void OGRGeoJSONDataSource::LoadLayers()
{
if( NULL == pszGeoData_ )
{
CPLError( CE_Failure, CPLE_ObjectNull,
"GeoJSON data buffer empty" );
return;
}
const char* const apszPrefix[] = { "loadGeoJSON(", "jsonp(" };
for(size_t iP = 0; iP < sizeof(apszPrefix) / sizeof(apszPrefix[0]); iP++ )
{
if( strncmp(pszGeoData_, apszPrefix[iP], strlen(apszPrefix[iP])) == 0 )
{
size_t nDataLen = strlen(pszGeoData_);
memmove( pszGeoData_, pszGeoData_ + strlen(apszPrefix[iP]),
nDataLen - strlen(apszPrefix[iP]) );
size_t i = nDataLen - strlen(apszPrefix[iP]);
pszGeoData_[i] = '\0';
while( i > 0 && pszGeoData_[i] != ')' )
{
i --;
}
pszGeoData_[i] = '\0';
}
}
if ( !GeoJSONIsObject( pszGeoData_) )
{
CPLDebug( "GeoJSON", "No valid GeoJSON data found in source '%s'", pszName_ );
return;
}
OGRErr err = OGRERR_NONE;
/* -------------------------------------------------------------------- */
/* Is it ESRI Feature Service data ? */
/* -------------------------------------------------------------------- */
if ( strstr(pszGeoData_, "esriGeometry") ||
strstr(pszGeoData_, "esriFieldType") )
{
OGRESRIJSONReader reader;
err = reader.Parse( pszGeoData_ );
if( OGRERR_NONE == err )
{
reader.ReadLayers( this );
}
return;
}
/* -------------------------------------------------------------------- */
/* Is it TopoJSON data ? */
/* -------------------------------------------------------------------- */
if ( strstr(pszGeoData_, "\"type\"") &&
strstr(pszGeoData_, "\"Topology\"") )
{
OGRTopoJSONReader reader;
err = reader.Parse( pszGeoData_ );
if( OGRERR_NONE == err )
{
reader.ReadLayers( this );
}
return;
}
/* -------------------------------------------------------------------- */
/* Configure GeoJSON format translator. */
/* -------------------------------------------------------------------- */
OGRGeoJSONReader reader;
if( eGeometryAsCollection == flTransGeom_ )
{
reader.SetPreserveGeometryType( false );
CPLDebug( "GeoJSON", "Geometry as OGRGeometryCollection type." );
}
if( eAtributesSkip == flTransAttrs_ )
{
reader.SetSkipAttributes( true );
CPLDebug( "GeoJSON", "Skip all attributes." );
}
/* -------------------------------------------------------------------- */
/* Parse GeoJSON and build valid OGRLayer instance. */
/* -------------------------------------------------------------------- */
err = reader.Parse( pszGeoData_ );
if( OGRERR_NONE == err )
{
reader.ReadLayers( this );
}
return;
}
void OGRGeoJSONDataSource::LoadLayers(char** papszOpenOptions)
{
if( NULL == pszGeoData_ )
{
CPLError( CE_Failure, CPLE_ObjectNull,
"GeoJSON data buffer empty" );
return;
}
const char* const apszPrefix[] = { "loadGeoJSON(", "jsonp(" };
for(size_t iP = 0; iP < sizeof(apszPrefix) / sizeof(apszPrefix[0]); iP++ )
{
if( strncmp(pszGeoData_, apszPrefix[iP], strlen(apszPrefix[iP])) == 0 )
{
size_t nDataLen = strlen(pszGeoData_);
memmove( pszGeoData_, pszGeoData_ + strlen(apszPrefix[iP]),
nDataLen - strlen(apszPrefix[iP]) );
size_t i = nDataLen - strlen(apszPrefix[iP]);
pszGeoData_[i] = '\0';
while( i > 0 && pszGeoData_[i] != ')' )
{
i --;
}
pszGeoData_[i] = '\0';
}
}
if ( !GeoJSONIsObject( pszGeoData_) )
{
CPLDebug( "GeoJSON", "No valid GeoJSON data found in source '%s'", pszName_ );
return;
}
OGRErr err = OGRERR_NONE;
/* -------------------------------------------------------------------- */
/* Is it ESRI Feature Service data ? */
/* -------------------------------------------------------------------- */
if ( strstr(pszGeoData_, "esriGeometry") ||
strstr(pszGeoData_, "esriFieldType") )
{
OGRESRIJSONReader reader;
err = reader.Parse( pszGeoData_ );
if( OGRERR_NONE == err )
{
json_object* poObj = reader.GetJSonObject();
if( poObj && json_object_get_type(poObj) == json_type_object )
{
json_object* poExceededTransferLimit =
json_object_object_get(poObj, "exceededTransferLimit");
