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// Boost.Geometry (aka GGL, Generic Geometry Library)
// Copyright (c) 2015, Oracle and/or its affiliates.
// Contributed and/or modified by Menelaos Karavelas, on behalf of Oracle
// Licensed under the Boost Software License version 1.0.
// http://www.boost.org/users/license.html
#ifndef BOOST_GEOMETRY_POLICIES_IS_VALID_FAILING_REASON_POLICY_HPP
#define BOOST_GEOMETRY_POLICIES_IS_VALID_FAILING_REASON_POLICY_HPP
#include <sstream>
#include <boost/geometry/io/dsv/write.hpp>
#include <boost/geometry/util/range.hpp>
#include <boost/geometry/algorithms/validity_failure_type.hpp>
#include <boost/geometry/algorithms/detail/overlay/debug_turn_info.hpp>
namespace boost { namespace geometry
{
inline char const* validity_failure_type_message(validity_failure_type failure)
{
switch (failure)
{
case no_failure:
return "Geometry is valid";
case failure_few_points:
return "Geometry has too few points";
case failure_wrong_topological_dimension:
return "Geometry has wrong topological dimension";
case failure_not_closed:
return "Geometry is defined as closed but is open";
case failure_spikes:
return "Geometry has spikes";
case failure_self_intersections:
return "Geometry has invalid self-intersections";
case failure_wrong_orientation:
return "Geometry has wrong orientation";
case failure_interior_rings_outside:
return "Geometry has interior rings defined outside the outer boundary";
case failure_nested_interior_rings:
return "Geometry has nested interior rings";
case failure_disconnected_interior:
return "Geometry has disconnected interior";
case failure_intersecting_interiors:
return "Multi-polygon has intersecting interiors";
case failure_duplicate_points:
return "Geometry has duplicate (consecutive) points";
case failure_wrong_corner_order:
return "Box has corners in wrong order";
default: // to avoid -Wreturn-type warning
return "";
}
}
template <bool AllowDuplicates = true, bool AllowSpikes = true>
class failing_reason_policy
{
private:
static inline
validity_failure_type transform_failure_type(validity_failure_type failure)
{
if (AllowDuplicates && failure == failure_duplicate_points)
{
return no_failure;
}
return failure;
}
static inline
validity_failure_type transform_failure_type(validity_failure_type failure,
bool is_linear)
{
if (is_linear && AllowSpikes && failure == failure_spikes)
{
return no_failure;
}
return transform_failure_type(failure);
}
inline void set_failure_message(validity_failure_type failure)
{
m_oss.str("");
m_oss.clear();
m_oss << validity_failure_type_message(failure);
}
template
<
validity_failure_type Failure,
typename Data1,
typename Data2 = Data1,
typename Dummy = void
>
struct process_data
{
static inline void apply(std::ostringstream&, Data1 const&)
{
}
static inline void apply(std::ostringstream&,
Data1 const&,
Data2 const&)
{
}
};
template <typename SpikePoint>
struct process_data<failure_spikes, bool, SpikePoint>
{
static inline void apply(std::ostringstream& oss,
bool is_linear,
SpikePoint const& spike_point)
{
if (is_linear && AllowSpikes)
{
return;
}
oss << ". A spike point was found with apex at "
<< geometry::dsv(spike_point);
}
};
template <typename Turns>
struct process_data<failure_self_intersections, Turns>
{
static inline
void apply_to_segment_identifier(std::ostringstream& oss,
segment_identifier seg_id)
{
oss << "{" << seg_id.source_index
<< ", " << seg_id.multi_index
<< ", " << seg_id.ring_index
<< ", " << seg_id.segment_index
<< "}";
}
static inline void apply(std::ostringstream& oss,
Turns const& turns)
{
typedef typename boost::range_value<Turns>::type turn_type;
turn_type const& turn = range::front(turns);
oss << ". A self-intersection point was found at "
<< geometry::dsv(turn.point);
oss << "; method: " << method_char(turn.method)
<< "; operations: "
<< operation_char(turn.operations[0].operation)
<< "/"
<< operation_char(turn.operations[1].operation)
<< "; segment IDs {source, multi, ring, segment}: ";
apply_to_segment_identifier(oss, turn.operations[0].seg_id);
oss << "/";
apply_to_segment_identifier(oss, turn.operations[1].seg_id);
}
};
template <typename Point>
struct process_data<failure_duplicate_points, Point>
{
static inline void apply(std::ostringstream& oss,
Point const& point)
{
if (AllowDuplicates)
{
return;
}
oss << ". Duplicate points were found near point "
<< geometry::dsv(point);
}
};
public:
failing_reason_policy(std::ostringstream& oss)
: m_oss(oss)
{}
template <validity_failure_type Failure>
inline bool apply()
{
validity_failure_type const failure = transform_failure_type(Failure);
set_failure_message(failure);
return failure == no_failure;
}
template <validity_failure_type Failure, typename Data>
inline bool apply(Data const& data)
{
validity_failure_type const failure = transform_failure_type(Failure);
set_failure_message(failure);
process_data<Failure, Data>::apply(m_oss, data);
return failure == no_failure;
}
template <validity_failure_type Failure, typename Data1, typename Data2>
inline bool apply(Data1 const& data1, Data2 const& data2)
{
validity_failure_type const failure
= transform_failure_type(Failure, data1);
set_failure_message(failure);
process_data<Failure, Data1, Data2>::apply(m_oss, data1, data2);
return failure == no_failure;
}
private:
std::ostringstream& m_oss;
};
}} // namespace boost::geometry
#endif // BOOST_GEOMETRY_POLICIES_IS_VALID_FAILING_REASON_POLICY_HPP
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