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| 1 // Copyright (c) 2012 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_EXTENSIONS_SETTINGS_POLICY_VALUE_STORE_H_ | |
| 6 #define CHROME_BROWSER_EXTENSIONS_SETTINGS_POLICY_VALUE_STORE_H_ | |
| 7 | |
| 8 #include <string> | |
| 9 #include <vector> | |
| 10 | |
| 11 #include "base/compiler_specific.h" | |
| 12 #include "base/memory/ref_counted.h" | |
| 13 #include "base/memory/scoped_ptr.h" | |
| 14 #include "chrome/browser/extensions/settings/settings_observer.h" | |
| 15 #include "chrome/browser/value_store/value_store.h" | |
| 16 | |
| 17 namespace policy { | |
| 18 class PolicyMap; | |
| 19 } | |
| 20 | |
| 21 namespace extensions { | |
| 22 | |
| 23 // A ValueStore that is backed by another, persistent ValueStore, and stores | |
| 24 // the policies for a specific extension there. This ValueStore is used to | |
| 25 // run the function of the storage.managed namespace; it's read-only for the | |
| 26 // extension. The ManagedValueStoreCache sends updated policy to this store | |
| 27 // and manages its lifetime. | |
| 28 class PolicyValueStore : public ValueStore { | |
| 29 public: | |
| 30 PolicyValueStore(const std::string& extension_id, | |
| 31 const scoped_refptr<SettingsObserverList>& observers, | |
| 32 scoped_ptr<ValueStore> delegate); | |
| 33 virtual ~PolicyValueStore(); | |
| 34 | |
| 35 // Stores |policy| in the persistent database represented by the |delegate_|. | |
| 36 // If |notify_if_changed| and |policy| differs from the previously persisted | |
| 37 // version, then a notification is sent to the |observers_| with a list of the | |
| 38 // changes detected. | |
| 39 void SetCurrentPolicy(const policy::PolicyMap& policy, | |
| 40 bool notify_if_changed); | |
| 41 | |
| 42 // Clears all the stored data and deletes the database. | |
| 43 void DeleteStorage(); | |
| 44 | |
| 45 // ValueStore implementation: | |
| 46 virtual size_t GetBytesInUse(const std::string& key) OVERRIDE; | |
| 47 virtual size_t GetBytesInUse(const std::vector<std::string>& keys) OVERRIDE; | |
| 48 virtual size_t GetBytesInUse() OVERRIDE; | |
| 49 virtual ReadResult Get(const std::string& key) OVERRIDE; | |
| 50 virtual ReadResult Get(const std::vector<std::string>& keys) OVERRIDE; | |
| 51 virtual ReadResult Get() OVERRIDE; | |
| 52 virtual WriteResult Set( | |
| 53 WriteOptions options, | |
| 54 const std::string& key, | |
| 55 const base::Value& value) OVERRIDE; | |
| 56 virtual WriteResult Set( | |
| 57 WriteOptions options, const base::DictionaryValue& values) OVERRIDE; | |
| 58 virtual WriteResult Remove(const std::string& key) OVERRIDE; | |
| 59 virtual WriteResult Remove(const std::vector<std::string>& keys) OVERRIDE; | |
| 60 virtual WriteResult Clear() OVERRIDE; | |
| 61 | |
| 62 // For unit tests. | |
| 63 ValueStore* delegate() { return delegate_.get(); } | |
| 64 | |
| 65 private: | |
| 66 std::string extension_id_; | |
| 67 scoped_refptr<SettingsObserverList> observers_; | |
| 68 scoped_ptr<ValueStore> delegate_; | |
| 69 | |
| 70 DISALLOW_COPY_AND_ASSIGN(PolicyValueStore); | |
| 71 }; | |
| 72 | |
| 73 } // namespace extensions | |
| 74 | |
| 75 #endif // CHROME_BROWSER_EXTENSIONS_SETTINGS_POLICY_VALUE_STORE_H_ | |
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