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_COMMON_FEATURES_BASE_FEATURE_PROVIDER_H_ 6 #define EXTENSIONS_COMMON_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 "extensions/common/features/feature_provider.h" 15 #include "extensions/common/features/simple_feature.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 the feature |feature_name|, if it exists. 31 virtual Feature* GetFeature(const std::string& feature_name) const OVERRIDE; 32 virtual Feature* GetParent(Feature* feature) const OVERRIDE; 33 virtual std::vector<Feature*> GetChildren(const Feature& parent) const 34 OVERRIDE; 35 36 virtual const std::vector<std::string>& GetAllFeatureNames() const OVERRIDE; 37 38 private: 39 typedef std::map<std::string, linked_ptr<Feature> > FeatureMap; 40 FeatureMap features_; 41 42 // Populated on first use. 43 mutable std::vector<std::string> feature_names_; 44 45 FeatureFactory factory_; 46 }; 47 48 } // namespace extensions 49 50 #endif // EXTENSIONS_COMMON_FEATURES_BASE_FEATURE_PROVIDER_H_ 51
