From dfaf2af5cc4d32b30a5e6b6f71a0d99c067047f3 Mon Sep 17 00:00:00 2001
From: Andreas Stefl <stefl.andreas@gmail.com>
Date: Mon, 13 Oct 2025 22:19:24 +0200
Subject: [PATCH] add is_decodable to files

---
 src/odr/exceptions.cpp                              |  6 ++++++
 src/odr/exceptions.hpp                              | 10 ++++++++++
 src/odr/file.cpp                                    |  4 ++++
 src/odr/file.hpp                                    |  2 ++
 src/odr/internal/abstract/file.hpp                  |  2 ++
 src/odr/internal/cfb/cfb_file.cpp                   |  2 ++
 src/odr/internal/cfb/cfb_file.hpp                   |  2 ++
 src/odr/internal/common/image_file.cpp              |  8 +++++++-
 src/odr/internal/common/image_file.hpp              |  2 ++
 src/odr/internal/csv/csv_file.cpp                   |  2 ++
 src/odr/internal/csv/csv_file.hpp                   |  2 ++
 src/odr/internal/json/json_file.cpp                 |  2 ++
 src/odr/internal/json/json_file.hpp                 |  2 ++
 src/odr/internal/odf/odf_file.cpp                   | 11 +++++++++--
 src/odr/internal/odf/odf_file.hpp                   |  2 ++
 src/odr/internal/oldms/oldms_file.cpp               |  4 +++-
 src/odr/internal/oldms/oldms_file.hpp               |  2 ++
 src/odr/internal/oldms_wvware/wvware_oldms_file.cpp |  4 +++-
 src/odr/internal/oldms_wvware/wvware_oldms_file.hpp |  2 ++
 src/odr/internal/ooxml/ooxml_file.cpp               | 11 +++++++++--
 src/odr/internal/ooxml/ooxml_file.hpp               |  2 ++
 src/odr/internal/pdf/pdf_file.cpp                   |  2 ++
 src/odr/internal/pdf/pdf_file.hpp                   |  2 ++
 src/odr/internal/pdf_poppler/poppler_pdf_file.cpp   |  2 ++
 src/odr/internal/pdf_poppler/poppler_pdf_file.hpp   |  2 ++
 src/odr/internal/svm/svm_file.cpp                   |  8 +++++++-
 src/odr/internal/svm/svm_file.hpp                   |  2 ++
 src/odr/internal/text/text_file.cpp                 |  2 ++
 src/odr/internal/text/text_file.hpp                 |  2 ++
 src/odr/internal/zip/zip_file.cpp                   |  2 ++
 src/odr/internal/zip/zip_file.hpp                   |  2 ++
 31 files changed, 102 insertions(+), 8 deletions(-)

diff --git a/src/odr/exceptions.cpp b/src/odr/exceptions.cpp
index 77b0fd8a6..a382ca202 100644
--- a/src/odr/exceptions.cpp
+++ b/src/odr/exceptions.cpp
@@ -129,4 +129,10 @@ NotEncryptedError::NotEncryptedError()
 InvalidPath::InvalidPath(const std::string &message)
     : std::runtime_error("invalid path: " + message) {}
 
+UnsupportedFileEncoding::UnsupportedFileEncoding(const std::string &message)
+    : std::runtime_error("unsupported file encoding: " + message) {}
+
+FileEncryptedError::FileEncryptedError()
+    : std::runtime_error("file encrypted error") {}
+
 } // namespace odr
diff --git a/src/odr/exceptions.hpp b/src/odr/exceptions.hpp
index 9bbb29f1f..54704e910 100644
--- a/src/odr/exceptions.hpp
+++ b/src/odr/exceptions.hpp
@@ -220,4 +220,14 @@ struct InvalidPath final : std::runtime_error {
   explicit InvalidPath(const std::string &message);
 };
 
+/// @brief Unsupported file encoding
+struct UnsupportedFileEncoding final : std::runtime_error {
+  explicit UnsupportedFileEncoding(const std::string &message);
+};
+
+/// @brief File is encrypted
+struct FileEncryptedError final : std::runtime_error {
+  explicit FileEncryptedError();
+};
+
 } // namespace odr
diff --git a/src/odr/file.cpp b/src/odr/file.cpp
index 43b650878..b598b8123 100644
--- a/src/odr/file.cpp
+++ b/src/odr/file.cpp
@@ -125,6 +125,10 @@ DecodedFile DecodedFile::decrypt(const std::string &password) const {
   return DecodedFile(m_impl->decrypt(password));
 }
 
