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// Copyright 2013 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef EXTENSIONS_COMMON_FEATURES_FEATURE_PROVIDER_H_
#define EXTENSIONS_COMMON_FEATURES_FEATURE_PROVIDER_H_
#include <string>
#include <vector>
namespace extensions {
class Feature;
// Implemented by classes that can vend features.
class FeatureProvider {
public:
FeatureProvider() {}
virtual ~FeatureProvider() {}
//
// Static helpers.
//
// Gets a FeatureProvider for a specific type, like "permission".
static const FeatureProvider* GetByName(const std::string& name);
// Directly access the common FeatureProvider types.
// Each is equivalent to GetByName('featuretype').
static const FeatureProvider* GetAPIFeatures();
static const FeatureProvider* GetManifestFeatures();
static const FeatureProvider* GetPermissionFeatures();
static const FeatureProvider* GetBehaviorFeatures();
// Directly get Features from the common FeatureProvider types.
// Each is equivalent to GetByName('featuretype')->GetFeature(name).
static const Feature* GetAPIFeature(const std::string& name);
static const Feature* GetManifestFeature(const std::string& name);
static const Feature* GetPermissionFeature(const std::string& name);
static const Feature* GetBehaviorFeature(const std::string& name);
//
// Instance methods.
//
// Returns the feature with the specified name.
virtual Feature* GetFeature(const std::string& name) const = 0;
// Returns the parent feature of |feature|, or NULL if there isn't one.
virtual Feature* GetParent(Feature* feature) const = 0;
// Returns the features inside the |parent| namespace, recursively.
virtual std::vector<Feature*> GetChildren(const Feature& parent) const = 0;
// Returns all features described by this instance, in asciibetical order.
virtual const std::vector<std::string>& GetAllFeatureNames() const = 0;
};
} // namespace extensions
#endif // EXTENSIONS_COMMON_FEATURES_FEATURE_PROVIDER_H_
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