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ogrgeojsonwriter.cpp
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ogrgeojsonwriter.cpp
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/******************************************************************************
*
* Project: OpenGIS Simple Features Reference Implementation
* Purpose: Implementation of GeoJSON writer utilities (OGR GeoJSON Driver).
* Author: Mateusz Loskot, mateusz@loskot.net
*
******************************************************************************
* Copyright (c) 2007, Mateusz Loskot
* Copyright (c) 2008-2014, Even Rouault <even dot rouault at spatialys.com>
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included
* in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
* DEALINGS IN THE SOFTWARE.
****************************************************************************/
#define JSON_C_VER_013 (13 << 8)
#include "ogrgeojsonwriter.h"
#include "ogrgeojsonutils.h"
#include "ogr_geojson.h"
#include "ogrgeojsonreader.h"
#include <json.h> // JSON-C
#if (!defined(JSON_C_VERSION_NUM)) || (JSON_C_VERSION_NUM < JSON_C_VER_013)
#include <json_object_private.h>
#endif
#include <printbuf.h>
#include "ogr_api.h"
#include "ogr_p.h"
#include <algorithm>
#include <cstdint>
static json_object *
json_object_new_float_with_significant_figures(float fVal,
int nSignificantFigures);
/************************************************************************/
/* SetRFC7946Settings() */
/************************************************************************/
/*! @cond Doxygen_Suppress */
void OGRGeoJSONWriteOptions::SetRFC7946Settings()
{
bBBOXRFC7946 = true;
if (nCoordPrecision < 0)
nCoordPrecision = 7;
bPolygonRightHandRule = true;
bCanPatchCoordinatesWithNativeData = false;
bHonourReservedRFC7946Members = true;
}
void OGRGeoJSONWriteOptions::SetIDOptions(CSLConstList papszOptions)
{
osIDField = CSLFetchNameValueDef(papszOptions, "ID_FIELD", "");
const char *pszIDFieldType = CSLFetchNameValue(papszOptions, "ID_TYPE");
if (pszIDFieldType)
{
if (EQUAL(pszIDFieldType, "String"))
{
bForceIDFieldType = true;
eForcedIDFieldType = OFTString;
}
else if (EQUAL(pszIDFieldType, "Integer"))
{
bForceIDFieldType = true;
eForcedIDFieldType = OFTInteger64;
}
}
bGenerateID =
CPL_TO_BOOL(CSLFetchBoolean(papszOptions, "ID_GENERATE", false));
}
/*! @endcond */
/************************************************************************/
/* json_object_new_coord() */
/************************************************************************/
static json_object *
json_object_new_coord(double dfVal, const OGRGeoJSONWriteOptions &oOptions)
{
// If coordinate precision is specified, or significant figures is not
// then use the '%f' formatting.
if (oOptions.nCoordPrecision >= 0 || oOptions.nSignificantFigures < 0)
return json_object_new_double_with_precision(dfVal,
oOptions.nCoordPrecision);
return json_object_new_double_with_significant_figures(
dfVal, oOptions.nSignificantFigures);
}
/************************************************************************/
/* OGRGeoJSONIsPatchablePosition() */
/************************************************************************/
static bool OGRGeoJSONIsPatchablePosition(json_object *poJSonCoordinates,
json_object *poNativeCoordinates)
{
return json_object_get_type(poJSonCoordinates) == json_type_array &&
json_object_get_type(poNativeCoordinates) == json_type_array &&
