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// 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 'package:path/path.dart' as p;
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._();
p.Context get context => p.context;
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 {
final Uri uri;
int get hashCode => uri.hashCode;
bool operator ==(Object other) =>
other is _PhysicalFileSystemEntity && other.uri == uri;
Future<List<int>> readAsBytes() => new io.File.fromUri(uri).readAsBytes();
Future<String> readAsString() => new io.File.fromUri(uri).readAsString();