+bool DecodedFile::is_decodable() const noexcept {
+  return m_impl->is_decodable();
+}
+
 bool DecodedFile::is_text_file() const {
   return std::dynamic_pointer_cast<internal::abstract::TextFile>(m_impl) !=
          nullptr;
diff --git a/src/odr/file.hpp b/src/odr/file.hpp
index 64fd76457..37c1f14ab 100644
--- a/src/odr/file.hpp
+++ b/src/odr/file.hpp
@@ -200,6 +200,8 @@ class DecodedFile {
   [[nodiscard]] EncryptionState encryption_state() const;
   [[nodiscard]] DecodedFile decrypt(const std::string &password) const;
 
+  [[nodiscard]] bool is_decodable() const noexcept;
+
   [[nodiscard]] bool is_text_file() const;
   [[nodiscard]] bool is_image_file() const;
   [[nodiscard]] bool is_archive_file() const;
diff --git a/src/odr/internal/abstract/file.hpp b/src/odr/internal/abstract/file.hpp
index 9f25783e6..9906fb69e 100644
--- a/src/odr/internal/abstract/file.hpp
+++ b/src/odr/internal/abstract/file.hpp
@@ -50,6 +50,8 @@ class DecodedFile {
     (void)password;
     return nullptr;
   }
+
+  [[nodiscard]] virtual bool is_decodable() const noexcept = 0;
 };
 
 class TextFile : public DecodedFile {
diff --git a/src/odr/internal/cfb/cfb_file.cpp b/src/odr/internal/cfb/cfb_file.cpp
index 896aa026f..0e9677793 100644
--- a/src/odr/internal/cfb/cfb_file.cpp
+++ b/src/odr/internal/cfb/cfb_file.cpp
@@ -26,6 +26,8 @@ DecoderEngine CfbFile::decoder_engine() const noexcept {
   return DecoderEngine::odr;
 }
 
+bool CfbFile::is_decodable() const noexcept { return true; }
+
 std::shared_ptr<abstract::Archive> CfbFile::archive() const {
   return std::make_shared<CfbArchive>(m_cfb);
 }
diff --git a/src/odr/internal/cfb/cfb_file.hpp b/src/odr/internal/cfb/cfb_file.hpp
index a6fab7c26..14300105c 100644
--- a/src/odr/internal/cfb/cfb_file.hpp
+++ b/src/odr/internal/cfb/cfb_file.hpp
@@ -27,6 +27,8 @@ class CfbFile final : public abstract::ArchiveFile {
   [[nodiscard]] FileMeta file_meta() const noexcept override;
   [[nodiscard]] DecoderEngine decoder_engine() const noexcept override;
 
+  [[nodiscard]] bool is_decodable() const noexcept override;
+
   [[nodiscard]] std::shared_ptr<abstract::Archive> archive() const override;
 
 private:
diff --git a/src/odr/internal/common/image_file.cpp b/src/odr/internal/common/image_file.cpp
index 9cc751bad..475c015ec 100644
--- a/src/odr/internal/common/image_file.cpp
+++ b/src/odr/internal/common/image_file.cpp
@@ -1,5 +1,7 @@
 #include <odr/internal/common/image_file.hpp>
 
+#include <odr/exceptions.hpp>
+
 namespace odr::internal {
 
 ImageFile::ImageFile(std::shared_ptr<abstract::File> file,
@@ -18,6 +20,10 @@ DecoderEngine ImageFile::decoder_engine() const noexcept {
   return DecoderEngine::odr;
 }
 
-std::shared_ptr<abstract::Image> ImageFile::image() const { return {}; }
+bool ImageFile::is_decodable() const noexcept { return false; }
+
+std::shared_ptr<abstract::Image> ImageFile::image() const {
+  throw UnsupportedFileEncoding("generally unsupported");
+}
 
