workbook();

        //Load the Excel document
        workbook.loadFromFile("OLEObjectsExample.xlsx");

        //Get the first worksheet
        Worksheet sheet = workbook.getWorksheets().get(0);

        //Extract ole objects
        if (sheet.hasOleObjects()) {
            for (int i = 0; i < sheet.getOleObjects().size(); i++) {
                IOleObject object = sheet.getOleObjects().get(i);
                OleObjectType type = sheet.getOleObjects().get(i).getObjectType();
                switch (type) {
                    //Word document
                    case WordDocument:
                        byteArrayToFile(object.getOleData(), "output/extractOLE.docx");
                        break;
                    //PowerPoint document
                    case PowerPointSlide:
                        byteArrayToFile(object.getOleData(), "output/extractOLE.pptx");
                        break;
                    //PDF document
                    case AdobeAcrobatDocument:
                        byteArrayToFile(object.getOleData(), "output/extractOLE.pdf");
                        break;
                    //Excel document
                    case ExcelWorksheet:
                        byteArrayToFile(object.getOleData(), "output/extractOLE.xlsx");
                        break;
                }
            }
        }
    }
    public static void byteArrayToFile(byte[] datas, String destPath) {
        File dest = new File(destPath);
        try (InputStream is = new ByteArrayInputStream(datas);
             OutputStream os = new BufferedOutputStream(new FileOutputStream(dest, false));) {
            byte[] flush = new byte[1024];
            int len = -1;
            while ((len = is.read(flush)) != -1) {
                os.write(flush, 0, len);
            }
            os.flush();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}