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_API_STORAGE_POLICY_VALUE_STORE_H_ 6 #define CHROME_BROWSER_EXTENSIONS_API_STORAGE_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 "extensions/browser/api/storage/settings_observer.h" 15 #include "extensions/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 // and notifies observers with the changes from the previous policy. 37 void SetCurrentPolicy(const policy::PolicyMap& policy); 38 39 // Clears all the stored data and deletes the database. 40 void DeleteStorage(); 41 42 // ValueStore implementation: 43 virtual size_t GetBytesInUse(const std::string& key) OVERRIDE; 44 virtual size_t GetBytesInUse(const std::vector<std::string>& keys) OVERRIDE; 45 virtual size_t GetBytesInUse() OVERRIDE; 46 virtual ReadResult Get(const std::string& key) OVERRIDE; 47 virtual ReadResult Get(const std::vector<std::string>& keys) OVERRIDE; 48 virtual ReadResult Get() OVERRIDE; 49 virtual WriteResult Set( 50 WriteOptions options, 51 const std::string& key, 52 const base::Value& value) OVERRIDE; 53 virtual WriteResult Set( 54 WriteOptions options, const base::DictionaryValue& values) OVERRIDE; 55 virtual WriteResult Remove(const std::string& key) OVERRIDE; 56 virtual WriteResult Remove(const std::vector<std::string>& keys) OVERRIDE; 57 virtual WriteResult Clear() OVERRIDE; 58 // Hopefully, as a Read-Only database, there is no reason to use these. 59 virtual bool Restore() OVERRIDE; 60 virtual bool RestoreKey(const std::string& key) 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_API_STORAGE_POLICY_VALUE_STORE_H_ 76
