MultipleOccupancy.h

/*
 *   Repast for High Performance Computing (Repast HPC)
 *
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 *     Redistributions in binary form must reproduce the above copyright notice,
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 *     this software without specific prior written permission.
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 *
 *  MultipleOccupancy.h
 *
 *  Created on: Aug 11, 2010
 *      Author: nick
 */
 
#ifndef MULTIPLEOCCUPANCY_H_
#define MULTIPLEOCCUPANCY_H_
 
#include <boost/unordered_map.hpp>
#include <boost/shared_ptr.hpp>
 
#include "Point.h"
 
namespace repast {
 
 
template<typename T>
struct ExtractPtrs: public std::unary_function<
                typename boost::unordered_map<AgentId, boost::shared_ptr<T> >::value_type, T*> {
        T* operator()(typename boost::unordered_map<AgentId, boost::shared_ptr<T> >::value_type& val) {
                return val.second.get();
        }
};
 
template<typename T, typename GPType>
class MultipleOccupancy {
 
private:
        typedef typename boost::unordered_map<AgentId, boost::shared_ptr<T>, HashId> ValueType;
        typedef typename ValueType::iterator ValueTypeIter;
        typedef typename boost::unordered_map<Point<GPType> , ValueType*, HashGridPoint<GPType> > LocationMap;
 
        typedef typename LocationMap::iterator LocationMapIter;
        typedef typename LocationMap::const_iterator LocationMapConstIter;
 
        LocationMap locations;
 
        ValueType* doGet(const Point<GPType>& location) const;
 
public:
 
        virtual ~MultipleOccupancy();
 
        T* get(const Point<GPType>& location) const;
 
        void getAll(const Point<GPType>& location, std::vector<T*>& out) const;
 
        bool put(boost::shared_ptr<T>& agent, const Point<GPType>& location);
 
        void remove(boost::shared_ptr<T>& agent, const Point<GPType>& location);
 
};
 
template<typename T, typename GPType>
MultipleOccupancy<T, GPType>::~MultipleOccupancy() {
        for (LocationMapIter iter = locations.begin(); iter != locations.end(); ++iter) {
                delete iter->second;
        }
}
 
template<typename T, typename GPType>
typename MultipleOccupancy<T, GPType>::ValueType* MultipleOccupancy<T, GPType>::doGet(const Point<GPType>& location) const {
        LocationMapConstIter iter = locations.find(location);
        if (iter == locations.end())
                return NULL;
        return iter->second;
}
 
template<typename T, typename GPType>
T* MultipleOccupancy<T, GPType>::get(const Point<GPType>& location) const {
        ValueType* ptrs = doGet(location);
        if (ptrs == NULL)
                return NULL;
        return ptrs->begin()->second.get();
}
 
template<typename T, typename GPType>
void MultipleOccupancy<T, GPType>::getAll(const Point<GPType>& location, std::vector<T*>& out) const {
  ValueType* ptrs = doGet(location);
        if (ptrs != NULL) {
                int index = out.size();
                out.resize(out.size() + ptrs->size(), 0);
                ExtractPtrs<T> func;
                std::transform(ptrs->begin(), ptrs->end(), out.begin() + index, func);
        }
}
 
template<typename T, typename GPType>
bool MultipleOccupancy<T, GPType>::put(boost::shared_ptr<T>& agent, const Point<GPType>& location) {
        LocationMapIter iter = locations.find(location);
        ValueType* vec;
        if (iter == locations.end()) {
                vec = new ValueType();
                locations[location] = vec;
        } else {
                vec = iter->second;
        }
        vec->insert(std::make_pair(agent->getId(), agent));
 
        return true;
}
 
template<typename T, typename GPType>
void MultipleOccupancy<T, GPType>::remove(boost::shared_ptr<T>& agent, const Point<GPType>& location) {
        LocationMapIter iter = locations.find(location);
        if (iter != locations.end()) {
                ValueType* vec = iter->second;
                ValueTypeIter agentIter = vec->find(agent->getId());
 
                if (agentIter != vec->end()) {
                        vec->erase(agentIter);
                        if (vec->size() == 0) {
                                delete vec;
                                locations.erase(iter);
                        }
 
                }
 
        }
}
 
}
 
#endif /* MULTIPLEOCCUPANCY_H_ */