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/*
* Copyright (c) 2019 Samsung Electronics Co., Ltd. All Rights Reserved
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#ifndef __LOCO_ADT_ANNOTATED_ITEM_H__
#define __LOCO_ADT_ANNOTATED_ITEM_H__
#include <map>
#include <memory>
#include <typeindex>
namespace loco
{
template <typename Annotation> class AnnotatedItem
{
public:
AnnotatedItem() = default;
public:
virtual ~AnnotatedItem() = default;
public:
/**
* @brief Retrieve a stored annotation of type T
*
* @note This method returns nullptr if annotation does not exist
*/
template <typename T> const T *annot(void) const
{
// TODO Insert static_assert(T derives Annotation);
auto it = _attrs.find(typeid(T));
if (it == _attrs.end())
{
return nullptr;
}
// TODO Insert null check
return dynamic_cast<T *>(it->second.get());
}
/**
* @brief Attach or remove a new annotation of type T
*
* @note annot<T>(nullptr) removes an attached annotation if it exists
*/
template <typename T> void annot(std::unique_ptr<T> &&p)
{
// TODO: Insert static_assert(T derives Annotation);
if (p == nullptr)
{
_attrs.erase(typeid(T));
}
else
{
// TODO: assert(_attribs.find(typeid(T)) == _attribs.end());
_attrs[typeid(T)] = std::move(p);
}
}
private:
std::map<std::type_index, std::unique_ptr<Annotation>> _attrs;
};
} // namespace loco
#endif // __LOCO_ADT_ANNOTATED_ITEM_H__
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