object_pointer_collection.hpp

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#ifndef OSMIUM_OBJECT_POINTER_COLLECTION_HPP
#define OSMIUM_OBJECT_POINTER_COLLECTION_HPP
 
/*
 
This file is part of Osmium (https://osmcode.org/libosmium).
 
Copyright 2013-2023 Jochen Topf <jochen@topf.org> and others (see README).
 
Boost Software License - Version 1.0 - August 17th, 2003
 
Permission is hereby granted, free of charge, to any person or organization
obtaining a copy of the software and accompanying documentation covered by
this license (the "Software") to use, reproduce, display, distribute,
execute, and transmit the Software, and to prepare derivative works of the
Software, and to permit third-parties to whom the Software is furnished to
do so, all subject to the following:
 
The copyright notices in the Software and this entire statement, including
the above license grant, this restriction and the following disclaimer,
must be included in all copies of the Software, in whole or in part, and
all derivative works of the Software, unless such copies or derivative
works are solely in the form of machine-executable object code generated by
a source language processor.
 
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE, TITLE AND NON-INFRINGEMENT. IN NO EVENT
SHALL THE COPYRIGHT HOLDERS OR ANYONE DISTRIBUTING THE SOFTWARE BE LIABLE
FOR ANY DAMAGES OR OTHER LIABILITY, WHETHER IN CONTRACT, TORT OR OTHERWISE,
ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
DEALINGS IN THE SOFTWARE.
 
*/
 
#include <osmium/handler.hpp>
#include <osmium/osm/object.hpp>
 
#include <algorithm>
#include <utility>
#include <vector>
 
// IWYU pragma: no_forward_declare osmium::OSMObject
 
namespace osmium {
 
    template <typename TBaseIterator, typename TValue>
    class indirect_iterator : public TBaseIterator {
 
    public:
 
        using iterator_category = std::random_access_iterator_tag;
        using value_type        = TValue;
        using difference_type   = std::ptrdiff_t;
        using pointer           = value_type*;
        using reference         = value_type&;
 
        explicit indirect_iterator(TBaseIterator it) :
            TBaseIterator(it) {
        }
 
        reference operator*() const noexcept {
            return *TBaseIterator::operator*();
        }
 
        pointer operator->() const noexcept {
            return &*TBaseIterator::operator*();
        }
 
    }; // class indirect_iterator
 
    class ObjectPointerCollection : public osmium::handler::Handler {
 
        std::vector<osmium::OSMObject*> m_objects{};
 
    public:
 
        using iterator       = indirect_iterator<std::vector<osmium::OSMObject*>::iterator, osmium::OSMObject>;
        using const_iterator = indirect_iterator<std::vector<osmium::OSMObject*>::const_iterator, const osmium::OSMObject>;
 
        using ptr_iterator = std::vector<osmium::OSMObject*>::iterator;
 
        ObjectPointerCollection() = default;
 
        void osm_object(osmium::OSMObject& object) {
            m_objects.push_back(&object);
        }
 
        template <typename TCompare>
        void sort(TCompare&& compare) {
            std::stable_sort(m_objects.begin(), m_objects.end(), std::forward<TCompare>(compare));
        }
 
        template <typename TEqual>
        void unique(TEqual&& equal) {
            const auto last = std::unique(m_objects.begin(), m_objects.end(), std::forward<TEqual>(equal));
            m_objects.erase(last, m_objects.end());
        }
 
        bool empty() const noexcept {
            return m_objects.empty();
        }
 
        std::size_t size() const noexcept {
            return m_objects.size();
        }
 
        void clear() {
            m_objects.clear();
        }
 
        iterator begin() {
            return iterator{m_objects.begin()};
        }
 
        iterator end() {
            return iterator{m_objects.end()};
        }
 
        const_iterator cbegin() const {
            return const_iterator{m_objects.cbegin()};
        }
 
        const_iterator cend() const {
            return const_iterator{m_objects.cend()};
        }
 
        ptr_iterator ptr_begin() noexcept {
            return m_objects.begin();
        }
 
        ptr_iterator ptr_end() noexcept {
            return m_objects.end();
        }
 
    }; // class ObjectPointerCollection
 
} // namespace osmium
 
#endif // OSMIUM_OBJECT_POINTER_COLLECTION_HPP