AColumn.h

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#ifndef OPAL_AColumn_HH
#define OPAL_AColumn_HH

// ------------------------------------------------------------------------
// $RCSfile: AColumn.h,v $
// ------------------------------------------------------------------------
// $Revision: 1.1.1.1 $
// ------------------------------------------------------------------------
// Copyright: see Copyright.readme
// ------------------------------------------------------------------------
//
// Class: AColumn
//
// ------------------------------------------------------------------------
//
// $Date: 2000/03/27 09:33:41 $
// $Author: Andreas Adelmann $
//
// ------------------------------------------------------------------------

#include "AbstractObjects/Expressions.h"
#include "AbstractObjects/RangeRep.h"
#include <iosfwd>

class Table;


namespace Expressions {

    // Class AColumn.
    // ----------------------------------------------------------------------
    //  The result is defined as the values contained in that column,
    //  delimited by a range.

    class AColumn: public OArray<double> {

    public:

        //  Use table name [b]tName[/b], column name [b]cName[/b], and range
        //  representation [b]rng[/b].
        AColumn(const std::string &tName, const std::string &cName,
                const RangeRep &rng);

        AColumn(const AColumn &);
        ~AColumn();

        virtual OArray<double> *clone() const;

        virtual std::vector<double> evaluate() const;

        virtual void print(std::ostream &os, int precedence = 99) const;

    private:

        // Not implemented.
        AColumn();
        const AColumn &operator=(const AColumn &);

        // Table and column name.
        const std::string tab_name;
        const std::string col_name;

        // The range specification.
        RangeRep itsRange;
    };

}

#endif // OPAL_AColumn_HH