/home/sebastian/gpudbms/trunk/cogadb/include/lookup_table/lookup_column.hpp

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#pragma once

#include <core/base_column.hpp>
#include <core/lookup_array.hpp>

namespace CoGaDB{

class LookupColumn{
        public:


        LookupColumn(TablePtr table, PositionListPtr tids);

//      template <typename T>
//      const shared_pointer_namespace::shared_ptr<LookupArray<T> > getColumnbyName(std::string s) const;

        const ColumnPtr getLookupArrayforColumnbyName(const Attribut& attr) const;

        //const ColumnVectorPtr getDenseValueColumns() const;
        
        const ColumnVectorPtr getLookupArrays() const;

//      const ColumnPtr getLookupArrayforColumn(std::string column_name);

        const TablePtr getTable() const throw();

        const PositionListPtr getPositionList() const throw();

        const shared_pointer_namespace::shared_ptr<LookupColumn> aggregate(const LookupColumn& lookup_col) const;
        /* \brief returns copy of LookupColumn*/
        const shared_pointer_namespace::shared_ptr<LookupColumn> copy() const;

        protected:
        TablePtr table_;
        PositionListPtr tids_;
};

//      typedef LookupColumn::PositionListPtr PositionListPtr;
        typedef shared_pointer_namespace::shared_ptr<LookupColumn> LookupColumnPtr;


        //template <typename T>
//      const ColumnPtr LookupColumn::getLookupArrayforColumnbyName(const Attribut& attr) const{
//              
//              ColumnPtr column = table_->getColumnbyName(attr.second);
//              if(!column){
//                      return ColumnPtr(); //shared_pointer_namespace::shared_ptr<LookupArray<T> >(  ); //return NULL Pointer
//              }
//              if(column->getType()!=attr.first){
//                      cout << "FATAL ERROR: FOUND Column " << column->getName() << " of Table " << table_->getName() << " does not match Attribut type for LookupColumn!" << endl;
//                      cout << "File: " << __FILE__ << " Line:" << __LINE__ << endl;
//                      return ColumnPtr(); //return NULL Pointer
//              }

//              if(typeid(T)!=column->type()){
//                      return shared_pointer_namespace::shared_ptr<LookupArray<T> >(  ); //return NULL Pointer
//              }

//              return shared_pointer_namespace::shared_ptr<LookupArray<T> >( new LookupArray<T>(column,tids_) );
//      }


}; //end namespace CogaDB