json_object_array_length(poJSonCoordinates) == 3 &&
json_object_array_length(poNativeCoordinates) >= 4 &&
json_object_get_type(json_object_array_get_idx(
poJSonCoordinates, 0)) != json_type_array &&
json_object_get_type(json_object_array_get_idx(
poNativeCoordinates, 0)) != json_type_array;
}
/************************************************************************/
/* OGRGeoJSONIsCompatiblePosition() */
/************************************************************************/
static bool OGRGeoJSONIsCompatiblePosition(json_object *poJSonCoordinates,
json_object *poNativeCoordinates)
{
return json_object_get_type(poJSonCoordinates) == json_type_array &&
json_object_get_type(poNativeCoordinates) == json_type_array &&
json_object_array_length(poJSonCoordinates) ==
json_object_array_length(poNativeCoordinates) &&
json_object_get_type(json_object_array_get_idx(
poJSonCoordinates, 0)) != json_type_array &&
json_object_get_type(json_object_array_get_idx(
poNativeCoordinates, 0)) != json_type_array;
}
/************************************************************************/
/* OGRGeoJSONPatchPosition() */
/************************************************************************/
static void OGRGeoJSONPatchPosition(json_object *poJSonCoordinates,
json_object *poNativeCoordinates)
{
const auto nLength = json_object_array_length(poNativeCoordinates);
for (auto i = decltype(nLength){3}; i < nLength; i++)
{
json_object_array_add(
poJSonCoordinates,
json_object_get(json_object_array_get_idx(poNativeCoordinates, i)));
}
}
/************************************************************************/
/* OGRGeoJSONIsPatchableArray() */
/************************************************************************/
static bool OGRGeoJSONIsPatchableArray(json_object *poJSonArray,
json_object *poNativeArray, int nDepth)
{
if (nDepth == 0)
return OGRGeoJSONIsPatchablePosition(poJSonArray, poNativeArray);
if (json_object_get_type(poJSonArray) == json_type_array &&
json_object_get_type(poNativeArray) == json_type_array)
{
const auto nLength = json_object_array_length(poJSonArray);
if (nLength == json_object_array_length(poNativeArray))
{
if (nLength > 0)
{
json_object *poJSonChild =
json_object_array_get_idx(poJSonArray, 0);
json_object *poNativeChild =
json_object_array_get_idx(poNativeArray, 0);
if (!OGRGeoJSONIsPatchableArray(poJSonChild, poNativeChild,
nDepth - 1))
{
return false;
}
// Light check as a former extensive check was done in
// OGRGeoJSONComputePatchableOrCompatibleArray
}
return true;
}
}
return false;
}
/************************************************************************/
/* OGRGeoJSONComputePatchableOrCompatibleArray() */
/************************************************************************/
/* Returns true if the objects are comparable, ie Point vs Point, LineString
vs LineString, but they might not be patchable or compatible */
static bool OGRGeoJSONComputePatchableOrCompatibleArrayInternal(
json_object *poJSonArray, json_object *poNativeArray, int nDepth,
bool &bOutPatchable, bool &bOutCompatible)
{
if (nDepth == 0)
{
bOutPatchable &=
OGRGeoJSONIsPatchablePosition(poJSonArray, poNativeArray);
bOutCompatible &=
OGRGeoJSONIsCompatiblePosition(poJSonArray, poNativeArray);
return json_object_get_type(poJSonArray) == json_type_array &&
json_object_get_type(poNativeArray) == json_type_array &&
