webkit/fileapi/async_file_util_adapter.h

   1 // Copyright (c) 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 WEBKIT_FILEAPI_ASYNC_FILE_UTIL_ADAPTER_H_
   6 #define WEBKIT_FILEAPI_ASYNC_FILE_UTIL_ADAPTER_H_
   7
   8 #include "base/memory/scoped_ptr.h"
   9 #include "webkit/fileapi/async_file_util.h"
  10
  11 namespace fileapi {
  12
  13 class FileSystemFileUtil;
  14
  15 // An adapter class for FileSystemFileUtil classes to provide asynchronous
  16 // interface.
  17 //
  18 // A filesystem can do either:
  19 // - implement a synchronous version of FileUtil by extending
  20 //   FileSystemFileUtil and atach it to this adapter, or
  21 // - directly implement AsyncFileUtil.
  22 //
  23 class WEBKIT_STORAGE_EXPORT_PRIVATE AsyncFileUtilAdapter
  24     : public AsyncFileUtil {
  25  public:
  26   // Creates a new AsyncFileUtil for |sync_file_util|. This takes the
  27   // ownership of |sync_file_util|. (This doesn't take scoped_ptr<> just
  28   // to save extra make_scoped_ptr; in all use cases a new fresh FileUtil is
  29   // created only for this adapter.)
  30   explicit AsyncFileUtilAdapter(FileSystemFileUtil* sync_file_util);
  31
  32   virtual ~AsyncFileUtilAdapter();
  33
  34   FileSystemFileUtil* sync_file_util() {
  35     return sync_file_util_.get();
  36   }
  37
  38   // AsyncFileUtil overrides.
  39   virtual bool CreateOrOpen(
  40       FileSystemOperationContext* context,
  41       const FileSystemURL& url,
  42       int file_flags,
  43       const CreateOrOpenCallback& callback) OVERRIDE;
  44   virtual bool EnsureFileExists(
  45       FileSystemOperationContext* context,
  46       const FileSystemURL& url,
  47       const EnsureFileExistsCallback& callback) OVERRIDE;
  48   virtual bool CreateDirectory(
  49       FileSystemOperationContext* context,
  50       const FileSystemURL& url,
  51       bool exclusive,
  52       bool recursive,
  53       const StatusCallback& callback) OVERRIDE;
  54   virtual bool GetFileInfo(
  55       FileSystemOperationContext* context,
  56       const FileSystemURL& url,
  57       const GetFileInfoCallback& callback) OVERRIDE;
  58   virtual bool ReadDirectory(
  59       FileSystemOperationContext* context,
  60       const FileSystemURL& url,
  61       const ReadDirectoryCallback& callback) OVERRIDE;
  62   virtual bool Touch(
  63       FileSystemOperationContext* context,
  64       const FileSystemURL& url,
  65       const base::Time& last_access_time,
  66       const base::Time& last_modified_time,
  67       const StatusCallback& callback) OVERRIDE;
  68   virtual bool Truncate(
  69       FileSystemOperationContext* context,
  70       const FileSystemURL& url,
  71       int64 length,
  72       const StatusCallback& callback) OVERRIDE;
  73   virtual bool CopyFileLocal(
  74       FileSystemOperationContext* context,
  75       const FileSystemURL& src_url,
  76       const FileSystemURL& dest_url,
  77       const StatusCallback& callback) OVERRIDE;
  78   virtual bool MoveFileLocal(
  79       FileSystemOperationContext* context,
  80       const FileSystemURL& src_url,
  81       const FileSystemURL& dest_url,
  82       const StatusCallback& callback) OVERRIDE;
  83   virtual bool CopyInForeignFile(
  84         FileSystemOperationContext* context,
  85         const base::FilePath& src_file_path,
  86         const FileSystemURL& dest_url,
  87         const StatusCallback& callback) OVERRIDE;
  88   virtual bool DeleteFile(
  89       FileSystemOperationContext* context,
  90       const FileSystemURL& url,
  91       const StatusCallback& callback) OVERRIDE;
  92   virtual bool DeleteDirectory(
  93       FileSystemOperationContext* context,
  94       const FileSystemURL& url,
  95       const StatusCallback& callback) OVERRIDE;
  96   virtual bool CreateSnapshotFile(
  97       FileSystemOperationContext* context,
  98       const FileSystemURL& url,
  99       const CreateSnapshotFileCallback& callback) OVERRIDE;
 100
 101  private:
 102   scoped_ptr<FileSystemFileUtil> sync_file_util_;
 103
 104   DISALLOW_COPY_AND_ASSIGN(AsyncFileUtilAdapter);
 105 };
 106
 107 }  // namespace fileapi
 108
 109 #endif  // WEBKIT_FILEAPI_ASYNC_FILE_UTIL_ADAPTER_H_