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200 lines (161 loc) · 5.69 KB
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/**
* SPDX-License-Identifier: GPL-2.0-or-later
*
* This file is part of osm2pgsql (https://osm2pgsql.org/).
*
* Copyright (C) 2006-2021 by the osm2pgsql developer community.
* For a full list of authors see the git log.
*/
#include "geom-transform.hpp"
#include "logging.hpp"
#include <osmium/osm.hpp>
#include <cstring>
#include <stdexcept>
bool geom_transform_point_t::is_compatible_with(
table_column_type geom_type) const noexcept
{
return geom_type == table_column_type::point ||
geom_type == table_column_type::geometry;
}
geom::osmium_builder_t::wkbs_t
geom_transform_point_t::run(geom::osmium_builder_t *builder,
table_column_type /*target_geom_type*/,
osmium::Node const &node) const
{
assert(builder);
return {builder->get_wkb_node(node.location())};
}
bool geom_transform_line_t::set_param(char const *name, lua_State *lua_state)
{
if (std::strcmp(name, "split_at") != 0) {
return false;
}
if (lua_type(lua_state, -1) != LUA_TNUMBER) {
throw std::runtime_error{
"The 'split_at' field in a geometry transformation "
"description must be a number."};
}
m_split_at = lua_tonumber(lua_state, -1);
return true;
}
bool geom_transform_line_t::is_compatible_with(
table_column_type geom_type) const noexcept
{
return geom_type == table_column_type::linestring ||
geom_type == table_column_type::multilinestring ||
geom_type == table_column_type::geometry;
}
geom::osmium_builder_t::wkbs_t
geom_transform_line_t::run(geom::osmium_builder_t *builder,
table_column_type /*target_geom_type*/,
osmium::Way *way) const
{
assert(builder);
assert(way);
return builder->get_wkb_line(way->nodes(), m_split_at);
}
geom::osmium_builder_t::wkbs_t
geom_transform_line_t::run(geom::osmium_builder_t *builder,
table_column_type /*target_geom_type*/,
osmium::Relation const & /*relation*/,
osmium::memory::Buffer const &buffer) const
{
assert(builder);
return builder->get_wkb_multiline(buffer, m_split_at);
}
bool geom_transform_area_t::set_param(char const *name, lua_State *lua_state)
{
if (std::strcmp(name, "multi") == 0) {
throw std::runtime_error{
"The 'multi' field in the geometry transformation has been"
" removed. See docs on how to use 'split_at' instead."};
}
if (std::strcmp(name, "split_at") != 0) {
return false;
}
char const *const val = lua_tostring(lua_state, -1);
if (!val) {
throw std::runtime_error{
"The 'split_at' field in a geometry transformation "
"description must be a string."};
}
if (std::strcmp(val, "multi") == 0) {
m_multi = false;
return true;
}
throw std::runtime_error{"Unknown value for 'split_at' field in a geometry"
" transformation: '{}'"_format(val)};
}
bool geom_transform_area_t::is_compatible_with(
table_column_type geom_type) const noexcept
{
return geom_type == table_column_type::polygon ||
geom_type == table_column_type::multipolygon ||
geom_type == table_column_type::geometry;
}
geom::osmium_builder_t::wkbs_t
geom_transform_area_t::run(geom::osmium_builder_t *builder,
table_column_type target_geom_type,
osmium::Way *way) const
{
assert(builder);
assert(way);
geom::osmium_builder_t::wkbs_t result;
if (!way->is_closed()) {
return result;
}
result.push_back(builder->get_wkb_polygon(*way));
if (result.front().empty()) {
result.clear();
} else if (target_geom_type == table_column_type::multipolygon) {
builder->wrap_in_multipolygon(&result);
}
return result;
}
geom::osmium_builder_t::wkbs_t
geom_transform_area_t::run(geom::osmium_builder_t *builder,
table_column_type target_geom_type,
osmium::Relation const &relation,
osmium::memory::Buffer const &buffer) const
{
assert(builder);
bool const wrap_multi = target_geom_type == table_column_type::multipolygon;
return builder->get_wkb_multipolygon(relation, buffer, m_multi, wrap_multi);
}
std::unique_ptr<geom_transform_t> create_geom_transform(char const *type)
{
if (std::strcmp(type, "point") == 0) {
return std::make_unique<geom_transform_point_t>();
}
if (std::strcmp(type, "line") == 0) {
return std::make_unique<geom_transform_line_t>();
}
if (std::strcmp(type, "area") == 0) {
return std::make_unique<geom_transform_area_t>();
}
throw std::runtime_error{
"Unknown geometry transformation '{}'."_format(type)};
}
void init_geom_transform(geom_transform_t *transform, lua_State *lua_state)
{
static bool show_warning = true;
assert(transform);
assert(lua_state);
lua_pushnil(lua_state);
while (lua_next(lua_state, -2) != 0) {
char const *const field = lua_tostring(lua_state, -2);
if (field == nullptr) {
throw std::runtime_error{"All fields in geometry transformation "
"description must have string keys."};
}
if (std::strcmp(field, "create") != 0) {
if (!transform->set_param(field, lua_state) && show_warning) {
log_warn("Ignoring unknown field '{}' in geometry "
"transformation description.",
field);
show_warning = false;
}
}
lua_pop(lua_state, 1);
}
}