json_object_get_type(json_object_array_get_idx(
poJSonArray, 0)) != json_type_array &&
json_object_get_type(json_object_array_get_idx(
poNativeArray, 0)) != json_type_array;
}
if (json_object_get_type(poJSonArray) == json_type_array &&
json_object_get_type(poNativeArray) == json_type_array)
{
const auto nLength = json_object_array_length(poJSonArray);
if (nLength == json_object_array_length(poNativeArray))
{
for (auto i = decltype(nLength){0}; i < nLength; i++)
{
json_object *poJSonChild =
json_object_array_get_idx(poJSonArray, i);
json_object *poNativeChild =
json_object_array_get_idx(poNativeArray, i);
if (!OGRGeoJSONComputePatchableOrCompatibleArrayInternal(
poJSonChild, poNativeChild, nDepth - 1, bOutPatchable,
bOutCompatible))
{
return false;
}
if (!bOutPatchable && !bOutCompatible)
break;
}
return true;
}
}
bOutPatchable = false;
bOutCompatible = false;
return false;
}
/* Returns true if the objects are comparable, ie Point vs Point, LineString
vs LineString, but they might not be patchable or compatible */
static bool OGRGeoJSONComputePatchableOrCompatibleArray(
json_object *poJSonArray, json_object *poNativeArray, int nDepth,
bool &bOutPatchable, bool &bOutCompatible)
{
bOutPatchable = true;
bOutCompatible = true;
return OGRGeoJSONComputePatchableOrCompatibleArrayInternal(
poJSonArray, poNativeArray, nDepth, bOutPatchable, bOutCompatible);
}
/************************************************************************/
/* OGRGeoJSONPatchArray() */
/************************************************************************/
static void OGRGeoJSONPatchArray(json_object *poJSonArray,
json_object *poNativeArray, int nDepth)
{
if (nDepth == 0)
{
OGRGeoJSONPatchPosition(poJSonArray, poNativeArray);
return;
}
const auto nLength = json_object_array_length(poJSonArray);
for (auto i = decltype(nLength){0}; i < nLength; i++)
{
json_object *poJSonChild = json_object_array_get_idx(poJSonArray, i);
json_object *poNativeChild =
json_object_array_get_idx(poNativeArray, i);
OGRGeoJSONPatchArray(poJSonChild, poNativeChild, nDepth - 1);
}
}
/************************************************************************/
/* OGRGeoJSONIsPatchableGeometry() */
/************************************************************************/
static bool OGRGeoJSONIsPatchableGeometry(json_object *poJSonGeometry,
json_object *poNativeGeometry,
bool &bOutPatchableCoords,
bool &bOutCompatibleCoords)
{
if (json_object_get_type(poJSonGeometry) != json_type_object ||
json_object_get_type(poNativeGeometry) != json_type_object)
{
return false;
}
json_object *poType = CPL_json_object_object_get(poJSonGeometry, "type");
json_object *poNativeType =
CPL_json_object_object_get(poNativeGeometry, "type");
if (poType == nullptr || poNativeType == nullptr ||
json_object_get_type(poType) != json_type_string ||
json_object_get_type(poNativeType) != json_type_string ||
strcmp(json_object_get_string(poType),
json_object_get_string(poNativeType)) != 0)
{
return false;
}
json_object_iter it;
it.key = nullptr;
it.val = nullptr;
it.entry = nullptr;
json_object_object_foreachC(poNativeGeometry, it)
{
if (strcmp(it.key, "coordinates") == 0)
{
json_object *poJSonCoordinates =
CPL_json_object_object_get(poJSonGeometry, "coordinates");
json_object *poNativeCoordinates = it.val;
// 0 = Point
// 1 = LineString or MultiPoint
// 2 = MultiLineString or Polygon
// 3 = MultiPolygon
for (int i = 0; i <= 3; i++)
{
