• Avalanche.Core
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    • Avalanche.Accessor
      • Introduction
      • IAccessor
        • IAccessor
        • IListAccessor
        • IMapAccessor
        • IRecordAccessor
        • IContentAccessor
        • IOneOfAccessor
        • IAnyAccessor
      • .Net
        • Introduction
        • IList<T>
        • IDictionary<K,V>
        • FieldInfo
        • OneOfAttribute
        • StructLayoutAttribute
        • Class
      • Protobuf
        • Introduction
      • Articles
        • Dependency Injection
        • AccessorMessages
    • Avalanche.Binding
      • Introduction
    • Avalanche.Core
      • License
    • Avalanche.DataType
      • Introduction
      • DataType
        • IDataType
        • IListType
        • IMapType
        • IRecordType
        • IFieldType
        • IOneOfType
        • IAnyType
        • IStringType
        • IValueType
        • IIntegerType
        • IEnumerationType
        • IRealType
      • .Net
        • Introduction
        • IList<T>
        • IDictionary<K,V>
        • FieldInfo
        • Enum
        • OneOfAttribute
        • StructLayoutAttribute
        • Class
      • Protobuf
        • Introduction
      • Articles
        • DataTypeRequest
        • PrintTree
        • DataTypeMessages
    • Avalanche.Emit
      • Introduction
      • TypeBuilder
      • ConstructorBuilder
      • MethodBuilder
      • PropertyBuilder
      • FieldBuilder
      • Emit
      • Utilities
    • Avalanche.FileSystem
      • Introduction
      • Abstractions
        • IFileSystem
          • IFileSystemBrowse
          • IFileSystemCreateDirectory
          • IFileSystemDelete
          • IFileSystemFileAttribute
          • IFileSystemMount
          • IFileSystemMove
          • IFileSystemObserve
          • IFileSystemOpen
        • IEvent
        • IEntry
        • IOption
        • IToken
      • FileSystem
      • VirtualFileSystem
      • MemoryFileSystem
      • EmbeddedFileSystem
      • HttpFileSystem
      • Decoration
      • IFileProvider
      • Events
      • Utilities
        • Dispose
        • File Scanner
        • Visit Tree
        • File Operation
    • Avalanche.Identity
      • Introduction
      • Identity
      • IdentityParts
      • IdentityInterner
      • IdentityComparer
      • Print Tree
      • IdentityAccessors
        • Introduction
        • TypeName
    • Avalanche.Localization
      • Introduction
      • Localization
      • LocalizationFile
      • LocalizationFiles
      • LocalizationFileSystem
      • LocalizationFileFormat
      • LocalizationLine
      • LocalizationLines
      • TemplateFormat
      • CultureProvider
      • FallbackCultureProvider
      • ResourceManager
      • LocalizationError
      • Microsoft.Extensions
        • Introduction
        • DependencyInjection
        • FileProvider
        • Logging
        • ITextLocalizer
        • IFileLocalizer
        • Localization
      • Asp.Net
        • Introduction
        • Supplying localization
        • Inject to pages
        • Culture Assigned
        • Minimalistic Api
        • Diagnostics
      • Pluralization
        • Introduction
        • Multiple plural parameters
        • Custom PluralRules
        • Invariant Culture
        • Unit Prefix
        • IPluralRule
        • IPluralNumber
        • IPluralRules
        • CLDRs
        • Unicode.CLDR40
        • Unicode.CLDR41
        • Unicode.CLDR42
      • Articles
        • Alphabet localization
        • Benchmarks
        • Caching
        • Class Library
        • Demo
        • Diagnostics
        • Embedded resources
        • Emplacement
        • File localization
        • Text localization
        • Printing templates
    • Avalanche.Message
      • Introduction
      • IMessage
      • IMessageProvider
      • IMessageDescription
      • IMessageDescriptions
      • MessageLevel
      • Message printing
      • Messages and Exceptions
      • Microsoft.Extensions
        • DependencyInjection
      • Articles
        • Aggregate Messages
        • Localization
        • Logging
        • Validation
    • Avalanche.Service
      • Introduction
      • Service
        • Introduction
        • IService
        • IServiceDisposable
        • IServiceDecoration
        • IServiceCast
        • IServiceObservable
        • IServiceContainer
        • Construction
        • Query
        • CancellationToken
        • CachePolicy
        • Scope
      • Handler
        • Introduction
        • IHandler
        • IHandlerCast
        • IHandlerDecoration
        • IHandlerWithOrder
        • CancellationToken
        • Cyclicity
        • Delegates
        • Invokable
        • ExportAttribute
        • OrderAttribute
        • PrintTree
        • Recursion
      • Query
        • Introduction
        • IQuery
        • IQueryCast
        • IQueryDecoration
      • Entry
        • Introduction
        • IEntry
        • IEntryCast
        • IEntryDecoration
