/* Common middle layer interface */

/* Each middle layer data store must provide methods for

* storing and retrieving node and way data.

*/

#ifndef MIDDLE_H

#define MIDDLE_H

#include "osmtypes.hpp"

#include "options.hpp"

#include <vector>

struct middle_query_t {

virtual ~middle_query_t() {}

virtual int nodes_get_list(nodelist_t &out, const idlist_t nds) const = 0;

virtual int ways_get(osmid_t id, taglist_t &tags, nodelist_t &nodes) const = 0;

virtual int ways_get_list(const idlist_t &ids, idlist_t &way_ids,

multitaglist_t &tags,

multinodelist_t &nodes) const = 0;

virtual int relations_get(osmid_t id, memberlist_t &members, taglist_t &tags) const = 0;

virtual idlist_t relations_using_way(osmid_t way_id) const = 0;

virtual boost::shared_ptr<const middle_query_t> get_instance() const = 0;

};

struct middle_t : public middle_query_t {

static boost::shared_ptr<middle_t> create_middle(bool slim);

virtual ~middle_t() {}

virtual int start(const options_t *out_options_) = 0;

virtual void stop(void) = 0;

virtual void analyze(void) = 0;

virtual void end(void) = 0;

virtual void commit(void) = 0;

virtual int nodes_set(osmid_t id, double lat, double lon, const taglist_t &tags) = 0;

virtual int ways_set(osmid_t id, const idlist_t &nds, const taglist_t &tags) = 0;

virtual int relations_set(osmid_t id, const memberlist_t &members, const taglist_t &tags) = 0;

struct pending_processor {

virtual ~pending_processor() {}

virtual void enqueue_ways(osmid_t id) = 0;

virtual void process_ways() = 0;

virtual void enqueue_relations(osmid_t id) = 0;

virtual void process_relations() = 0;

};

virtual void iterate_ways(pending_processor& pf) = 0;

virtual void iterate_relations(pending_processor& pf) = 0;

virtual size_t pending_count() const = 0;

const options_t* out_options;

};

struct slim_middle_t : public middle_t {

virtual ~slim_middle_t() {}

virtual int nodes_delete(osmid_t id) = 0;

virtual int node_changed(osmid_t id) = 0;

virtual int ways_delete(osmid_t id) = 0;

virtual int way_changed(osmid_t id) = 0;

virtual int relations_delete(osmid_t id) = 0;

virtual int relation_changed(osmid_t id) = 0;

};

#endif