if (OGRGeoJSONComputePatchableOrCompatibleArray(
poJSonCoordinates, poNativeCoordinates, i,
bOutPatchableCoords, bOutCompatibleCoords))
{
return bOutPatchableCoords || bOutCompatibleCoords;
}
}
return false;
}
if (strcmp(it.key, "geometries") == 0)
{
json_object *poJSonGeometries =
CPL_json_object_object_get(poJSonGeometry, "geometries");
json_object *poNativeGeometries = it.val;
if (json_object_get_type(poJSonGeometries) == json_type_array &&
json_object_get_type(poNativeGeometries) == json_type_array)
{
const auto nLength = json_object_array_length(poJSonGeometries);
if (nLength == json_object_array_length(poNativeGeometries))
{
for (auto i = decltype(nLength){0}; i < nLength; i++)
{
json_object *poJSonChild =
json_object_array_get_idx(poJSonGeometries, i);
json_object *poNativeChild =
json_object_array_get_idx(poNativeGeometries, i);
if (!OGRGeoJSONIsPatchableGeometry(
poJSonChild, poNativeChild, bOutPatchableCoords,
bOutCompatibleCoords))
{
return false;
}
}
return true;
}
}
return false;
}
}
return false;
}
/************************************************************************/
/* OGRGeoJSONPatchGeometry() */
/************************************************************************/
static void OGRGeoJSONPatchGeometry(json_object *poJSonGeometry,
json_object *poNativeGeometry,
bool bPatchableCoordinates,
const OGRGeoJSONWriteOptions &oOptions)
{
json_object_iter it;
it.key = nullptr;
it.val = nullptr;
it.entry = nullptr;
json_object_object_foreachC(poNativeGeometry, it)
{
if (strcmp(it.key, "type") == 0 || strcmp(it.key, "bbox") == 0)
{
continue;
}
if (strcmp(it.key, "coordinates") == 0)
{
if (!bPatchableCoordinates &&
!oOptions.bCanPatchCoordinatesWithNativeData)
{
continue;
}
json_object *poJSonCoordinates =
CPL_json_object_object_get(poJSonGeometry, "coordinates");
json_object *poNativeCoordinates = it.val;
for (int i = 0; i <= 3; i++)
{
if (OGRGeoJSONIsPatchableArray(poJSonCoordinates,
poNativeCoordinates, i))
{
OGRGeoJSONPatchArray(poJSonCoordinates, poNativeCoordinates,
i);
break;
}
}
continue;
}
if (strcmp(it.key, "geometries") == 0)
{
json_object *poJSonGeometries =
CPL_json_object_object_get(poJSonGeometry, "geometries");
json_object *poNativeGeometries = it.val;
const auto nLength = json_object_array_length(poJSonGeometries);
for (auto i = decltype(nLength){0}; i < nLength; i++)
{
json_object *poJSonChild =
json_object_array_get_idx(poJSonGeometries, i);
json_object *poNativeChild =
json_object_array_get_idx(poNativeGeometries, i);
OGRGeoJSONPatchGeometry(poJSonChild, poNativeChild,
bPatchableCoordinates, oOptions);
}
continue;
}
// See https://tools.ietf.org/html/rfc7946#section-7.1
if (oOptions.bHonourReservedRFC7946Members &&
(strcmp(it.key, "geometry") == 0 ||
strcmp(it.key, "properties") == 0 ||
strcmp(it.key, "features") == 0))
{
continue;
}
json_object_object_add(poJSonGeometry, it.key, json_object_get(it.val));
}
}
/************************************************************************/
/* OGRGeoJSONGetBBox */
/************************************************************************/
OGREnvelope3D OGRGeoJSONGetBBox(OGRGeometry *poGeometry,
const OGRGeoJSONWriteOptions &oOptions)
{
OGREnvelope3D sEnvelope;
poGeometry->getEnvelope(&sEnvelope);
if (oOptions.bBBOXRFC7946)
{
// Heuristics to determine if the geometry was split along the
// date line.
const double EPS = 1e-7;
const OGRwkbGeometryType eType =
