# getDocumentType method

String getDocumentType()

Gets the the document type identification code. For AFNOR XP Z42-101 only.

return The document type identification code. For AFNOR XP Z42-101 only. throws BiosealException An error has occurred during Bioseal Library execution.

## Implementation

    String getDocumentType() {
      Pointer<Char> pDocumentType = nullptr;
      Pointer<Int> pDocumentTypeSize = calloc.allocate(1);
      pDocumentTypeSize[0] = -1;
      try {
        var err = biosealSDK.id3Bioseal_GetDocumentType(_pHandle.value, pDocumentType, pDocumentTypeSize);
        if (err == BiosealError.insufficientBuffer.value) {
          pDocumentType = calloc.allocate(pDocumentTypeSize.value);
          err = biosealSDK.id3Bioseal_GetDocumentType(_pHandle.value, pDocumentType, pDocumentTypeSize);
          if (err != BiosealError.success.value) {
            throw BiosealException(err);
          }
        }
        final vDocumentType = utf8.decode(Uint8List.fromList(pDocumentType.cast<Uint8>().asTypedList(pDocumentTypeSize.value)));
        return vDocumentType;
      } finally {
        calloc.free(pDocumentType);
        calloc.free(pDocumentTypeSize);
      }
    }