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/******************************************************************************
*
* Project: OpenGIS Simple Features Reference Implementation
* Purpose: Streaming parser for GeoJSON-like FeatureCollection
* Author: Even Rouault <even.rouault at spatialys.com>
*
******************************************************************************
* Copyright (c) 2017, Even Rouault <even.rouault at spatialys.com>
*
* SPDX-License-Identifier: MIT
****************************************************************************/
#ifndef OGRJSONCOLLECTIONSTREAMING_PARSER_H_INCLUDED
#define OGRJSONCOLLECTIONSTREAMING_PARSER_H_INCLUDED
#include "cpl_json_streaming_parser.h"
#include <json.h> // JSON-C
/************************************************************************/
/* OGRJSONCollectionStreamingParser */
/************************************************************************/
/** Streaming parser for GeoJSON-like FeatureCollection */
class OGRJSONCollectionStreamingParser CPL_NON_FINAL
: public CPLJSonStreamingParser
{
bool m_bFirstPass = false;
int m_nDepth = 0;
bool m_bInFeatures = false;
bool m_bCanEasilyAppend = false;
bool m_bInFeaturesArray = false;
bool m_bInCoordinates = false;
bool m_bInType = false;
bool m_bIsTypeKnown = false;
bool m_bIsFeatureCollection = false;
json_object *m_poRootObj = nullptr;
size_t m_nRootObjMemEstimate = 0;
json_object *m_poCurObj = nullptr;
size_t m_nCurObjMemEstimate = 0;
GUIntBig m_nTotalOGRFeatureMemEstimate = 0;
bool m_bKeySet = false;
std::string m_osCurKey{};
std::vector<json_object *> m_apoCurObj{};
std::vector<bool> m_abFirstMember{};
bool m_bStoreNativeData = false;
std::string m_osJson{};
size_t m_nMaxObjectSize = 0;
bool m_bStartFeature = false;
bool m_bEndFeature = false;
void AppendObject(json_object *poNewObj);
CPL_DISALLOW_COPY_ASSIGN(OGRJSONCollectionStreamingParser)
protected:
inline bool IsFirstPass() const
{
return m_bFirstPass;
}
virtual void GotFeature(json_object *poObj, bool bFirstPass,
const std::string &osJson) = 0;
virtual void TooComplex() = 0;
public:
OGRJSONCollectionStreamingParser(bool bFirstPass, bool bStoreNativeData,
size_t nMaxObjectSize);
~OGRJSONCollectionStreamingParser();
virtual void String(const char * /*pszValue*/, size_t) override;
virtual void Number(const char * /*pszValue*/, size_t) override;
virtual void Boolean(bool b) override;
virtual void Null() override;
virtual void StartObject() override;
virtual void EndObject() override;
virtual void StartObjectMember(const char * /*pszKey*/, size_t) override;
virtual void StartArray() override;
virtual void EndArray() override;
virtual void StartArrayMember() override;
virtual void Exception(const char * /*pszMessage*/) override;
json_object *StealRootObject();
inline bool IsTypeKnown() const
{
return m_bIsTypeKnown;
}
inline bool IsFeatureCollection() const
{
return m_bIsFeatureCollection;
}
inline GUIntBig GetTotalOGRFeatureMemEstimate() const
{
return m_nTotalOGRFeatureMemEstimate;
}
inline bool CanEasilyAppend() const
{
return m_bCanEasilyAppend;
}
inline void ResetFeatureDetectionState()
{
m_bStartFeature = false;
m_bEndFeature = false;
}
inline bool IsStartFeature() const
{
return m_bStartFeature;
}
inline bool IsEndFeature() const
{
return m_bEndFeature;
}
};
#endif // OGRJSONCOLLECTIONSTREAMING_PARSER_H_INCLUDED
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