package at.gv.egiz.pdfas.utils;

import at.gv.egiz.pdfas.exceptions.ErrorCode;
import at.knowcenter.wag.egov.egiz.exceptions.PDFDocumentException;

import com.lowagie.text.pdf.PdfReader;

/**
 * @author tknall
 */
public class PDFASUtils {
   
   private PDFASUtils() {
   }
   
   /**
    * Verifies that a document could be opened with full permissions. 
    * @param pdfReader The PdfReader
    * @throws PDFDocumentException Thrown if document has not been opened with full permissions.
    */
   public static void checkReaderPermissions(PdfReader pdfReader) throws PDFDocumentException {
      if (pdfReader.isEncrypted()) {
         throw new PDFDocumentException(ErrorCode.DOCUMENT_IS_PROTECTED, "Document is encrypted.");
      }
      if (!pdfReader.isOpenedWithFullPermissions()) {
         throw new PDFDocumentException(ErrorCode.DOCUMENT_IS_PROTECTED, "Document is protected.");
      }
   }
   
}