TransformMap.h

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/* 
 * LSST Data Management System
 * Copyright 2014 LSST Corporation.
 * 
 * This product includes software developed by the
 * LSST Project (http://www.lsst.org/).
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 * 
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 * 
 * You should have received a copy of the LSST License Statement and 
 * the GNU General Public License along with this program.  If not, 
 * see <http://www.lsstcorp.org/LegalNotices/>.
 */
 
#if !defined(LSST_AFW_GEOM_TRANSFORMMAP_H)
#define LSST_AFW_GEOM_TRANSFORMMAP_H

#include <string>
#include <utility>
#include <vector>
#include <map>
#include "lsst/afw/geom/Point.h"
#include "lsst/afw/geom/XYTransform.h"

namespace lsst {
namespace afw {
namespace geom {

template<typename CoordSysT>
class TransformMap {
public:
    typedef std::map<CoordSysT, CONST_PTR(XYTransform)> Transforms;
    typedef CoordSysT CoordSys; // needed by SWIG; see TransformMap.i

    explicit TransformMap(
        CoordSysT const &nativeCoordSys, 
        Transforms const &transforms    
    );

    explicit TransformMap();

    Point2D transform(
        Point2D const &fromPoint,       
        CoordSysT const &fromSys,        
        CoordSysT const &toCoordSys      
    ) const;

     std::vector<Point2D> transform(
        std::vector<Point2D> const &pointList,    
        CoordSysT const &fromCoordSys,    
        CoordSysT const &toCoordSys       
    ) const;

    CoordSysT getNativeCoordSys() const { return _nativeCoordSys; }

    std::vector<CoordSysT> getCoordSysList() const;

    bool contains(
        CoordSysT const &coordSys 
    ) const;

    CONST_PTR(XYTransform) operator[](
        CoordSysT const &coordSys 
    ) const;

    typename Transforms::const_iterator begin() const { return _transforms.begin(); }

    typename Transforms::const_iterator end() const { return _transforms.end(); }

    size_t size() const { return _transforms.size(); }

private:
    CoordSysT _nativeCoordSys;   
    Transforms _transforms;   
};

}}}

#endif