C# IJsonSerializer.DeserializeFromFile方法代码示例

        public ImageProcessor(ILogger logger, IServerApplicationPaths appPaths, IFileSystem fileSystem, IJsonSerializer jsonSerializer)
        {
            _logger = logger;
            _fileSystem = fileSystem;
            _jsonSerializer = jsonSerializer;
            _appPaths = appPaths;

            _saveImageSizeTimer = new Timer(SaveImageSizeCallback, null, Timeout.Infinite, Timeout.Infinite);

            Dictionary<Guid, ImageSize> sizeDictionary;

            try
            {
                sizeDictionary = jsonSerializer.DeserializeFromFile<Dictionary<Guid, ImageSize>>(ImageSizeFile) ?? 
                    new Dictionary<Guid, ImageSize>();
            }
            catch (FileNotFoundException)
            {
                // No biggie
                sizeDictionary = new Dictionary<Guid, ImageSize>();
            }
            catch (Exception ex)
            {
                logger.ErrorException("Error parsing image size cache file", ex);

                sizeDictionary = new Dictionary<Guid, ImageSize>();
            }

            _cachedImagedSizes = new ConcurrentDictionary<Guid, ImageSize>(sizeDictionary);
        }

        public ImageProcessor(ILogger logger,
            IServerApplicationPaths appPaths,
            IFileSystem fileSystem,
            IJsonSerializer jsonSerializer,
            IImageEncoder imageEncoder,
            int maxConcurrentImageProcesses, Func<ILibraryManager> libraryManager)
        {
            _logger = logger;
            _fileSystem = fileSystem;
            _jsonSerializer = jsonSerializer;
            _imageEncoder = imageEncoder;
            _libraryManager = libraryManager;
            _appPaths = appPaths;

            ImageEnhancers = new List<IImageEnhancer>();
            _saveImageSizeTimer = new Timer(SaveImageSizeCallback, null, Timeout.Infinite, Timeout.Infinite);

            Dictionary<Guid, ImageSize> sizeDictionary;

            try
            {
                sizeDictionary = jsonSerializer.DeserializeFromFile<Dictionary<Guid, ImageSize>>(ImageSizeFile) ??
                    new Dictionary<Guid, ImageSize>();
            }
            catch (FileNotFoundException)
            {
                // No biggie
                sizeDictionary = new Dictionary<Guid, ImageSize>();
            }
            catch (DirectoryNotFoundException)
            {
                // No biggie
                sizeDictionary = new Dictionary<Guid, ImageSize>();
            }
            catch (Exception ex)
            {
                logger.ErrorException("Error parsing image size cache file", ex);

                sizeDictionary = new Dictionary<Guid, ImageSize>();
            }

            _cachedImagedSizes = new ConcurrentDictionary<Guid, ImageSize>(sizeDictionary);
            _logger.Info("ImageProcessor started with {0} max concurrent image processes", maxConcurrentImageProcesses);
            _imageProcessingSemaphore = new SemaphoreSlim(maxConcurrentImageProcesses, maxConcurrentImageProcesses);
        }

        /// <summary>
        /// Fetches the images.
        /// </summary>
        /// <param name="item">The item.</param>
        /// <param name="language">The language.</param>
        /// <param name="jsonSerializer">The json serializer.</param>
        /// <param name="cancellationToken">The cancellation token.</param>
        /// <returns>Task{MovieImages}.</returns>
        private async Task<MovieDbSeriesProvider.Images> FetchImages(BaseItem item, string language, IJsonSerializer jsonSerializer,
            CancellationToken cancellationToken)
        {
            var tmdbId = item.GetProviderId(MetadataProviders.Tmdb);

            if (string.IsNullOrEmpty(tmdbId))
            {
                return null;
            }

            await MovieDbSeriesProvider.Current.EnsureSeriesInfo(tmdbId, language, cancellationToken).ConfigureAwait(false);

            var path = MovieDbSeriesProvider.Current.GetDataFilePath(tmdbId, language);

            if (!string.IsNullOrEmpty(path))
            {
                var fileInfo = new FileInfo(path);

                if (fileInfo.Exists)
                {
                    return jsonSerializer.DeserializeFromFile<MovieDbSeriesProvider.RootObject>(path).images;
                }
            }

            return null;
        }

        /// <summary>
        /// Fetches the images.
        /// </summary>
        /// <param name="item">The item.</param>
        /// <param name="jsonSerializer">The json serializer.</param>
        /// <param name="cancellationToken">The cancellation token.</param>
        /// <returns>Task{MovieImages}.</returns>
        private async Task<MovieDbProvider.Images> FetchImages(BaseItem item, IJsonSerializer jsonSerializer,
            CancellationToken cancellationToken)
        {
            await MovieDbProvider.Current.EnsureMovieInfo(item, cancellationToken).ConfigureAwait(false);