wkbFlatten(poGeometry->getGeometryType());
if (OGR_GT_IsSubClassOf(eType, wkbGeometryCollection) &&
poGeometry->toGeometryCollection()->getNumGeometries() >= 2 &&
fabs(sEnvelope.MinX - (-180.0)) < EPS &&
fabs(sEnvelope.MaxX - 180.0) < EPS)
{
OGRGeometryCollection *poGC = poGeometry->toGeometryCollection();
double dfWestLimit = -180.0;
double dfEastLimit = 180.0;
bool bWestLimitIsInit = false;
bool bEastLimitIsInit = false;
for (auto &&poMember : poGC)
{
OGREnvelope sEnvelopePart;
if (poMember->IsEmpty())
continue;
poMember->getEnvelope(&sEnvelopePart);
const bool bTouchesMinus180 =
fabs(sEnvelopePart.MinX - (-180.0)) < EPS;
const bool bTouchesPlus180 =
fabs(sEnvelopePart.MaxX - 180.0) < EPS;
if (bTouchesMinus180 && !bTouchesPlus180)
{
if (sEnvelopePart.MaxX > dfEastLimit || !bEastLimitIsInit)
{
bEastLimitIsInit = true;
dfEastLimit = sEnvelopePart.MaxX;
}
}
else if (bTouchesPlus180 && !bTouchesMinus180)
{
if (sEnvelopePart.MinX < dfWestLimit || !bWestLimitIsInit)
{
bWestLimitIsInit = true;
dfWestLimit = sEnvelopePart.MinX;
}
}
else if (!bTouchesMinus180 && !bTouchesPlus180)
{
if (sEnvelopePart.MinX > 0 &&
(sEnvelopePart.MinX < dfWestLimit || !bWestLimitIsInit))
{
bWestLimitIsInit = true;
dfWestLimit = sEnvelopePart.MinX;
}
else if (sEnvelopePart.MaxX < 0 &&
(sEnvelopePart.MaxX > dfEastLimit ||
!bEastLimitIsInit))
{
bEastLimitIsInit = true;
dfEastLimit = sEnvelopePart.MaxX;
}
}
}
sEnvelope.MinX = dfWestLimit;
sEnvelope.MaxX = dfEastLimit;
}
}
return sEnvelope;
}
/************************************************************************/
/* OGRGeoJSONWriteFeature */
/************************************************************************/
json_object *OGRGeoJSONWriteFeature(OGRFeature *poFeature,
const OGRGeoJSONWriteOptions &oOptions)
{
CPLAssert(nullptr != poFeature);
bool bWriteBBOX = oOptions.bWriteBBOX;
json_object *poObj = json_object_new_object();
CPLAssert(nullptr != poObj);
json_object_object_add(poObj, "type", json_object_new_string("Feature"));
/* -------------------------------------------------------------------- */
/* Write native JSon data. */
/* -------------------------------------------------------------------- */
bool bIdAlreadyWritten = false;
const char *pszNativeMediaType = poFeature->GetNativeMediaType();
json_object *poNativeGeom = nullptr;
bool bHasProperties = true;
bool bWriteIdIfFoundInAttributes = true;
if (pszNativeMediaType &&
EQUAL(pszNativeMediaType, "application/vnd.geo+json"))
{
const char *pszNativeData = poFeature->GetNativeData();
json_object *poNativeJSon = nullptr;
if (pszNativeData && OGRJSonParse(pszNativeData, &poNativeJSon) &&
json_object_get_type(poNativeJSon) == json_type_object)
{
json_object_iter it;
it.key = nullptr;
it.val = nullptr;
it.entry = nullptr;
CPLString osNativeData;
bHasProperties = false;
json_object_object_foreachC(poNativeJSon, it)
{
if (strcmp(it.key, "type") == 0)
{
continue;
}
if (strcmp(it.key, "properties") == 0)
{
bHasProperties = true;
continue;
}
if (strcmp(it.key, "bbox") == 0)
{
bWriteBBOX = true;
continue;
}
if (strcmp(it.key, "geometry") == 0)
{
poNativeGeom = json_object_get(it.val);
continue;
}
if (strcmp(it.key, "id") == 0)
{
const auto eType = json_object_get_type(it.val);
// See https://tools.ietf.org/html/rfc7946#section-3.2
if (oOptions.bHonourReservedRFC7946Members &&
!oOptions.bForceIDFieldType &&
eType != json_type_string && eType != json_type_int &&
eType != json_type_double)
