| // Copyright (c) 2016, the Dart project authors. Please see the AUTHORS file |
| // for details. All rights reserved. Use of this source code is governed by a |
| // BSD-style license that can be found in the LICENSE file. |
| |
| library front_end.physical_file_system; |
| |
| import 'dart:async'; |
| import 'dart:io' as io; |
| |
| import 'file_system.dart'; |
| |
| /// Concrete implementation of [FileSystem] which performs its operations using |
| /// I/O. |
| /// |
| /// Not intended to be implemented or extended by clients. |
| class PhysicalFileSystem implements FileSystem { |
| static final PhysicalFileSystem instance = new PhysicalFileSystem._(); |
| |
| PhysicalFileSystem._(); |
| |
| @override |
| FileSystemEntity entityForUri(Uri uri) { |
| if (uri.scheme != 'file' && uri.scheme != '') { |
| throw new ArgumentError('File URI expected'); |
| } |
| return new _PhysicalFileSystemEntity(Uri.base.resolveUri(uri)); |
| } |
| } |
| |
| /// Concrete implementation of [FileSystemEntity] for use by |
| /// [PhysicalFileSystem]. |
| class _PhysicalFileSystemEntity implements FileSystemEntity { |
| @override |
| final Uri uri; |
| |
| _PhysicalFileSystemEntity(this.uri); |
| |
| @override |
| int get hashCode => uri.hashCode; |
| |
| @override |
| bool operator ==(Object other) => |
| other is _PhysicalFileSystemEntity && other.uri == uri; |
| |
| @override |
| Future<bool> exists() async { |
| if (await io.FileSystemEntity.isFile(uri.toFilePath())) { |
| return new io.File.fromUri(uri).exists(); |
| } else { |
| return new io.Directory.fromUri(uri).exists(); |
| } |
| } |
| |
| @override |
| Future<DateTime> lastModified() async { |
| try { |
| return await new io.File.fromUri(uri).lastModified(); |
| } on io.FileSystemException catch (exception) { |
| throw _toFileSystemException(exception); |
| } |
| } |
| |
| @override |
| Future<List<int>> readAsBytes() async { |
| try { |
| return await new io.File.fromUri(uri).readAsBytes(); |
| } on io.FileSystemException catch (exception) { |
| throw _toFileSystemException(exception); |
| } |
| } |
| |
| @override |
| Future<String> readAsString() async { |
| try { |
| return await new io.File.fromUri(uri).readAsString(); |
| } on io.FileSystemException catch (exception) { |
| throw _toFileSystemException(exception); |
| } |
| } |
| |
| /** |
| * Return the [FileSystemException] for the given I/O exception. |
| */ |
| FileSystemException _toFileSystemException(io.FileSystemException exception) { |
| String message = exception.message; |
| String osMessage = exception.osError?.message; |
| if (osMessage != null && osMessage.isNotEmpty) { |
| message = osMessage; |
| } |
| return new FileSystemException(uri, message); |
| } |
| } |