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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() {}
// Returns the feature with the specified name.
virtual Feature* GetFeature(const std::string& name) = 0;
// Returns the parent feature of |feature|, or NULL if there isn't one.
virtual Feature* GetParent(Feature* feature) = 0;
// Returns all features described by this instance.
virtual const std::vector<std::string>& GetAllFeatureNames() = 0;
// Gets a feature provider for a specific feature type, like "permission".
static FeatureProvider* GetByName(const std::string& name);
};
} // namespace extensions
#endif // EXTENSIONS_COMMON_FEATURES_FEATURE_PROVIDER_H_
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