{
continue;
}
bIdAlreadyWritten = true;
if (it.val && oOptions.bForceIDFieldType &&
oOptions.eForcedIDFieldType == OFTInteger64)
{
if (eType != json_type_int)
{
json_object_object_add(
poObj, it.key,
json_object_new_int64(CPLAtoGIntBig(
json_object_get_string(it.val))));
bWriteIdIfFoundInAttributes = false;
continue;
}
}
else if (it.val && oOptions.bForceIDFieldType &&
oOptions.eForcedIDFieldType == OFTString)
{
if (eType != json_type_string)
{
json_object_object_add(
poObj, it.key,
json_object_new_string(
json_object_get_string(it.val)));
bWriteIdIfFoundInAttributes = false;
continue;
}
}
if (it.val != nullptr)
{
int nIdx =
poFeature->GetDefnRef()->GetFieldIndexCaseSensitive(
"id");
if (eType == json_type_string && nIdx >= 0 &&
poFeature->GetFieldDefnRef(nIdx)->GetType() ==
OFTString &&
strcmp(json_object_get_string(it.val),
poFeature->GetFieldAsString(nIdx)) == 0)
{
bWriteIdIfFoundInAttributes = false;
}
else if (eType == json_type_int && nIdx >= 0 &&
(poFeature->GetFieldDefnRef(nIdx)->GetType() ==
OFTInteger ||
poFeature->GetFieldDefnRef(nIdx)->GetType() ==
OFTInteger64) &&
json_object_get_int64(it.val) ==
poFeature->GetFieldAsInteger64(nIdx))
{
bWriteIdIfFoundInAttributes = false;
}
}
}
// See https://tools.ietf.org/html/rfc7946#section-7.1
if (oOptions.bHonourReservedRFC7946Members &&
(strcmp(it.key, "coordinates") == 0 ||
strcmp(it.key, "geometries") == 0 ||
strcmp(it.key, "features") == 0))
{
continue;
}
json_object_object_add(poObj, it.key, json_object_get(it.val));
}
json_object_put(poNativeJSon);
}
}
/* -------------------------------------------------------------------- */
/* Write FID if available */
/* -------------------------------------------------------------------- */
if (!oOptions.osIDField.empty())
{
int nIdx = poFeature->GetDefnRef()->GetFieldIndexCaseSensitive(
oOptions.osIDField);
if (nIdx >= 0)
{
if ((oOptions.bForceIDFieldType &&
oOptions.eForcedIDFieldType == OFTInteger64) ||
(!oOptions.bForceIDFieldType &&
(poFeature->GetFieldDefnRef(nIdx)->GetType() == OFTInteger ||
poFeature->GetFieldDefnRef(nIdx)->GetType() == OFTInteger64)))
{
json_object_object_add(
poObj, "id",
json_object_new_int64(
poFeature->GetFieldAsInteger64(nIdx)));
}
else
{
json_object_object_add(
poObj, "id",
json_object_new_string(poFeature->GetFieldAsString(nIdx)));
}
}
}
else if (poFeature->GetFID() != OGRNullFID && !bIdAlreadyWritten)
{
if (oOptions.bForceIDFieldType &&
oOptions.eForcedIDFieldType == OFTString)
{
json_object_object_add(poObj, "id",
json_object_new_string(CPLSPrintf(
CPL_FRMT_GIB, poFeature->GetFID())));
}
else
{
json_object_object_add(poObj, "id",
json_object_new_int64(poFeature->GetFID()));
}
}
/* -------------------------------------------------------------------- */
/* Write feature attributes to GeoJSON "properties" object. */
/* -------------------------------------------------------------------- */
if (bHasProperties)
{
json_object *poObjProps = OGRGeoJSONWriteAttributes(
poFeature, bWriteIdIfFoundInAttributes, oOptions);
json_object_object_add(poObj, "properties", poObjProps);
}
/* -------------------------------------------------------------------- */
/* Write feature geometry to GeoJSON "geometry" object. */
/* Null geometries are allowed, according to the GeoJSON Spec. */
/* -------------------------------------------------------------------- */
json_object *poObjGeom = nullptr;
OGRGeometry *poGeometry = poFeature->GetGeometryRef();
