extensions/browser/api/storage/weak_unlimited_settings_storage.h

   1 // Copyright 2014 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 EXTENSIONS_BROWSER_API_STORAGE_WEAK_UNLIMITED_SETTINGS_STORAGE_H_
   6 #define EXTENSIONS_BROWSER_API_STORAGE_WEAK_UNLIMITED_SETTINGS_STORAGE_H_
   7
   8 #include "base/compiler_specific.h"
   9 #include "extensions/browser/value_store/value_store.h"
  10
  11 namespace extensions {
  12
  13 // A ValueStore decorator which makes calls through |Set| ignore quota.
  14 // "Weak" because ownership of the delegate isn't taken; this is designed to be
  15 // temporarily attached to storage areas.
  16 class WeakUnlimitedSettingsStorage : public ValueStore {
  17  public:
  18   // Ownership of |delegate| NOT taken.
  19   explicit WeakUnlimitedSettingsStorage(ValueStore* delegate);
  20
  21   ~WeakUnlimitedSettingsStorage() override;
  22
  23   // ValueStore implementation.
  24   size_t GetBytesInUse(const std::string& key) override;
  25   size_t GetBytesInUse(const std::vector<std::string>& keys) override;
  26   size_t GetBytesInUse() override;
  27   ReadResult Get(const std::string& key) override;
  28   ReadResult Get(const std::vector<std::string>& keys) override;
  29   ReadResult Get() override;
  30   WriteResult Set(WriteOptions options,
  31                   const std::string& key,
  32                   const base::Value& value) override;
  33   WriteResult Set(WriteOptions options,
  34                   const base::DictionaryValue& values) override;
  35   WriteResult Remove(const std::string& key) override;
  36   WriteResult Remove(const std::vector<std::string>& keys) override;
  37   WriteResult Clear() override;
  38   bool Restore() override;
  39   bool RestoreKey(const std::string& key) override;
  40
  41  private:
  42   // The delegate storage area, NOT OWNED.
  43   ValueStore* const delegate_;
  44
  45   DISALLOW_COPY_AND_ASSIGN(WeakUnlimitedSettingsStorage);
  46 };
  47
  48 }  // namespace extensions
  49
  50 #endif  // EXTENSIONS_BROWSER_API_STORAGE_WEAK_UNLIMITED_SETTINGS_STORAGE_H_