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Allow no sources and no destinations for full table query

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Daniel J. Hofmann 2016-03-02 17:23:35 +01:00 committed by Patrick Niklaus
parent ce1ca1b625
commit e90b1bbead
1 changed files with 28 additions and 17 deletions
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45
include/engine/plugins/distance_table.hpp
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@ -43,6 +43,13 @@ template <class DataFacadeT> class DistanceTablePlugin final : public BasePlugin
Status HandleRequest(const RouteParameters &route_parameters,
util::json::Object &json_result) override final
{
return NonConstHandleRequest(route_parameters, json_result);
}
// XXX: should be const-ref, but we need to artificially source, destination values
// so consider this a hack for 4.9, in 5.0 we refactored and handle it beautifully!
Status NonConstHandleRequest(RouteParameters route_parameters, util::json::Object &json_result)
{
if (!check_all_coordinates(route_parameters.coordinates))
{
@ -59,32 +66,36 @@ template <class DataFacadeT> class DistanceTablePlugin final : public BasePlugin
return Status::Error;
}
const auto number_of_coordinates = route_parameters.coordinates.size();
BOOST_ASSERT(route_parameters.is_source.size() <= number_of_coordinates);
BOOST_ASSERT(route_parameters.is_destination.size() <= number_of_coordinates);
// The check_all_coordinates guard above makes sure we have at least 2 coordinates.
// This guard makes sure is_source, is_destination, coordinates are parallel arrays.
if (route_parameters.is_source.size() != route_parameters.coordinates.size() ||
route_parameters.is_destination.size() != route_parameters.coordinates.size())
// This establishes the parallel array invariant for is_source, is_destination, coordinates
if (route_parameters.is_source.size() == 0)
{
json_result.values["status_message"] =
"Number of sources and destinations does not match number of coordinates";
return Status::Error;
const auto where = route_parameters.is_source.end();
const auto n = number_of_coordinates - route_parameters.is_source.size();
route_parameters.is_source.insert(where, n, true);
}
if (route_parameters.is_destination.size() == 0)
{
const auto where = route_parameters.is_destination.end();
const auto n = number_of_coordinates - route_parameters.is_destination.size();
route_parameters.is_destination.insert(where, n, true);
}
// parallel array invariant
BOOST_ASSERT(route_parameters.coordinates.size() == route_parameters.is_source.size());
BOOST_ASSERT(route_parameters.coordinates.size() == route_parameters.is_destination.size());
const auto number_of_sources = std::count(route_parameters.is_source.begin(), //
route_parameters.is_source.end(), true);
const auto number_of_destination = std::count(route_parameters.is_destination.begin(), //
route_parameters.is_destination.end(), true);
// At this point we know that we
// - have at least n=2 coordinates and
// - have n booleans in is_source and n booleans in is_destination
// This guard makes sure we have at least one source and one target.
if (number_of_sources < 1 || number_of_destination < 1)
{
json_result.values["status_message"] =
"At least one source and one destination required";
return Status::Error;
}
if (max_locations_distance_table > 0 &&
(number_of_sources * number_of_destination >
max_locations_distance_table * max_locations_distance_table))