if (nullptr != poGeometry)
{
poObjGeom = OGRGeoJSONWriteGeometry(poGeometry, oOptions);
if (bWriteBBOX && !poGeometry->IsEmpty())
{
OGREnvelope3D sEnvelope = OGRGeoJSONGetBBox(poGeometry, oOptions);
json_object *poObjBBOX = json_object_new_array();
json_object_array_add(
poObjBBOX, json_object_new_coord(sEnvelope.MinX, oOptions));
json_object_array_add(
poObjBBOX, json_object_new_coord(sEnvelope.MinY, oOptions));
if (wkbHasZ(poGeometry->getGeometryType()))
json_object_array_add(
poObjBBOX, json_object_new_coord(sEnvelope.MinZ, oOptions));
json_object_array_add(
poObjBBOX, json_object_new_coord(sEnvelope.MaxX, oOptions));
json_object_array_add(
poObjBBOX, json_object_new_coord(sEnvelope.MaxY, oOptions));
if (wkbHasZ(poGeometry->getGeometryType()))
json_object_array_add(
poObjBBOX, json_object_new_coord(sEnvelope.MaxZ, oOptions));
json_object_object_add(poObj, "bbox", poObjBBOX);
}
bool bOutPatchableCoords = false;
bool bOutCompatibleCoords = false;
if (OGRGeoJSONIsPatchableGeometry(poObjGeom, poNativeGeom,
bOutPatchableCoords,
bOutCompatibleCoords))
{
OGRGeoJSONPatchGeometry(poObjGeom, poNativeGeom,
bOutPatchableCoords, oOptions);
}
}
json_object_object_add(poObj, "geometry", poObjGeom);
if (poNativeGeom != nullptr)
json_object_put(poNativeGeom);
return poObj;
}
/************************************************************************/
/* OGRGeoJSONWriteAttributes */
/************************************************************************/
json_object *OGRGeoJSONWriteAttributes(OGRFeature *poFeature,
bool bWriteIdIfFoundInAttributes,
const OGRGeoJSONWriteOptions &oOptions)
{
CPLAssert(nullptr != poFeature);
json_object *poObjProps = json_object_new_object();
CPLAssert(nullptr != poObjProps);
OGRFeatureDefn *poDefn = poFeature->GetDefnRef();
const int nIDField =
!oOptions.osIDField.empty()
? poDefn->GetFieldIndexCaseSensitive(oOptions.osIDField)
: -1;
constexpr int MAX_SIGNIFICANT_DIGITS_FLOAT32 = 8;
const int nFloat32SignificantDigits =
oOptions.nSignificantFigures >= 0
? std::min(oOptions.nSignificantFigures,
MAX_SIGNIFICANT_DIGITS_FLOAT32)
: MAX_SIGNIFICANT_DIGITS_FLOAT32;
const int nFieldCount = poDefn->GetFieldCount();
json_object *poNativeObjProp = nullptr;
json_object *poProperties = nullptr;
// Scan the fields to determine if there is a chance of
// mixed types and we can use native media
bool bUseNativeMedia{false};
if (poFeature->GetNativeMediaType() &&
strcmp(poFeature->GetNativeMediaType(), "application/vnd.geo+json") ==
0 &&
poFeature->GetNativeData())
{
for (int nField = 0; nField < nFieldCount; ++nField)
{
if (poDefn->GetFieldDefn(nField)->GetSubType() == OFSTJSON)
{
if (OGRJSonParse(poFeature->GetNativeData(), &poNativeObjProp,
false))
{
poProperties = OGRGeoJSONFindMemberByName(poNativeObjProp,
"properties");
bUseNativeMedia = poProperties != nullptr;
}
break;
}
}
}
for (int nField = 0; nField < nFieldCount; ++nField)
{
if (!poFeature->IsFieldSet(nField) || nField == nIDField)
{
continue;
}
OGRFieldDefn *poFieldDefn = poDefn->GetFieldDefn(nField);
CPLAssert(nullptr != poFieldDefn);
const OGRFieldType eType = poFieldDefn->GetType();
const OGRFieldSubType eSubType = poFieldDefn->GetSubType();
if (!bWriteIdIfFoundInAttributes &&
strcmp(poFieldDefn->GetNameRef(), "id") == 0)
{
continue;
}
json_object *poObjProp = nullptr;
if (poFeature->IsFieldNull(nField))
{
// poObjProp = NULL;
}
else if (OFTInteger == eType)