 } // namespace odr::internal
diff --git a/src/odr/internal/common/image_file.hpp b/src/odr/internal/common/image_file.hpp
index 0c0c84c32..87a7b8178 100644
--- a/src/odr/internal/common/image_file.hpp
+++ b/src/odr/internal/common/image_file.hpp
@@ -14,6 +14,8 @@ class ImageFile final : public abstract::ImageFile {
   [[nodiscard]] FileMeta file_meta() const noexcept override;
   [[nodiscard]] DecoderEngine decoder_engine() const noexcept override;
 
+  [[nodiscard]] bool is_decodable() const noexcept override;
+
   [[nodiscard]] std::shared_ptr<abstract::Image> image() const override;
 
 private:
diff --git a/src/odr/internal/csv/csv_file.cpp b/src/odr/internal/csv/csv_file.cpp
index 981b06317..82c61e18f 100644
--- a/src/odr/internal/csv/csv_file.cpp
+++ b/src/odr/internal/csv/csv_file.cpp
@@ -28,4 +28,6 @@ DecoderEngine CsvFile::decoder_engine() const noexcept {
   return DecoderEngine::odr;
 }
 
+bool CsvFile::is_decodable() const noexcept { return false; }
+
 } // namespace odr::internal::csv
diff --git a/src/odr/internal/csv/csv_file.hpp b/src/odr/internal/csv/csv_file.hpp
index b8c91762c..838af7b94 100644
--- a/src/odr/internal/csv/csv_file.hpp
+++ b/src/odr/internal/csv/csv_file.hpp
@@ -18,6 +18,8 @@ class CsvFile final : public abstract::TextFile {
   [[nodiscard]] FileMeta file_meta() const noexcept override;
   [[nodiscard]] DecoderEngine decoder_engine() const noexcept override;
 
+  [[nodiscard]] bool is_decodable() const noexcept override;
+
 private:
   std::shared_ptr<text::TextFile> m_file;
   std::string m_charset;
diff --git a/src/odr/internal/json/json_file.cpp b/src/odr/internal/json/json_file.cpp
index cfe2d3bc4..76dbbaaf7 100644
--- a/src/odr/internal/json/json_file.cpp
+++ b/src/odr/internal/json/json_file.cpp
@@ -28,4 +28,6 @@ DecoderEngine JsonFile::decoder_engine() const noexcept {
   return DecoderEngine::odr;
 }
 
+bool JsonFile::is_decodable() const noexcept { return false; }
+
 } // namespace odr::internal::json
diff --git a/src/odr/internal/json/json_file.hpp b/src/odr/internal/json/json_file.hpp
index 6f0510173..5a7c4c973 100644
--- a/src/odr/internal/json/json_file.hpp
+++ b/src/odr/internal/json/json_file.hpp
@@ -18,6 +18,8 @@ class JsonFile final : public abstract::TextFile {
   [[nodiscard]] FileMeta file_meta() const noexcept override;
   [[nodiscard]] DecoderEngine decoder_engine() const noexcept override;
 
+  [[nodiscard]] bool is_decodable() const noexcept override;
+
 private:
   std::shared_ptr<text::TextFile> m_file;
   std::string m_charset;
diff --git a/src/odr/internal/odf/odf_file.cpp b/src/odr/internal/odf/odf_file.cpp
index 022cd98d2..f1fbfa148 100644
--- a/src/odr/internal/odf/odf_file.cpp
+++ b/src/odr/internal/odf/odf_file.cpp
@@ -77,8 +77,15 @@ OpenDocumentFile::decrypt(const std::string &password) const {
   return decrypted_file;
 }
 
+bool OpenDocumentFile::is_decodable() const noexcept {
+  return m_encryption_state != EncryptionState::encrypted;
+}
+
 std::shared_ptr<abstract::Document> OpenDocumentFile::document() const {
-  // TODO throw if encrypted
+  if (m_encryption_state == EncryptionState::encrypted) {
+    throw FileEncryptedError();
+  }
+
   switch (file_type()) {
   case FileType::opendocument_text:
     return std::make_shared<Document>(m_file_meta.type, DocumentType::text,
@@ -93,7 +100,7 @@ std::shared_ptr<abstract::Document> OpenDocumentFile::document() const {
     return std::make_shared<Document>(m_file_meta.type, DocumentType::drawing,
                                       m_filesystem);
   default:
-    throw UnsupportedOperation();
+    throw UnsupportedFileType(file_type());
   }
 }
 
diff --git a/src/odr/internal/odf/odf_file.hpp b/src/odr/internal/odf/odf_file.hpp
index 99db21696..d2075a84c 100644
--- a/src/odr/internal/odf/odf_file.hpp
+++ b/src/odr/internal/odf/odf_file.hpp
@@ -37,6 +37,8 @@ class OpenDocumentFile final : public virtual abstract::DocumentFile {
   [[nodiscard]] std::shared_ptr<DecodedFile>
   decrypt(const std::string &password) const override;
 
