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_COMMON_EXTENSIONS_FEATURES_BASE_FEATURE_PROVIDER_H_ 6 #define CHROME_COMMON_EXTENSIONS_FEATURES_BASE_FEATURE_PROVIDER_H_ 7 8 #include <map> 9 #include <string> 10 #include <vector> 11 12 #include "base/memory/linked_ptr.h" 13 #include "base/values.h" 14 #include "chrome/common/extensions/features/simple_feature.h" 15 #include "extensions/common/features/feature_provider.h" 16 17 namespace extensions { 18 19 // Reads Features out of a simple JSON file description. 20 class BaseFeatureProvider : public FeatureProvider { 21 public: 22 typedef SimpleFeature*(*FeatureFactory)(); 23 24 // Creates a new BaseFeatureProvider. Pass null to |factory| to have the 25 // provider create plain old Feature instances. 26 BaseFeatureProvider(const base::DictionaryValue& root, 27 FeatureFactory factory); 28 virtual ~BaseFeatureProvider(); 29 30 // Gets a feature provider for a specific feature type, like "permission". 31 static FeatureProvider* GetByName(const std::string& name); 32 33 // Gets the feature |feature_name|, if it exists. 34 virtual Feature* GetFeature(const std::string& feature_name) OVERRIDE; 35 virtual Feature* GetParent(Feature* feature) OVERRIDE; 36 37 virtual const std::vector<std::string>& GetAllFeatureNames() OVERRIDE; 38 39 private: 40 typedef std::map<std::string, linked_ptr<Feature> > FeatureMap; 41 FeatureMap features_; 42 43 std::vector<std::string> feature_names_; 44 45 FeatureFactory factory_; 46 }; 47 48 } // namespace extensions 49 50 #endif // CHROME_COMMON_EXTENSIONS_FEATURES_BASE_FEATURE_PROVIDER_H_ 51