{
if (eSubType == OFSTBoolean)
poObjProp = json_object_new_boolean(
poFeature->GetFieldAsInteger(nField));
else
poObjProp =
json_object_new_int(poFeature->GetFieldAsInteger(nField));
}
else if (OFTInteger64 == eType)
{
if (eSubType == OFSTBoolean)
poObjProp = json_object_new_boolean(
(json_bool)poFeature->GetFieldAsInteger64(nField));
else
poObjProp = json_object_new_int64(
poFeature->GetFieldAsInteger64(nField));
}
else if (OFTReal == eType)
{
const double val = poFeature->GetFieldAsDouble(nField);
if (!CPLIsFinite(val))
{
if (!oOptions.bAllowNonFiniteValues)
{
static bool bHasWarned = false;
if (!bHasWarned)
{
bHasWarned = true;
CPLError(CE_Warning, CPLE_AppDefined,
"NaN of Infinity value found. Skipped");
}
continue;
}
}
if (eSubType == OFSTFloat32)
{
poObjProp = json_object_new_float_with_significant_figures(
static_cast<float>(val), nFloat32SignificantDigits);
}
else
{
poObjProp = json_object_new_double_with_significant_figures(
val, oOptions.nSignificantFigures);
}
}
else if (OFTString == eType)
{
const char *pszStr = poFeature->GetFieldAsString(nField);
const size_t nLen = strlen(pszStr);
if (eSubType == OFSTJSON ||
((pszStr[0] == '{' && pszStr[nLen - 1] == '}') ||
(pszStr[0] == '[' && pszStr[nLen - 1] == ']')))
{
if (bUseNativeMedia)
{
if (json_object *poProperty = OGRGeoJSONFindMemberByName(
poProperties, poFieldDefn->GetNameRef()))
{
const char *pszProp{json_object_get_string(poProperty)};
if (pszProp && strcmp(pszProp, pszStr) == 0)
{
poObjProp = json_object_get(poProperty);
}
}
}
if (poObjProp == nullptr)
{
if ((pszStr[0] == '{' && pszStr[nLen - 1] == '}') ||
(pszStr[0] == '[' && pszStr[nLen - 1] == ']'))
{
OGRJSonParse(pszStr, &poObjProp, false);
}
}
}
if (poObjProp == nullptr)
poObjProp = json_object_new_string(pszStr);
}
else if (OFTIntegerList == eType)
{
int nSize = 0;
const int *panList =
poFeature->GetFieldAsIntegerList(nField, &nSize);
poObjProp = json_object_new_array();
for (int i = 0; i < nSize; i++)
{
if (eSubType == OFSTBoolean)
json_object_array_add(poObjProp,
json_object_new_boolean(panList[i]));
else
json_object_array_add(poObjProp,
json_object_new_int(panList[i]));
}
}
else if (OFTInteger64List == eType)
{
int nSize = 0;
const GIntBig *panList =
poFeature->GetFieldAsInteger64List(nField, &nSize);
poObjProp = json_object_new_array();
for (int i = 0; i < nSize; i++)
{
if (eSubType == OFSTBoolean)
json_object_array_add(
poObjProp, json_object_new_boolean(
static_cast<json_bool>(panList[i])));
else
json_object_array_add(poObjProp,
json_object_new_int64(panList[i]));
}
}
else if (OFTRealList == eType)
{
int nSize = 0;
const double *padfList =
poFeature->GetFieldAsDoubleList(nField, &nSize);
poObjProp = json_object_new_array();
for (int i = 0; i < nSize; i++)
{
if (eSubType == OFSTFloat32)
{
json_object_array_add(
poObjProp,
json_object_new_float_with_significant_figures(
static_cast<float>(padfList[i]),
nFloat32SignificantDigits));
}
else
{
json_object_array_add(
poObjProp,
json_object_new_double_with_significant_figures(
padfList[i], oOptions.nSignificantFigures));
}
}
}
else if (OFTStringList == eType)
{
char **papszStringList = poFeature->GetFieldAsStringList(nField);
poObjProp = json_object_new_array();
for (int i = 0; papszStringList && papszStringList[i]; i++)
{
json_object_array_add(
poObjProp, json_object_new_string(papszStringList[i]));
}
}
else if (OFTDateTime == eType || OFTDate == eType)