if( poExceededTransferLimit && json_object_get_type(poExceededTransferLimit) == json_type_boolean )
bOtherPages_ = json_object_get_boolean(poExceededTransferLimit);
}
reader.ReadLayers( this );
}
return;
}
/* -------------------------------------------------------------------- */
/* Is it TopoJSON data ? */
/* -------------------------------------------------------------------- */
if ( strstr(pszGeoData_, "\"type\"") &&
strstr(pszGeoData_, "\"Topology\"") )
{
OGRTopoJSONReader reader;
err = reader.Parse( pszGeoData_ );
if( OGRERR_NONE == err )
{
reader.ReadLayers( this );
}
return;
}
/* -------------------------------------------------------------------- */
/* Configure GeoJSON format translator. */
/* -------------------------------------------------------------------- */
OGRGeoJSONReader reader;
if( eGeometryAsCollection == flTransGeom_ )
{
reader.SetPreserveGeometryType( false );
CPLDebug( "GeoJSON", "Geometry as OGRGeometryCollection type." );
}
if( eAtributesSkip == flTransAttrs_ )
{
reader.SetSkipAttributes( true );
CPLDebug( "GeoJSON", "Skip all attributes." );
}
reader.SetFlattenNestedAttributes(
(bool)CSLFetchBoolean(papszOpenOptions, "FLATTEN_NESTED_ATTRIBUTES", FALSE),
CSLFetchNameValueDef(papszOpenOptions, "NESTED_ATTRIBUTE_SEPARATOR", "_")[0]);
/* -------------------------------------------------------------------- */
/* Parse GeoJSON and build valid OGRLayer instance. */
/* -------------------------------------------------------------------- */
err = reader.Parse( pszGeoData_ );
if( OGRERR_NONE == err )
{
json_object* poObj = reader.GetJSonObject();
if( poObj && json_object_get_type(poObj) == json_type_object )
{
json_object* poProperties = json_object_object_get(poObj, "properties");
if( poProperties && json_object_get_type(poProperties) == json_type_object )
{
json_object* poExceededTransferLimit =
json_object_object_get(poProperties, "exceededTransferLimit");
if( poExceededTransferLimit && json_object_get_type(poExceededTransferLimit) == json_type_boolean )
bOtherPages_ = json_object_get_boolean(poExceededTransferLimit);
}
}
reader.ReadLayers( this );
}
return;
}
OGRGeoJSONLayer* OGRGeoJSONDataSource::LoadLayer()
{
if( NULL == pszGeoData_ )
{
CPLError( CE_Failure, CPLE_ObjectNull,
"GeoJSON data buffer empty" );
return NULL;
}
if ( !GeoJSONIsObject( pszGeoData_) )
{
CPLDebug( "GeoJSON", "No valid GeoJSON data found in source '%s'", pszName_ );
return NULL;
}
OGRErr err = OGRERR_NONE;
OGRGeoJSONLayer* poLayer = NULL;
/* -------------------------------------------------------------------- */
/* Is it ESRI Feature Service data ? */
/* -------------------------------------------------------------------- */
if ( strstr(pszGeoData_, "esriGeometry") ||
strstr(pszGeoData_, "esriFieldTypeOID") )
{
OGRESRIJSONReader reader;
err = reader.Parse( pszGeoData_ );
if( OGRERR_NONE == err )
{
// TODO: Think about better name selection
poLayer = reader.ReadLayer( OGRGeoJSONLayer::DefaultName, this );
}
return poLayer;
}
/* -------------------------------------------------------------------- */
/* Configure GeoJSON format translator. */
/* -------------------------------------------------------------------- */
OGRGeoJSONReader reader;
if( eGeometryAsCollection == flTransGeom_ )
{
reader.SetPreserveGeometryType( false );
CPLDebug( "GeoJSON", "Geometry as OGRGeometryCollection type." );
}
if( eAtributesSkip == flTransAttrs_ )
{
reader.SetSkipAttributes( true );
CPLDebug( "GeoJSON", "Skip all attributes." );
}
/* -------------------------------------------------------------------- */
/* Parse GeoJSON and build valid OGRLayer instance. */
/* -------------------------------------------------------------------- */
err = reader.Parse( pszGeoData_ );
if( OGRERR_NONE == err )
{
// TODO: Think about better name selection
poLayer = reader.ReadLayer( OGRGeoJSONLayer::DefaultName, this );
}
return poLayer;
}
