137 lines
5.2 KiB
C++
137 lines
5.2 KiB
C++
/*
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Copyright (c) 2015, Project OSRM contributors
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All rights reserved.
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Redistribution and use in source and binary forms, with or without modification,
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are permitted provided that the following conditions are met:
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Redistributions of source code must retain the above copyright notice, this list
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of conditions and the following disclaimer.
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Redistributions in binary form must reproduce the above copyright notice, this
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list of conditions and the following disclaimer in the documentation and/or
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other materials provided with the distribution.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
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ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR
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ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
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ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef BASE_PLUGIN_HPP
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#define BASE_PLUGIN_HPP
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#include "../data_structures/phantom_node.hpp"
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#include <osrm/coordinate.hpp>
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#include <osrm/json_container.hpp>
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#include <osrm/route_parameters.hpp>
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#include <algorithm>
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#include <string>
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#include <vector>
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class BasePlugin
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{
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public:
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enum class Status : int
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{
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Ok = 200,
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EmptyResult = 207,
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NoSegment = 208,
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Error = 400
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};
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BasePlugin() {}
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// Maybe someone can explain the pure virtual destructor thing to me (dennis)
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virtual ~BasePlugin() {}
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virtual const std::string GetDescriptor() const = 0;
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virtual Status HandleRequest(const RouteParameters &, osrm::json::Object &) = 0;
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virtual bool check_all_coordinates(const std::vector<FixedPointCoordinate> &coordinates,
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const unsigned min = 2) const final
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{
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if (min > coordinates.size() || std::any_of(std::begin(coordinates), std::end(coordinates),
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[](const FixedPointCoordinate &coordinate)
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{
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return !coordinate.is_valid();
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}))
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{
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return false;
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}
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return true;
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}
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// Decides whether to use the phantom node from a big or small component if both are found.
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// Returns true if all phantom nodes are in the same component after snapping.
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std::vector<PhantomNode> snapPhantomNodes(
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const std::vector<std::pair<PhantomNode, PhantomNode>> &phantom_node_pair_list) const
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{
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const auto check_component_id_is_tiny =
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[](const std::pair<PhantomNode, PhantomNode> &phantom_pair)
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{
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return phantom_pair.first.component.is_tiny;
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};
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// are all phantoms from a tiny cc?
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const auto check_all_in_same_component =
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[](const std::vector<std::pair<PhantomNode, PhantomNode>> &nodes)
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{
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const auto component_id = nodes.front().first.component.id;
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return std::all_of(std::begin(nodes), std::end(nodes),
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[component_id](const PhantomNodePair &phantom_pair)
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{
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return component_id == phantom_pair.first.component.id;
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});
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};
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const auto fallback_to_big_component =
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[](const std::pair<PhantomNode, PhantomNode> &phantom_pair)
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{
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if (phantom_pair.first.component.is_tiny && phantom_pair.second.is_valid() &&
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!phantom_pair.second.component.is_tiny)
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{
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return phantom_pair.second;
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}
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return phantom_pair.first;
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};
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const auto use_closed_phantom = [](const std::pair<PhantomNode, PhantomNode> &phantom_pair)
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{
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return phantom_pair.first;
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};
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const bool every_phantom_is_in_tiny_cc =
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std::all_of(std::begin(phantom_node_pair_list), std::end(phantom_node_pair_list),
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check_component_id_is_tiny);
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auto all_in_same_component = check_all_in_same_component(phantom_node_pair_list);
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std::vector<PhantomNode> snapped_phantoms;
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snapped_phantoms.reserve(phantom_node_pair_list.size());
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// The only case we don't snap to the big component if all phantoms are in the same small
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// component
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if (every_phantom_is_in_tiny_cc && all_in_same_component)
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{
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std::transform(phantom_node_pair_list.begin(), phantom_node_pair_list.end(),
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std::back_inserter(snapped_phantoms), use_closed_phantom);
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}
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else
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{
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std::transform(phantom_node_pair_list.begin(), phantom_node_pair_list.end(),
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std::back_inserter(snapped_phantoms), fallback_to_big_component);
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}
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return snapped_phantoms;
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}
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};
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#endif /* BASE_PLUGIN_HPP */
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