GenMergeAreas.h

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#ifndef OSMSCOUT_IMPORT_GENMERGEAREAS_H
#define OSMSCOUT_IMPORT_GENMERGEAREAS_H

/*
  This source is part of the libosmscout library
  Copyright (C) 2013  Tim Teulings

  This library is free software; you can redistribute it and/or
  modify it under the terms of the GNU Lesser General Public
  License as published by the Free Software Foundation; either
  version 2.1 of the License, or (at your option) any later version.

  This library 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 for more details.

  You should have received a copy of the GNU Lesser General Public
  License along with this library; if not, write to the Free Software
  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307  USA
*/

#include <list>
#include <set>
#include <unordered_map>
#include <unordered_set>

#include <osmscout/TypeInfoSet.h>

#include <osmscout/Area.h>
#include <osmscout/Way.h>

#include <osmscout/import/ImportFeatures.h>
#include <osmscout/import/Import.h>

#include <osmscout/util/NodeUseMap.h>

#include <osmscout/system/Compiler.h>

namespace osmscout {

  struct AreaMergeJob
  {
    TypeInfoRef            type;
    std::unordered_set<Id> nodeUseSet;
    size_t                 areaCount;  
    std::list<AreaRef>     areas;      
  };

  struct AreaMergeResult
  {
    TypeInfoRef                    type;
    std::list<AreaRef>             merges;     
    std::unordered_set<FileOffset> mergedAway; 
  };

  class MergeAreasGenerator CLASS_FINAL : public ImportModule
  {
  public:
    static const char* const AREAS2_TMP;

  private:
    void GetAreas(const ImportParameter& parameter,
                  Progress& progress,
                  const TypeConfig& typeConfig,
                  const TypeInfoSet& candidateTypes,
                  TypeInfoSet& loadedTypes,
                  FileScanner& scanner,
                  std::vector<AreaMergeJob>& mergeJobs);

    void WriteMergeResult(Progress& progress,
                          const TypeConfig& typeConfig,
                          FileScanner& scanner,
                          FileWriter& writer,
                          const TypeInfoSet& loadedTypes,
                          const std::vector<AreaMergeResult>& mergeJob,
                          uint32_t& areasWritten);

  public:
    void GetDescription(const ImportParameter& parameter,
                        ImportModuleDescription& description) const override;

    bool Import(const TypeConfigRef& typeConfig,
                const ImportParameter& parameter,
                Progress& progress) override;
  };
}

#endif