Route.h

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#ifndef OSMSCOUT_ROUTE_OBJ_H
#define OSMSCOUT_ROUTE_OBJ_H
 
/*
  This source is part of the libosmscout library
  Copyright (C) 2020  Lukáš Karas
 
  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 <memory>
#include <unordered_map>
#include <mutex>
 
#include <osmscout/TypeConfig.h>
#include <osmscout/Way.h>
 
#include <osmscout/io/FileScanner.h>
#include <osmscout/io/FileWriter.h>
 
#include <osmscout/util/GeoBox.h>
#include <osmscout/util/Geometry.h>
 
#include <osmscout/system/Compiler.h>
 
namespace osmscout {

  class OSMSCOUT_API Route CLASS_FINAL
  {
  public:
    enum class MemberDirection {
      forward,
      backward
    };
 
    struct SegmentMember {
      MemberDirection direction{MemberDirection::forward};
      FileOffset way;
    };
 
    struct Segment {
      std::vector<SegmentMember> members;
    };
 
    using MemberCache=std::unordered_map<FileOffset,WayRef> ;
 
    std::vector<Segment> segments;
    GeoBox bbox;
 
  private:
    mutable std::mutex cacheMutex;
    MemberCache resolvedMembers; 
 
    FeatureValueBuffer featureValueBuffer;   
 
    FileOffset         fileOffset=0;         
    FileOffset         nextFileOffset=0;     
 
  public:
    Route() = default;
 
    FileOffset GetFileOffset() const
    {
      return fileOffset;
    }
 
    FileOffset GetNextFileOffset() const
    {
      return nextFileOffset;
    }
 
    std::vector<FileOffset> GetMemberOffsets() const;
 
    bool HasResolvedMembers() const
    {
      std::lock_guard<std::mutex> lock(cacheMutex);
      return !resolvedMembers.empty();
    }
 
    void SetResolvedMembers(const MemberCache &map)
    {
      std::lock_guard<std::mutex> lock(cacheMutex);
      this->resolvedMembers=map;
    }
 
    MemberCache GetResolvedMembers() const
    {
      std::lock_guard<std::mutex> lock(cacheMutex);
      return resolvedMembers;
    }
 
    // ObjectFileRef GetObjectFileRef() const
    // {
    //   return {fileOffset,refRoute};
    // }
 
    GeoBox GetBoundingBox() const
    {
      return bbox;
    }
 
    TypeInfoRef GetType() const
    {
      return featureValueBuffer.GetType();
    }
 
    size_t GetFeatureCount() const
    {
      return featureValueBuffer.GetType()->GetFeatureCount();
    }
 
    bool HasFeature(size_t idx) const
    {
      return featureValueBuffer.HasFeature(idx);
    }
 
    const FeatureInstance& GetFeature(size_t idx) const
    {
      return featureValueBuffer.GetType()->GetFeature(idx);
    }
 
    FeatureValue* GetFeatureValue(size_t idx) const
    {
      return featureValueBuffer.GetValue(idx);
    }
 
    void UnsetFeature(size_t idx)
    {
      featureValueBuffer.FreeValue(idx);
    }
 
    const FeatureValueBuffer& GetFeatureValueBuffer() const
    {
      return featureValueBuffer;
    }
 
    void SetType(const TypeInfoRef& type)
    {
      featureValueBuffer.SetType(type);
    }
 
    void SetFeatures(const FeatureValueBuffer& buffer)
    {
      featureValueBuffer.Set(buffer);
    }
 
    void Read(const TypeConfig& typeConfig,
              FileScanner& scanner);
 
    void Write(const TypeConfig& typeConfig,
               FileWriter& writer) const;
  };
 
  using RouteRef = std::shared_ptr<Route>;
}
 
#endif