GridGeoConstraint.h

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// -*- mode: c++; c-basic-offset:4 -*-
 
// This file is part of libdap, A C++ implementation of the OPeNDAP Data
// Access Protocol.
 
// Copyright (c) 2006 OPeNDAP, Inc.
// Author: James Gallagher <jgallagher@opendap.org>
//
// This library is free software; you can redistribute it and/or
// modify it under the terms of the GNU Lesser General Public
// License as published by the Free Software Foundation; either
// version 2.1 of the License, or (at your option) any later version.
//
// This library 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
// Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public
// License along with this library; if not, write to the Free Software
// Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
//
// You can contact OPeNDAP, Inc. at PO Box 112, Saunderstown, RI. 02874-0112.
 
#ifndef _grid_geo_constraint_h
#define _grid_geo_constraint_h 1
 
#include <set>
#include <sstream>
#include <string>
 
#ifndef _geo_constraint_h
#include "GeoConstraint.h"
#endif
 
namespace functions {
 
// Defined in GeoConstraint; maybe move to util.cc/h?
extern bool unit_or_name_match(set<string> units, set<string> names, const string &var_units, const string &var_name);

 
class GridGeoConstraint : public GeoConstraint {
 
private:
    // Specific to a Grid
    libdap::Grid *d_grid; //< Constrain this Grid (weak pointer)
 
    libdap::Array *d_latitude;  //< A (weak) pointer to the Grid's latitude map
    libdap::Array *d_longitude; //< A (weak) pointer to the Grid's longitude map
 
    bool build_lat_lon_maps();
    bool build_lat_lon_maps(libdap::Array *lat, libdap::Array *lon);
 
    bool lat_lon_dimensions_ok();
 
    friend class GridGeoConstraintTest; // Unit tests
 
public:
    GridGeoConstraint(libdap::Grid *grid);
    GridGeoConstraint(libdap::Grid *grid, libdap::Array *lat, libdap::Array *lon);
 
    virtual ~GridGeoConstraint() {}
 
    virtual void apply_constraint_to_data();
 
    virtual libdap::Grid *get_constrained_grid() const { return d_grid; }
};
 
} // namespace functions
 
#endif // _grid_geo_constraint_h