private static List tryReadFromFile()

in src/main/java/org/jetbrains/nativecerts/linux/LinuxTrustedCertificatesUtil.java [89:124]

30 lines of code
7 McCabe index (conditional complexity)


    private static List<X509Certificate> tryReadFromFile(@NotNull Path file) {
        try {
            if (!Files.exists(file)) {
                LOGGER.fine("Not reading certificates from " + file + ": file does not exist");
                return Collections.emptyList();
            }

            if (!Files.isRegularFile(file)) {
                LOGGER.warning("Not reading certificates from " + file + ": not a regular file");
                return Collections.emptyList();
            }

            try (InputStream stream = Files.newInputStream(file)) {
                List<X509Certificate> list = PemReaderUtil.readPemBundle(stream, file.toString());

                if (LOGGER.isLoggable(Level.FINE)) {
                    StringBuilder message = new StringBuilder();
                    message.append("Received ").append(list.size()).append(" certificates from ").append(file);

                    for (X509Certificate certificate : list) {
                        message.append("\n  ").append(certificate.getSubjectDN());
                    }

                    LOGGER.fine(message.toString());
                }

                return list;
            }
        } catch (AccessDeniedException t) {
            LOGGER.warning("Not reading certificates from " + file + ": access denied");
            return Collections.emptyList();
        } catch (Throwable t) {
            LOGGER.warning(renderExceptionMessage("Unable to read certificates from " + file, t));
            return Collections.emptyList();
        }
    }