            var path = MovieDbProvider.Current.GetDataFilePath(item);

            if (!string.IsNullOrEmpty(path))
            {
                var fileInfo = new FileInfo(path);

                if (fileInfo.Exists)
                {
                    return jsonSerializer.DeserializeFromFile<MovieDbProvider.CompleteMovieData>(path).images;
                }
            }

            return null;
        }

        /// <summary>
        /// Fetches the images.
        /// </summary>
        /// <param name="item">The item.</param>
        /// <param name="language">The language.</param>
        /// <param name="jsonSerializer">The json serializer.</param>
        /// <param name="cancellationToken">The cancellation token.</param>
        /// <returns>Task{MovieImages}.</returns>
        private async Task<MovieDbProvider.Images> FetchImages(BaseItem item, string language, IJsonSerializer jsonSerializer, CancellationToken cancellationToken)
        {
            var tmdbId = item.GetProviderId(MetadataProviders.Tmdb);

            if (string.IsNullOrWhiteSpace(tmdbId))
            {
                var imdbId = item.GetProviderId(MetadataProviders.Imdb);
                if (!string.IsNullOrWhiteSpace(imdbId))
                {
                    var movieInfo = await MovieDbProvider.Current.FetchMainResult(imdbId, false, language, cancellationToken).ConfigureAwait(false);
                    if (movieInfo != null)
                    {
                        tmdbId = movieInfo.id.ToString(CultureInfo.InvariantCulture);
                    }
                }
            }

            if (string.IsNullOrWhiteSpace(tmdbId))
            {
                return null;
            }

            await MovieDbProvider.Current.EnsureMovieInfo(tmdbId, language, cancellationToken).ConfigureAwait(false);

            var path = MovieDbProvider.Current.GetDataFilePath(tmdbId, language);

            if (!string.IsNullOrEmpty(path))
            {
                var fileInfo = new FileInfo(path);

                if (fileInfo.Exists)
                {
                    return jsonSerializer.DeserializeFromFile<MovieDbProvider.CompleteMovieData>(path).images;
                }
            }

            return null;
        }

        /// <summary>
        /// Find and reads a chutzpah test settings file given a direcotry. If none is found a default settings object is created
        /// </summary>
        /// <param name="directory"></param>
        /// <param name="fileProbe"></param>
        /// <param name="serializer"></param>
        /// <returns></returns>
        public static ChutzpahTestSettingsFile Read(string directory, IFileProbe fileProbe, IJsonSerializer serializer)
        {
            if (string.IsNullOrEmpty(directory)) return new ChutzpahTestSettingsFile();

            directory = directory.TrimEnd('/', '\\');

            ChutzpahTestSettingsFile settings;
            if (!ChutzpahSettingsFileCache.TryGetValue(directory, out settings))
            {
                var testSettingsFilePath = fileProbe.FindTestSettingsFile(directory);
                if(string.IsNullOrEmpty(testSettingsFilePath))
                {
                    settings = new ChutzpahTestSettingsFile();
                }
                else if (!ChutzpahSettingsFileCache.TryGetValue(testSettingsFilePath, out settings))
                {
                    settings = serializer.DeserializeFromFile<ChutzpahTestSettingsFile>(testSettingsFilePath);
                    settings.SettingsFileDirectory = Path.GetDirectoryName(testSettingsFilePath);

                    ValidateTestHarnessLocationMode(settings, fileProbe);

                    // Add a mapping in the cache for the directory that contains the test settings file
                    ChutzpahSettingsFileCache.TryAdd(settings.SettingsFileDirectory, settings);
                }

                // Add mapping in the cache for the original directory tried to skip needing to traverse the tree again
                ChutzpahSettingsFileCache.TryAdd(directory, settings);
            }

            return settings;
        }

        /// <summary>
        /// Fetches the images.
        /// </summary>
        /// <param name="item">The item.</param>
        /// <param name="jsonSerializer">The json serializer.</param>
        /// <returns>Task{MovieImages}.</returns>
        private MovieDbProvider.Images FetchImages(BaseItem item, IJsonSerializer jsonSerializer)
        {
            var path = MovieDbProvider.Current.GetImagesDataFilePath(item);

            if (!string.IsNullOrEmpty(path))
            {
                var fileInfo = new FileInfo(path);

                if (fileInfo.Exists)
                {
                    return jsonSerializer.DeserializeFromFile<MovieDbProvider.CompleteMovieData>(path).images;
                }
            }

            return null;
        }