chrome/browser/chromeos/fileapi/file_system_backend_delegate.h

   1 // Copyright 2013 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #ifndef CHROME_BROWSER_CHROMEOS_FILEAPI_FILE_SYSTEM_BACKEND_DELEGATE_H_
   6 #define CHROME_BROWSER_CHROMEOS_FILEAPI_FILE_SYSTEM_BACKEND_DELEGATE_H_
   7
   8 #include "base/basictypes.h"
   9 #include "base/memory/scoped_ptr.h"
  10 #include "base/platform_file.h"
  11 #include "webkit/common/fileapi/file_system_types.h"
  12
  13 namespace base {
  14 class Time;
  15 }  // namespace base
  16
  17 namespace fileapi {
  18 class AsyncFileUtil;
  19 class FileSystemContext;
  20 class FileSystemOperation;
  21 class FileSystemURL;
  22 class FileStreamWriter;
  23 }  // namespace fileapi
  24
  25 namespace webkit_blob {
  26 class FileStreamReader;
  27 }  // namespace webkit_blob
  28
  29 namespace chromeos {
  30
  31 // This is delegate interface to inject the implementation of the some methods
  32 // of FileSystemBackend. The main goal is to inject Drive File System.
  33 class FileSystemBackendDelegate {
  34  public:
  35   virtual ~FileSystemBackendDelegate() {}
  36
  37   // Called from FileSystemBackend::GetAsyncFileUtil().
  38   virtual fileapi::AsyncFileUtil* GetAsyncFileUtil(
  39       fileapi::FileSystemType type) = 0;
  40
  41   // Called from FileSystemBackend::CreateFileStreamReader().
  42   virtual scoped_ptr<webkit_blob::FileStreamReader> CreateFileStreamReader(
  43       const fileapi::FileSystemURL& url,
  44       int64 offset,
  45       const base::Time& expected_modification_time,
  46       fileapi::FileSystemContext* context) = 0;
  47
  48   // Called from FileSystemBackend::CreateFileStreamWriter().
  49   virtual scoped_ptr<fileapi::FileStreamWriter> CreateFileStreamWriter(
  50       const fileapi::FileSystemURL& url,
  51       int64 offset,
  52       fileapi::FileSystemContext* context) = 0;
  53 };
  54
  55 }  // namespace chromeos
  56
  57 #endif  // CHROME_BROWSER_CHROMEOS_FILEAPI_FILE_SYSTEM_BACKEND_DELEGATE_H_