        • IEntryObservable
        • IEntryVisitable
        • EntryState
      • Request
        • Introduction
        • IRequest
        • IRequestFor
        • IRequestToBeCached
        • IRequestToBeDisposed
        • RequestAttribute
        • ContextParameterAttribute
        • Print Tree
      • Dependency Injection
        • Introduction
        • Asp.Net
        • ServiceRequest<T>
        • Decorating a service
        • Handler
        • CachePolicy
        • CancellationToken
        • QueryLogger
      • Examples
        • NodeCount
        • Expression
        • Mapper
      • Articles
        • Benchmarks
        • Error Handling
        • ServiceMessages
    • Avalanche.StatusCode
      • Introduction
      • HResult
        • Introduction
        • HResult.Facilities
        • BasicMessages
        • RpcMessages
        • DispatchMessages
        • ItfMessages
        • Win32Messages
        • ClrMessages
      • System
        • Introduction
        • AccessControlMessages
        • AggregateMessages
        • AppDomainMessages
        • ArgumentMessages
        • ArgumentNullMessages
        • ArgumentOutOfRangeMessages
        • ArithmeticMessages
        • ArrayMessages
        • AssemblyMessages
        • BadImageFormatMessages
        • CodeContractMessages
        • CodePageMessages
        • CollectionsMessages
        • CompilerServiceMessages
        • CryptographyMessages
        • CultureMessages
        • DiagnosticsMessages
        • EventSourceMessages
        • ExecutionEngineMessages
        • FormatMessages
        • HostProtectionMessages
        • IOMessages
        • IndexOutOfRangeMessages
        • InteropServiceMessages
        • InvalidCastMessages
        • InvalidOperationMessages
        • IsolatedStorageMessages
        • LazyMessages
        • MarshalerMessages
        • MemoryMessages
        • MiscellaneousMessages
        • NotImplementedMessages
        • NotSupportedMessages
        • ObjectDisposedMessages
        • OperationCanceledMessages
        • OverflowMessages
        • PlatformMessages
        • PolicyMessages
        • PrincipalMessages
        • ProgramMessages
        • ReferenceMessages
        • ReflectionMessages
        • RegionMessages
        • RemotingMessages
        • ResourcesMessages
        • SecurityMessages
        • SerializationMessages
        • StackMessages
        • TaskMessages
        • TextMessages
        • ThreadingMessages
        • TimeZoneMessages
        • TypeMessages
        • XmlMessages
      • HttpStatusCode
      • OpcUaStatusCode
    • Avalanche.Template
      • Introduction
      • TemplateFormats
      • ITemplatePrintable
      • ITemplateFormatPrintable
      • ITemplateText
      • ITemplateBreakdown
      • ITemplateFormat
      • ITemplateFormats
      • Extract Arguments
      • Emplacement
    • Avalanche.Tokenizer
      • Introduction
      • IToken
      • ITokenizer
      • Tokenizers
    • Avalanche.Utilities
      • Introduction
      • Collections
        • Tuples
        • StructList
        • ArrayList
        • BijectionMap
        • LocakableDictionary
        • LockableList
        • MapList
        • Pipe
        • RingQueue
        • EnumerableExtensions
        • TupleUtilities
        • ArrayUtilities
      • Comparers
        • IGraphComparer
        • IGraphComparable
        • AlphaNumericComparer
        • EnumerableComparer
        • EnumerableGraphComparer
        • ReferenceComparer
        • KeyValuePairComparer
        • DefaultComparerProvider
        • RecordComparer
      • Cloners
        • ICloner
        • IGraphCloner
        • IGraphCloneable
        • ListCloner
        • DictionaryCloner
        • FieldCloner
        • PassthroughCloner
        • RecordCloner
        • ClonerProvider
      • Dispose
        • IDisposeAttachable
        • IDisposeBelatable
      • Provider
        • Introduction
        • ProviderBase
        • Delegate
        • Pipe
        • Cache
        • ResultCapture
        • AsReadOnly
        • AsService
        • IProviderEvent
      • Record
        • IRecordDescription
        • IFieldDescription
        • IConstructorDescription
        • IConstructionDescription
        • IParameterDescription
        • IRecordProviders
        • RecordDelegates
          • RecordCreate
          • RecordClone
          • RecordCopy
          • IRecordDelegates
        • FieldDelegates
          • FieldRead
          • FieldWrite
          • RecreateWith
          • IFieldDelegates
      • String
        • IEscaper
        • UnicodeString
      • Miscellaneous
        • IIdGenerator
        • Permutation
        • IReadOnly
        • IUserDataContainer
        • Void
    • Avalanche.Writer
      • Introduction
      • ConstantWriter
      • Context
      • ConvertWriter
      • DefaultConstructor
      • DelegateWriter
      • PassthroughWriter
      • Referer
      • TypeCast
      • Writer
      • WriterPipe
      • WriterMessages

