# getDocumentName method

String getDocumentName(

1. String? language

)

Gets the name of the document.

param language The expected language. return The name of the document. throws BiosealException An error has occurred during Bioseal Library execution.

## Implementation

    String getDocumentName(String? language) {
      Pointer<Char>? pLanguage = language?.toNativeUtf8().cast<Char>();
      Pointer<Char> pDocumentName = nullptr;
      Pointer<Int> pDocumentNameSize = calloc.allocate(1);
      pDocumentNameSize[0] = -1;
      try {
        var err = biosealSDK.id3BiosealManifest_GetDocumentName(_pHandle.value, pLanguage ?? nullptr, pDocumentName, pDocumentNameSize);
        if (err == BiosealError.insufficientBuffer.value) {
          pDocumentName = calloc.allocate(pDocumentNameSize.value);
          err = biosealSDK.id3BiosealManifest_GetDocumentName(_pHandle.value, pLanguage ?? nullptr, pDocumentName, pDocumentNameSize);
          if (err != BiosealError.success.value) {
            throw BiosealException(err);
          }
        }
        final vDocumentName = utf8.decode(Uint8List.fromList(pDocumentName.cast<Uint8>().asTypedList(pDocumentNameSize.value)));
        return vDocumentName;
      } finally {
        if (pLanguage != null) {
          calloc.free(pLanguage);
        }
        calloc.free(pDocumentName);
        calloc.free(pDocumentNameSize);
      }
    }