/usr/include/osmium/storage/objectstore.hpp is in libosmium-dev 0.0~20140910-9a069af-1+b1.
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#define OSMIUM_STORAGE_OBJECTSTORE_HPP
/*
Copyright 2012 Jochen Topf <jochen@topf.org> and others (see README).
This file is part of Osmium (https://github.com/joto/osmium).
Osmium is free software: you can redistribute it and/or modify it under the
terms of the GNU Lesser General Public License or (at your option) the GNU
General Public License as published by the Free Software Foundation, either
version 3 of the Licenses, or (at your option) any later version.
Osmium is distributed in the hope that it will be useful, but WITHOUT ANY
WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A
PARTICULAR PURPOSE. See the GNU Lesser General Public License and the GNU
General Public License for more details.
You should have received a copy of the Licenses along with Osmium. If not, see
<http://www.gnu.org/licenses/>.
*/
#include <algorithm>
#include <set>
#include <boost/bind.hpp>
#include <osmium/handler.hpp>
namespace Osmium {
namespace Storage {
/**
* Stores Nodes, Ways, and Relations in main memory. Can store multiple
* versions of the same object. Storage is ordered by id and version.
* Stored objects are const, they can not be changed.
*
* The object store uses the handler interface, so storage is simply by
* calling the node(), way(), and relation() methods like in any other
* handler.
*
* Note that Osmium OSM objects are rather larger, so this store can use
* a lot of memory. In many cases you don't need the whole object but only
* parts of it, so using a more space efficient storage might be possible.
*/
class ObjectStore : public Osmium::Handler::Base {
public:
ObjectStore() :
Base(),
m_nodes(),
m_ways(),
m_relations() {
}
/**
* Insert shared_ptr of Node into object store.
*/
void node(const shared_ptr<Osmium::OSM::Node const>& node) {
m_nodes.insert(node);
}
/**
* Insert shared_ptr of Way into object store.
*/
void way(const shared_ptr<Osmium::OSM::Way const>& way) {
m_ways.insert(way);
}
/**
* Insert shared_ptr of Relation into object store.
*/
void relation(const shared_ptr<Osmium::OSM::Relation const>& relation) {
m_relations.insert(relation);
}
/**
* Remove all nodes from object store.
*/
void clear_nodes() {
m_nodes.clear();
}
/**
* Remove all ways from object store.
*/
void clear_ways() {
m_ways.clear();
}
/**
* Remove all relations from object store.
*/
void clear_relations() {
m_relations.clear();
}
/**
* Remove all objects from object store.
*/
void clear() {
clear_nodes();
clear_ways();
clear_relations();
}
/**
* Feed contents of object store to the given handler. Because
* objects are stored ordered by id and version, they will be
* fed to the handler in order.
*
* If clear is set, all nodes/ways/relations are removed from the
* object store after the after_nodes/ways/relations() call to the
* handler.
*
* @tparam THandler Handler class.
* @param handler Pointer to handler.
* @param meta Reference to Osmium::OSM::Meta object which will be given to init() method of handler.
* @param clear Should objects be cleared from the object store? Default is true.
*/
template <class THandler>
void feed_to(THandler* handler, Osmium::OSM::Meta& meta, bool clear=true) {
handler->init(meta);
handler->before_nodes();
std::for_each(m_nodes.begin(), m_nodes.end(), boost::bind(&THandler::node, handler, _1));
handler->after_nodes();
if (clear) {
clear_nodes();
}
handler->before_ways();
std::for_each(m_ways.begin(), m_ways.end(), boost::bind(&THandler::way, handler, _1));
handler->after_ways();
if (clear) {
clear_ways();
}
handler->before_relations();
std::for_each(m_relations.begin(), m_relations.end(), boost::bind(&THandler::relation, handler, _1));
handler->after_relations();
if (clear) {
clear_relations();
}
handler->final();
}
private:
typedef std::set<shared_ptr<Osmium::OSM::Node const> > nodeset;
typedef std::set<shared_ptr<Osmium::OSM::Way const> > wayset;
typedef std::set<shared_ptr<Osmium::OSM::Relation const> > relationset;
nodeset m_nodes;
wayset m_ways;
relationset m_relations;
public:
/**
* Handler that inserts objects from the store in the right
* position in the stream of objects it gets and forwards all
* objects to another handler.
*
* Do not change the object store while this handler is active.
*/
template <class THandler>
class ApplyHandler : public Osmium::Handler::Forward<THandler> {
public:
ApplyHandler(ObjectStore& object_store, THandler& handler, Osmium::OSM::Meta& meta) :
Osmium::Handler::Forward<THandler>(handler),
m_object_store(object_store),
m_handler(handler),
m_meta(meta),
m_nodes_iter(object_store.m_nodes.begin()),
m_nodes_end(object_store.m_nodes.end()),
m_ways_iter(object_store.m_ways.begin()),
m_ways_end(object_store.m_ways.end()),
m_relations_iter(object_store.m_relations.begin()),
m_relations_end(object_store.m_relations.end()) {
}
void init(const Osmium::OSM::Meta&) {
m_handler.init(m_meta);
}
void node(const shared_ptr<Osmium::OSM::Node>& node) {
while (m_nodes_iter != m_nodes_end && **m_nodes_iter < *node) {
m_handler.node(*m_nodes_iter++);
}
m_handler.node(node);
}
void after_nodes() {
while (m_nodes_iter != m_nodes_end) {
m_handler.node(*m_nodes_iter++);
}
m_handler.after_nodes();
m_object_store.clear_nodes();
}
void way(const shared_ptr<Osmium::OSM::Way>& way) {
while (m_ways_iter != m_ways_end && **m_ways_iter < *way) {
m_handler.way(*m_ways_iter++);
}
m_handler.way(way);
}
void after_ways() {
while (m_ways_iter != m_ways_end) {
m_handler.way(*m_ways_iter++);
}
m_handler.after_ways();
m_object_store.clear_ways();
}
void relation(const shared_ptr<Osmium::OSM::Relation>& relation) {
while (m_relations_iter != m_relations_end && **m_relations_iter < *relation) {
m_handler.relation(*m_relations_iter++);
}
m_handler.relation(relation);
}
void after_relations() {
while (m_relations_iter != m_relations_end) {
m_handler.relation(*m_relations_iter++);
}
m_handler.after_relations();
m_object_store.clear_relations();
}
private:
ObjectStore& m_object_store;
THandler& m_handler;
Osmium::OSM::Meta& m_meta;
ObjectStore::nodeset::iterator m_nodes_iter;
ObjectStore::nodeset::iterator m_nodes_end;
ObjectStore::wayset::iterator m_ways_iter;
ObjectStore::wayset::iterator m_ways_end;
ObjectStore::relationset::iterator m_relations_iter;
ObjectStore::relationset::iterator m_relations_end;
}; // class ApplyHandler
}; // class ObjectStore
} // namespace Storage
} // namespace Osmium
#endif // OSMIUM_STORAGE_OBJECTSTORE_HPP
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