+  [[nodiscard]] bool is_decodable() const noexcept override;
+
   [[nodiscard]] std::shared_ptr<abstract::Document> document() const override;
 
 private:
diff --git a/src/odr/internal/oldms/oldms_file.cpp b/src/odr/internal/oldms/oldms_file.cpp
index 77c85d6f6..75bd15130 100644
--- a/src/odr/internal/oldms/oldms_file.cpp
+++ b/src/odr/internal/oldms/oldms_file.cpp
@@ -84,8 +84,10 @@ LegacyMicrosoftFile::decrypt(const std::string &password) const {
       "odrcore does not support decryption of legacy Microsoft files");
 }
 
+bool LegacyMicrosoftFile::is_decodable() const noexcept { return false; }
+
 std::shared_ptr<abstract::Document> LegacyMicrosoftFile::document() const {
-  throw UnsupportedOperation(
+  throw UnsupportedFileEncoding(
       "odrcore does not support reading legacy Microsoft files");
 }
 
diff --git a/src/odr/internal/oldms/oldms_file.hpp b/src/odr/internal/oldms/oldms_file.hpp
index d79ada6d6..0206f084e 100644
--- a/src/odr/internal/oldms/oldms_file.hpp
+++ b/src/odr/internal/oldms/oldms_file.hpp
@@ -34,6 +34,8 @@ class LegacyMicrosoftFile final : public abstract::DocumentFile {
   [[nodiscard]] std::shared_ptr<DecodedFile>
   decrypt(const std::string &password) const override;
 
+  [[nodiscard]] bool is_decodable() const noexcept override;
+
   [[nodiscard]] std::shared_ptr<abstract::Document> document() const override;
 
 private:
diff --git a/src/odr/internal/oldms_wvware/wvware_oldms_file.cpp b/src/odr/internal/oldms_wvware/wvware_oldms_file.cpp
index fb963bd39..f5f813b86 100644
--- a/src/odr/internal/oldms_wvware/wvware_oldms_file.cpp
+++ b/src/odr/internal/oldms_wvware/wvware_oldms_file.cpp
@@ -136,9 +136,11 @@ WvWareLegacyMicrosoftFile::decrypt(const std::string &password) const {
   return decrypted;
 }
 
+bool WvWareLegacyMicrosoftFile::is_decodable() const noexcept { return false; }
+
 std::shared_ptr<abstract::Document>
 WvWareLegacyMicrosoftFile::document() const {
-  return {}; // TODO throw
+  throw UnsupportedFileEncoding("generally unsupported");
 }
 
 wvParseStruct &WvWareLegacyMicrosoftFile::parse_struct() const {
diff --git a/src/odr/internal/oldms_wvware/wvware_oldms_file.hpp b/src/odr/internal/oldms_wvware/wvware_oldms_file.hpp
index 191e70055..ea183036b 100644
--- a/src/odr/internal/oldms_wvware/wvware_oldms_file.hpp
+++ b/src/odr/internal/oldms_wvware/wvware_oldms_file.hpp
@@ -35,6 +35,8 @@ class WvWareLegacyMicrosoftFile final : public abstract::DocumentFile {
   [[nodiscard]] std::shared_ptr<DecodedFile>
   decrypt(const std::string &password) const override;
 
+  [[nodiscard]] bool is_decodable() const noexcept override;
+
   [[nodiscard]] std::shared_ptr<abstract::Document> document() const override;
 
   [[nodiscard]] wvParseStruct &parse_struct() const;
diff --git a/src/odr/internal/ooxml/ooxml_file.cpp b/src/odr/internal/ooxml/ooxml_file.cpp
index b4489aa47..52cff006f 100644
--- a/src/odr/internal/ooxml/ooxml_file.cpp
+++ b/src/odr/internal/ooxml/ooxml_file.cpp
@@ -84,8 +84,15 @@ OfficeOpenXmlFile::decrypt(const std::string &password) const {
   return decrypted;
 }
 
