getSignatureInfoEx method: cannot resolve symbol

[Former Community Member]

I am following an example in the Document Security 7.1 API Reference to validate a signature, using the code below in a JSP.

       DataBuffer pdfFile = dataManager.createFileDataBufferFromUrl(contentUrl);

       PDFDocument pdf = pdfFactory.openPDF(pdfFile);



       SignatureField[] sigFieldList = pdf.getSignatureFieldList();

       SignatureInfoEx sigInfo;

      

       for (int i = 0; i < sigFieldList.length; i++)

       {

    try

    {

     sigInfo = sigFieldList[i].getSignatureInfoEx();

    

     if (sigInfo.status == SignatureFieldStatus.VALID_SIGNATURE)

     {

       out.println("valid");

     }

    }

    catch (NotSigned e)

    {

      /* This field was not signed */

    }

       }

When I run the JSP, I get the following error:

An error occurred at line: 16 in the jsp file: /validate.jsp

Generated servlet error:

C:\jboss-3.2.5\server\all\work\jboss.web\localhost\validate\org\apache\jsp\validate_jsp.java:113: cannot resolve symbol

symbol  : method getSignatureInfoEx ()

location: interface com.adobe.document.pdf.SignatureField

     sigInfo = sigFieldList[i].getSignatureInfoEx();

What could be the cause of the issue?



Thanks,



--Ben