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#ifndef SQL_GIS_COORDINATE_RANGE_VISITOR_H_INCLUDED
#define SQL_GIS_COORDINATE_RANGE_VISITOR_H_INCLUDED
// Copyright (c) 2017, 2025, Oracle and/or its affiliates.
//
// This program is free software; you can redistribute it and/or modify
// it under the terms of the GNU General Public License, version 2.0,
// as published by the Free Software Foundation.
//
// This program is designed to work with certain software (including
// but not limited to OpenSSL) that is licensed under separate terms,
// as designated in a particular file or component or in included license
// documentation. The authors of MySQL hereby grant you an additional
// permission to link the program and your derivative works with the
// separately licensed software that they have either included with
// the program or referenced in the documentation.
//
// 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, version 2.0, for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program; if not, write to the Free Software
// Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
#include <cmath> // M_PI, M_PI_2
#include "sql/dd/types/spatial_reference_system.h" // dd::Spatial_reference_system
#include "sql/gis/geometry_visitor.h"
namespace gis {
/// A visitor that checks if coordinates are within range for a spatial
/// reference system.
///
/// If a coordinate value is found to be out of range, the visitor returns
/// true. Otherwise, it returns false.
///
/// Checking stops on the first value found to be out of range. Cartesian
/// coordinates are always within range.
class Coordinate_range_visitor : public Nop_visitor {
private:
/// Spatial reference system of the geometry
const dd::Spatial_reference_system *m_srs;
/// Whether an out of range longitude value has been encountered
bool m_detected_longitude;
/// Whether an out of range latitude value has been encountered
bool m_detected_latitude;
/// The coordinate value that is out of range, in SRS unit
double m_coordinate;
public:
/// Construct a new coordinate range visitor.
///
/// @param srs The spatial reference system of the geometry.
Coordinate_range_visitor(const dd::Spatial_reference_system *srs)
: m_srs(srs),
m_detected_longitude(false),
m_detected_latitude(false),
m_coordinate(0.0) {}
/// Check if the visitor has detected any out of range longitude values.
///
/// @retval true At least one out of range longitude value.
/// @retval false All longitude values are within range.
bool longitude_out_of_range() const { return m_detected_longitude; }
/// Check if the visitor has detected any out of range latitude values.
///
/// @retval true At least one out of range latitude value.
/// @retval false All latitude values are within range.
bool latitude_out_of_range() const { return m_detected_latitude; }
/// Get the coordinate value that is out of range.
///
/// @return The coordinate value in the SRS unit.
double coordinate_value() const { return m_coordinate; }
using Nop_visitor::visit_enter;
bool visit_enter(Geometry *) override {
if (m_srs == nullptr || m_srs->is_cartesian())
return true; // Don't descend into each child.
return false;
}
using Nop_visitor::visit;
bool visit(Point *pt) override {
if (m_srs == nullptr || m_srs->is_cartesian())
return false; // Everything OK.
double lon = pt->x() - m_srs->prime_meridian() * m_srs->angular_unit();
if (!m_srs->positive_east()) lon *= -1.0;
if (lon <= -M_PI || lon > M_PI) {
m_detected_longitude = true;
m_coordinate = m_srs->from_radians(lon);
return true; // Out of range coordinate detected.
}
double lat = pt->y();
if (!m_srs->positive_north()) lat *= -1.0;
if (lat < -M_PI_2 || lat > M_PI_2) {
m_detected_latitude = true;
m_coordinate = m_srs->from_radians(lat);
return true; // Out of range coordinate detected.
}
return false; // Everything OK.
}
};
} // namespace gis
#endif // SQL_GIS_COORDINATE_RANGE_VISITOR_H_INCLUDED
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