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/* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
/**
* Copyright (C) 2014 Named Data Networking Project
* See COPYING for copyright and distribution information.
*/
#ifndef NFD_TABLE_STRATEGY_CHOICE_HPP
#define NFD_TABLE_STRATEGY_CHOICE_HPP
#include "strategy-choice-entry.hpp"
#include "name-tree.hpp"
namespace nfd {
class StrategyChoice : noncopyable
{
public:
StrategyChoice(NameTree& nameTree, shared_ptr<fw::Strategy> defaultStrategy);
public: // available Strategy types
/** \return true if strategy is installed
*/
bool
hasStrategy(const Name& strategyName) const;
/** \brief install a strategy
* \return true if installed; false if not installed due to duplicate strategyName
*/
bool
install(shared_ptr<fw::Strategy> strategy);
public: // Strategy Choice table
/** \brief set strategy of prefix to be strategyName
* \param strategyName the strategy to be used, must be installed
* \return true on success
*/
bool
insert(const Name& prefix, const Name& strategyName);
/** \brief make prefix to inherit strategy from its parent
*
* not allowed for root prefix (ndn:/)
*/
void
erase(const Name& prefix);
/** \brief get strategy Name of prefix
* \return strategyName at exact match, or nullptr
*/
shared_ptr<const Name>
get(const Name& prefix) const;
public: // effect strategy
/// get effective strategy for prefix
fw::Strategy&
findEffectiveStrategy(const Name& prefix) const;
/// get effective strategy for pitEntry
fw::Strategy&
findEffectiveStrategy(const pit::Entry& pitEntry) const;
/// get effective strategy for measurementsEntry
fw::Strategy&
findEffectiveStrategy(const measurements::Entry& measurementsEntry) const;
/// number of entries stored
size_t
size() const;
private:
shared_ptr<fw::Strategy>
getStrategy(const Name& strategyName);
void
setDefaultStrategy(shared_ptr<fw::Strategy> strategy);
void
changeStrategy(shared_ptr<strategy_choice::Entry> entry,
shared_ptr<fw::Strategy> oldStrategy,
shared_ptr<fw::Strategy> newStrategy);
fw::Strategy&
findEffectiveStrategy(shared_ptr<name_tree::Entry> nameTreeEntry) const;
private:
NameTree& m_nameTree;
size_t m_nItems;
typedef std::map<Name, shared_ptr<fw::Strategy> > StrategyInstanceTable;
StrategyInstanceTable m_strategyInstances;
};
inline size_t
StrategyChoice::size() const
{
return m_nItems;
}
} // namespace nfd
#endif // NFD_TABLE_STRATEGY_CHOICE_HPP