+bool OfficeOpenXmlFile::is_decodable() const noexcept {
+  return m_encryption_state != EncryptionState::encrypted;
+}
+
 std::shared_ptr<abstract::Document> OfficeOpenXmlFile::document() const {
-  // TODO throw if encrypted
+  if (m_encryption_state == EncryptionState::encrypted) {
+    throw FileEncryptedError();
+  }
+
   switch (file_type()) {
   case FileType::office_open_xml_document:
     return std::make_shared<text::Document>(m_filesystem);
@@ -94,7 +101,7 @@ std::shared_ptr<abstract::Document> OfficeOpenXmlFile::document() const {
   case FileType::office_open_xml_workbook:
     return std::make_shared<spreadsheet::Document>(m_filesystem);
   default:
-    throw UnsupportedOperation();
+    throw UnsupportedFileType(file_type());
   }
 }
 
diff --git a/src/odr/internal/ooxml/ooxml_file.hpp b/src/odr/internal/ooxml/ooxml_file.hpp
index 13b123fab..77fe81295 100644
--- a/src/odr/internal/ooxml/ooxml_file.hpp
+++ b/src/odr/internal/ooxml/ooxml_file.hpp
@@ -36,6 +36,8 @@ class OfficeOpenXmlFile final : public abstract::DocumentFile {
   [[nodiscard]] std::shared_ptr<DecodedFile>
   decrypt(const std::string &password) const override;
 
+  [[nodiscard]] bool is_decodable() const noexcept override;
+
   [[nodiscard]] std::shared_ptr<abstract::Document> document() const override;
 
 private:
diff --git a/src/odr/internal/pdf/pdf_file.cpp b/src/odr/internal/pdf/pdf_file.cpp
index 7ad8efbe9..44eb8572e 100644
--- a/src/odr/internal/pdf/pdf_file.cpp
+++ b/src/odr/internal/pdf/pdf_file.cpp
@@ -29,4 +29,6 @@ PdfFile::decrypt(const std::string &password) const {
   return nullptr;
 }
 
+bool PdfFile::is_decodable() const noexcept { return false; }
+
 } // namespace odr::internal
diff --git a/src/odr/internal/pdf/pdf_file.hpp b/src/odr/internal/pdf/pdf_file.hpp
index 4b3605dd5..02d4d77dc 100644
--- a/src/odr/internal/pdf/pdf_file.hpp
+++ b/src/odr/internal/pdf/pdf_file.hpp
@@ -18,6 +18,8 @@ class PdfFile final : public abstract::PdfFile {
   [[nodiscard]] std::shared_ptr<DecodedFile>
   decrypt(const std::string &password) const override;
 
+  [[nodiscard]] bool is_decodable() const noexcept override;
+
 private:
   std::shared_ptr<abstract::File> m_file;
   FileMeta m_file_meta;
diff --git a/src/odr/internal/pdf_poppler/poppler_pdf_file.cpp b/src/odr/internal/pdf_poppler/poppler_pdf_file.cpp
index 87b14aa8a..51c8c957a 100644
--- a/src/odr/internal/pdf_poppler/poppler_pdf_file.cpp
+++ b/src/odr/internal/pdf_poppler/poppler_pdf_file.cpp
@@ -98,6 +98,8 @@ PopplerPdfFile::decrypt(const std::string &password) const {
   return decrypted_file;
 }
 
+bool PopplerPdfFile::is_decodable() const noexcept { return false; }
+
 PDFDoc &PopplerPdfFile::pdf_doc() const { return *m_pdf_doc; }
 
 } // namespace odr::internal
diff --git a/src/odr/internal/pdf_poppler/poppler_pdf_file.hpp b/src/odr/internal/pdf_poppler/poppler_pdf_file.hpp
index 6d393f98a..c30163578 100644
--- a/src/odr/internal/pdf_poppler/poppler_pdf_file.hpp
+++ b/src/odr/internal/pdf_poppler/poppler_pdf_file.hpp
@@ -23,6 +23,8 @@ class PopplerPdfFile final : public abstract::PdfFile {
   [[nodiscard]] std::shared_ptr<DecodedFile>
   decrypt(const std::string &password) const override;
 