    Decoration

    The IFileSystems.Decorate(IOption) extension method decorates a filesystem with new decorated options. Decoration options is an intersection of filesystem's options and the options in the parameters, so decoration reduces features.

    IFileSystem ram = new MemoryFileSystem();
    IFileSystem rom = ram.Decorate(Option.ReadOnly);
    

    IFileSystems.AsReadOnly() is same as IFileSystems.Decorate(Option.ReadOnly).

    IFileSystem rom = ram.AsReadOnly();
    

    Option.NoBrowse prevents browsing, hiding files.

    IFileSystem invisible = ram.Decorate(Option.NoBrowse);
    

    Option.SubPath(subpath) option exposes only a subtree of the decorated filesystem. The subpath argument must end with slash "/", or else it mounts filename prefix, e.g. "tmp-".

    IFileSystem ram = new MemoryFileSystem();
    ram.CreateDirectory("tmp/dir/");
    ram.CreateFile("tmp/dir/file.txt", new byte[] { 32, 32, 32, 32, 32, 32, 32, 32, 32 });
    
    IFileSystem tmp = ram.Decorate(Option.SubPath("tmp/"));
    tmp.PrintTreeTo(Console.Out, format: FileSystemPrintTreeExtensions.Format.DefaultPath);
    
    
    └── dir/
       └── dir/file.txt
    

    .AddSourceToBeDisposed() adds source objects to be disposed along with the decoration.

    MemoryFileSystem ram = new MemoryFileSystem();
    IFileSystemDisposable rom = ram.Decorate(Option.ReadOnly).AddSourceToBeDisposed();
    // Do work ...
    rom.Dispose();
    

    Decorations implement IDisposeAttachable and IDisposeBelatable which allows to attach disposable objects.

    MemoryFileSystem ram = new MemoryFileSystem();
    ram.CreateDirectory("tmp/dir/");
    ram.CreateFile("tmp/dir/file.txt", new byte[] { 32, 32, 32, 32, 32, 32, 32, 32, 32 });
    IFileSystemDisposable rom = ram.Decorate(Option.ReadOnly).AttachDisposable(ram);
    // Do work ...
    rom.Dispose();
    

    If multiple decorations are used, the source reference can be 'forgotten' after construction if belate dispose handles are passed over to decorations.

    // Create ram filesystem
    MemoryFileSystem ram = new MemoryFileSystem();
    ram.CreateDirectory("tmp/dir/");
    ram.CreateFile("tmp/dir/file.txt", new byte[] { 32, 32, 32, 32, 32, 32, 32, 32, 32 });
    
    // Create decorations
    IFileSystemDisposable rom = ram.Decorate(Option.ReadOnly).AttachDisposable(ram.BelateDispose());
    IFileSystemDisposable tmp = ram.Decorate(Option.SubPath("tmp/")).AttachDisposable(ram.BelateDispose());
    ram.Dispose(); // <- is actually postponed
    
    // Do work ...
    
    // Dispose rom1 and tmp, disposes ram as well
    rom.Dispose();
    tmp.Dispose();
    

    Concat

    FileSystems.Concat(IFileSystem[]) method composes IFileSystem instances into one.

    IFileSystem ram = new MemoryFileSystem();
    IFileSystem os = FileSystem.OS;
    IFileSystem fp = new PhysicalFileProvider(AppDomain.CurrentDomain.BaseDirectory).ToFileSystem()
        .AddDisposeAction(fs => fs.FileProviderDisposable?.Dispose());
    IFileSystem embedded = new EmbeddedFileSystem(typeof(Composition_Examples).Assembly);
    
    IFileSystem composition = FileSystemExtensions.Concat(ram, os, fp, embedded)
        .AttachDisposable(embedded)
        .AttachDisposable(fp)
        .AttachDisposable(os);
    

    Composed set of files can be browsed.

    foreach (var entry in composition.VisitTree(depth: 1))
        Console.WriteLine(entry);
    

    Files can be read from the composed set.

    using (Stream s = composition.Open("docs.example-file.txt", FileMode.Open, FileAccess.Read, FileShare.Read))
    {
        Console.WriteLine(s.Length);
    }
    

    If two files have same name and path, the file in the first IFileSystem overshadows files from later IFileSystems.

    IFileSystem ram1 = new MemoryFileSystem();
    IFileSystem ram2 = new MemoryFileSystem();
    IFileSystem composition = FileSystemExtensions.Concat(ram1, ram2);
    
    // Create file of 1024 bytes
    ram1.CreateFile("file.txt", new byte[1024]);
    
    // Create file of 10 bytes
    ram2.CreateFile("file.txt", new byte[10]);
    
    // Get only one entry size of 1024 bytes.
    composition.PrintTreeTo(Console.Out, format: FileSystemPrintTreeExtensions.Format.Default | FileSystemPrintTreeExtensions.Format.Length);
    
    ""
    └── "file.txt" 1024
    

    FileSystems.Concat((IFileSystem, IOption)[]) applies options to the filesystems.

    IFileSystem filesystem = FileSystem.Application;
    IFileSystem overrides = new MemoryFileSystem();
    IFileSystem composition = FileSystemExtensions.Concat(
        (filesystem, null),
        (overrides, Option.ReadOnly)
    );
    
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    Back to top Copyright © Toni Kalajainen