extensions/common/features/feature_provider.h

   1 // Copyright 2013 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_FEATURE_PROVIDER_H_
   6 #define EXTENSIONS_COMMON_FEATURES_FEATURE_PROVIDER_H_
   7
   8 #include <string>
   9 #include <vector>
  10
  11 namespace extensions {
  12
  13 class Feature;
  14
  15 // Implemented by classes that can vend features.
  16 class FeatureProvider {
  17  public:
  18   FeatureProvider() {}
  19   virtual ~FeatureProvider() {}
  20
  21   // Returns the feature with the specified name.
  22   virtual Feature* GetFeature(const std::string& name) const = 0;
  23
  24   // Returns the parent feature of |feature|, or NULL if there isn't one.
  25   virtual Feature* GetParent(Feature* feature) const = 0;
  26
  27   // Returns the features inside the |parent| namespace, recursively.
  28   virtual std::vector<Feature*> GetChildren(const Feature& parent) const = 0;
  29
  30   // Returns all features described by this instance, in asciibetical order.
  31   virtual const std::vector<std::string>& GetAllFeatureNames() const = 0;
  32
  33   // Gets a feature provider for a specific feature type, like "permission".
  34   static const FeatureProvider* GetByName(const std::string& name);
  35
  36   // Directly access the common feature types.
  37   static const FeatureProvider* GetAPIFeatures();
  38   static const FeatureProvider* GetManifestFeatures();
  39   static const FeatureProvider* GetPermissionFeatures();
  40 };
  41
  42 }  // namespace extensions
  43
  44 #endif  // EXTENSIONS_COMMON_FEATURES_FEATURE_PROVIDER_H_