+  [[nodiscard]] bool is_decodable() const noexcept override;
+
   [[nodiscard]] PDFDoc &pdf_doc() const;
 
 private:
diff --git a/src/odr/internal/svm/svm_file.cpp b/src/odr/internal/svm/svm_file.cpp
index 72b64e768..c82b4e727 100644
--- a/src/odr/internal/svm/svm_file.cpp
+++ b/src/odr/internal/svm/svm_file.cpp
@@ -1,3 +1,5 @@
+#include <odr/exceptions.hpp>
+
 #include <odr/internal/svm/svm_file.hpp>
 
 #include <odr/internal/svm/svm_format.hpp>
@@ -35,6 +37,10 @@ DecoderEngine SvmFile::decoder_engine() const noexcept {
   return DecoderEngine::odr;
 }
 
-std::shared_ptr<abstract::Image> SvmFile::image() const { return {}; }
+bool SvmFile::is_decodable() const noexcept { return false; }
+
+std::shared_ptr<abstract::Image> SvmFile::image() const {
+  throw UnsupportedFileEncoding("generally unsupported");
+}
 
 } // namespace odr::internal::svm
diff --git a/src/odr/internal/svm/svm_file.hpp b/src/odr/internal/svm/svm_file.hpp
index ab89673b6..6d033c00c 100644
--- a/src/odr/internal/svm/svm_file.hpp
+++ b/src/odr/internal/svm/svm_file.hpp
@@ -21,6 +21,8 @@ class SvmFile final : public abstract::ImageFile {
   [[nodiscard]] FileMeta file_meta() const noexcept override;
   [[nodiscard]] DecoderEngine decoder_engine() const noexcept override;
 
+  [[nodiscard]] bool is_decodable() const noexcept override;
+
   [[nodiscard]] std::shared_ptr<abstract::Image> image() const override;
 
 private:
diff --git a/src/odr/internal/text/text_file.cpp b/src/odr/internal/text/text_file.cpp
index c5db55030..433379830 100644
--- a/src/odr/internal/text/text_file.cpp
+++ b/src/odr/internal/text/text_file.cpp
@@ -26,4 +26,6 @@ DecoderEngine TextFile::decoder_engine() const noexcept {
   return DecoderEngine::odr;
 }
 
+bool TextFile::is_decodable() const noexcept { return false; }
+
 } // namespace odr::internal::text
diff --git a/src/odr/internal/text/text_file.hpp b/src/odr/internal/text/text_file.hpp
index 2284ea244..7361dec50 100644
--- a/src/odr/internal/text/text_file.hpp
+++ b/src/odr/internal/text/text_file.hpp
@@ -19,6 +19,8 @@ class TextFile final : public abstract::TextFile {
   [[nodiscard]] FileMeta file_meta() const noexcept override;
   [[nodiscard]] DecoderEngine decoder_engine() const noexcept override;
 
+  [[nodiscard]] bool is_decodable() const noexcept override;
+
 private:
   std::shared_ptr<abstract::File> m_file;
   std::string m_charset;
diff --git a/src/odr/internal/zip/zip_file.cpp b/src/odr/internal/zip/zip_file.cpp
index 47e3478f3..dc0f82d1f 100644
--- a/src/odr/internal/zip/zip_file.cpp
+++ b/src/odr/internal/zip/zip_file.cpp
@@ -27,6 +27,8 @@ DecoderEngine ZipFile::decoder_engine() const noexcept {
   return DecoderEngine::odr;
 }
 
+bool ZipFile::is_decodable() const noexcept { return true; }
+
 std::shared_ptr<abstract::Archive> ZipFile::archive() const {
   return std::make_shared<ZipArchive>(m_zip);
 }
diff --git a/src/odr/internal/zip/zip_file.hpp b/src/odr/internal/zip/zip_file.hpp
index acfda0a05..5755d3cdc 100644
--- a/src/odr/internal/zip/zip_file.hpp
+++ b/src/odr/internal/zip/zip_file.hpp
@@ -28,6 +28,8 @@ class ZipFile final : public abstract::ArchiveFile {
   [[nodiscard]] FileMeta file_meta() const noexcept override;
   [[nodiscard]] DecoderEngine decoder_engine() const noexcept override;
 
+  [[nodiscard]] bool is_decodable() const noexcept override;
+
   [[nodiscard]] std::shared_ptr<abstract::Archive> archive() const override;
 
 private: