| // Copyright (c) 2013, 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. |
| |
| part of dart.io; |
| |
| class FileSystemEntityType { |
| static const FILE = const FileSystemEntityType._internal(0); |
| static const DIRECTORY = const FileSystemEntityType._internal(1); |
| static const LINK = const FileSystemEntityType._internal(2); |
| static const NOT_FOUND = const FileSystemEntityType._internal(3); |
| static const _typeList = const [FileSystemEntityType.FILE, |
| FileSystemEntityType.DIRECTORY, |
| FileSystemEntityType.LINK, |
| FileSystemEntityType.NOT_FOUND]; |
| const FileSystemEntityType._internal(int this._type); |
| |
| static FileSystemEntityType _lookup(int type) => _typeList[type]; |
| String toString() => const ['FILE', 'DIRECTORY', 'LINK', 'NOT_FOUND'][_type]; |
| |
| final int _type; |
| } |
| |
| /** |
| * A [FileSystemEntity] is a common super class for [File] and |
| * [Directory] objects. |
| * |
| * [FileSystemEntity] objects are returned from directory listing |
| * operations. To determine if a FileSystemEntity is a [File] or a |
| * [Directory], perform a type check: |
| * |
| * if (entity is File) (entity as File).readAsStringSync(); |
| */ |
| abstract class FileSystemEntity { |
| String get path; |
| |
| external static _getType(String path, bool followLinks); |
| external static _identical(String path1, String path2); |
| |
| static int _getTypeSync(String path, bool followLinks) { |
| var result = _getType(path, followLinks); |
| _throwIfError(result, 'Error getting type of FileSystemEntity'); |
| return result; |
| } |
| |
| static Future<int> _getTypeAsync(String path, bool followLinks) { |
| // Get a new file service port for each request. We could also cache one. |
| var service = _FileUtils._newServicePort(); |
| List request = new List(3); |
| request[0] = _TYPE_REQUEST; |
| request[1] = path; |
| request[2] = followLinks; |
| return service.call(request).then((response) { |
| if (_isErrorResponse(response)) { |
| throw _exceptionFromResponse(response, |
| "Error getting type of '$path'"); |
| } |
| return response; |
| }); |
| } |
| |
| /** |
| * Do two paths refer to the same object in the file system? |
| * Links are not identical to their targets, and two links |
| * are not identical just because they point to identical targets. |
| * Links in intermediate directories in the paths are followed, though. |
| * |
| * Throws an error if one of the paths points to an object that does not |
| * exist. |
| * The target of a link can be compared by first getting it with Link.target. |
| */ |
| static Future<bool> identical(String path1, String path2) { |
| // Get a new file service port for each request. We could also cache one. |
| var service = _FileUtils._newServicePort(); |
| List request = new List(3); |
| request[0] = _IDENTICAL_REQUEST; |
| request[1] = path1; |
| request[2] = path2; |
| return service.call(request).then((response) { |
| if (_isErrorResponse(response)) { |
| throw _exceptionFromResponse(response, |
| "Error in FileSystemEntity.identical($path1, $path2)"); |
| } |
| return response; |
| }); |
| } |
| |
| |
| /** |
| * Do two paths refer to the same object in the file system? |
| * Links are not identical to their targets, and two links |
| * are not identical just because they point to identical targets. |
| * Links in intermediate directories in the paths are followed, though. |
| * |
| * Throws an error if one of the paths points to an object that does not |
| * exist. |
| * The target of a link can be compared by first getting it with Link.target. |
| */ |
| static bool identicalSync(String path1, String path2) { |
| var result = _identical(path1, path2); |
| _throwIfError(result, 'Error in FileSystemEntity.identicalSync'); |
| return result; |
| } |
| |
| static Future<FileSystemEntityType> type(String path, |
| {bool followLinks: true}) |
| => _getTypeAsync(path, followLinks).then(FileSystemEntityType._lookup); |
| |
| static FileSystemEntityType typeSync(String path, {bool followLinks: true}) |
| => FileSystemEntityType._lookup(_getTypeSync(path, followLinks)); |
| |
| static Future<bool> isLink(String path) => _getTypeAsync(path, false) |
| .then((type) => (type == FileSystemEntityType.LINK._type)); |
| |
| static Future<bool> isFile(String path) => _getTypeAsync(path, true) |
| .then((type) => (type == FileSystemEntityType.FILE._type)); |
| |
| static Future<bool> isDirectory(String path) => _getTypeAsync(path, true) |
| .then((type) => (type == FileSystemEntityType.DIRECTORY._type)); |
| |
| static bool isLinkSync(String path) => |
| (_getTypeSync(path, false) == FileSystemEntityType.LINK._type); |
| |
| static bool isFileSync(String path) => |
| (_getTypeSync(path, true) == FileSystemEntityType.FILE._type); |
| |
| static bool isDirectorySync(String path) => |
| (_getTypeSync(path, true) == FileSystemEntityType.DIRECTORY._type); |
| |
| static _throwIfError(Object result, String msg) { |
| if (result is OSError) { |
| throw new FileIOException(msg, result); |
| } else if (result is ArgumentError) { |
| throw result; |
| } |
| } |
| } |