C++ OGRFieldDefn::GetNameRef方法代码示例

QDebug operator<<(QDebug dbg, OGRLayer* layer)
{
    layer->ResetReading();
    OGRFeatureDefn* def = layer->GetLayerDefn();
    FeaturePtr feat;
    while ((feat = FeaturePtr(layer->GetNextFeature())) != nullptr)
    {
        for (int i = 0; i < def->GetFieldCount(); ++i)
        {
            OGRFieldDefn* fdef = def->GetFieldDefn(i);
            switch (fdef->GetType())
            {
            case OFTInteger:
                dbg << fdef->GetNameRef() << feat->GetFieldAsInteger(i);
                break;
            case OFTReal:
                dbg << fdef->GetNameRef() << feat->GetFieldAsDouble(i);
                break;
            case OFTString:
                dbg << fdef->GetNameRef() << feat->GetFieldAsString(i);
                break;
            default:
                dbg << "Unknown type:" << fdef->GetType();
            }
        }
        dbg << "-----";
    }

    return dbg;
}

OGRErr OGRILI2Layer::ICreateFeature( OGRFeature *poFeature ) {
    char szTempBuffer[80];
    const char* tid;
    int iField = 0;
    if( poFeatureDefn->GetFieldCount() &&
        EQUAL(poFeatureDefn->GetFieldDefn(iField)->GetNameRef(), "TID") )
    {
        tid = poFeature->GetFieldAsString(0);
        ++iField;
    }
    else
    {
        snprintf( szTempBuffer, sizeof(szTempBuffer), CPL_FRMT_GIB,
                  poFeature->GetFID() );
        tid = szTempBuffer;
    }

    VSILFILE* fp = poDS->GetOutputFP();
    if (fp == NULL)
        return OGRERR_FAILURE;

    VSIFPrintfL(fp, "<%s TID=\"%s\">\n", poFeatureDefn->GetName(), tid);

    // Write out Geometries
    for( int iGeomField = 0;
         iGeomField < poFeatureDefn->GetGeomFieldCount();
         iGeomField++ )
    {
        OGRGeomFieldDefn *poFieldDefn
            = poFeatureDefn->GetGeomFieldDefn(iGeomField);
        OGRGeometry* poGeom = poFeature->GetGeomFieldRef(iGeomField);
        if( poGeom != NULL )
        {
            CPLString iliGeomType = GetIliGeomType(poFieldDefn->GetNameRef());
            OGR2ILIGeometryAppend( poGeom, fp, poFieldDefn->GetNameRef(),
                                   iliGeomType );
        }
    }

    // Write all "set" fields.
    for( ; iField < poFeatureDefn->GetFieldCount(); iField++ )
    {

        OGRFieldDefn *poField = poFeatureDefn->GetFieldDefn( iField );

        if( poFeature->IsFieldSet( iField ) )
        {
            const char *pszRaw = poFeature->GetFieldAsString( iField );
            VSIFPrintfL(fp, "<%s>%s</%s>\n", poField->GetNameRef(), pszRaw, poField->GetNameRef());
        }
    }

    VSIFPrintfL(fp, "</%s>\n", poFeatureDefn->GetName());

    return OGRERR_NONE;
}

//#include "s57.h"
int main(int argc, char **argv)

{
    OGRRegisterAll();

    OGRDataSource       *poDS;
    printf("Opening %s\n",argv[1]);
    poDS = OGRSFDriverRegistrar::Open( argv[1], FALSE );
    if( poDS == NULL )
    {
        printf( "Open failed.\n" );
        exit( 1 );
    }

    OGRLayer  *poLayer;
    int layers = poDS->GetLayerCount();
    for (int layer =0 ; layer< layers; layer++) {
        poLayer = poDS->GetLayer(layer);
        if (poLayer == NULL) continue;
        printf("%d, %s, %s",layer, poLayer->GetName(), OGRGeometryTypeToName(poLayer->GetGeomType()));
        poLayer->ResetReading();
        OGRFeatureDefn *poFDefn = poLayer->GetLayerDefn();  
        int iField;
        for( iField = 0; iField < poFDefn->GetFieldCount(); iField++ )
        {
            OGRFieldDefn *poFieldDefn = poFDefn->GetFieldDefn( iField );
            printf(", %s",poFieldDefn->GetNameRef());
        }
        printf("\n");
    }

}

//---------------------------------------------------------
CSG_Shapes * COGR_DataSource::Read_Shapes(int iLayer)
{
	OGRLayer	*pLayer	= Get_Layer(iLayer);

	//-----------------------------------------------------
	if( pLayer && Get_Type(iLayer) != SHAPE_TYPE_Undefined )
	{
		int				iField;
		OGRFeature		*pFeature;
		OGRFeatureDefn	*pDef		= pLayer->GetLayerDefn();
		CSG_Shapes		*pShapes	= SG_Create_Shapes(Get_Type(iLayer), CSG_String(pDef->GetName()));

		for(iField=0; iField<pDef->GetFieldCount(); iField++)
		{
			OGRFieldDefn	*pDefField	= pDef->GetFieldDefn(iField);

			pShapes->Add_Field(pDefField->GetNameRef(), COGR_Driver::Get_Type(pDefField->GetType()));
		}

		pLayer->ResetReading();

		//-------------------------------------------------
		while( (pFeature = pLayer->GetNextFeature()) != NULL && SG_UI_Process_Get_Okay(false) )
		{
			OGRGeometry	*pGeometry	= pFeature->GetGeometryRef();

			if( pGeometry != NULL )
			{
				CSG_Shape	*pShape	= pShapes->Add_Shape();

				for(iField=0; iField<pDef->GetFieldCount(); iField++)
				{
					OGRFieldDefn	*pDefField	= pDef->GetFieldDefn(iField);

					switch( pDefField->GetType() )
					{
					default:			pShape->Set_Value(iField, SG_STR_MBTOSG(pFeature->GetFieldAsString (iField)));	break;
					case OFTString:		pShape->Set_Value(iField, SG_STR_MBTOSG(pFeature->GetFieldAsString (iField)));	break;
					case OFTInteger:	pShape->Set_Value(iField, pFeature->GetFieldAsInteger(iField));	break;
					case OFTReal:		pShape->Set_Value(iField, pFeature->GetFieldAsDouble (iField));	break;
					}
				}

				//-----------------------------------------
				if( _Read_Geometry(pShape, pGeometry) == false )
				{
					pShapes->Del_Shape(pShape);
				}
			}

			OGRFeature::DestroyFeature(pFeature);
		}

		return( pShapes );
	}

	//-----------------------------------------------------
	return( NULL );
}

wxString wxGISTable::GetColLabelValue(int col)
{
    wxString label;
    OGRFieldDefn* pOGRFieldDefn = m_pOGRFeatureDefn->GetFieldDefn(col);
    label = wgMB2WX(pOGRFieldDefn->GetNameRef());
    if(!m_sFIDKeyName.IsEmpty())
    {
        if(label == m_sFIDKeyName);
        label += _(" [*]");
    }
    return label;
}

json_object* OGRGMEAttributesToGeoJSON( OGRFeature* poFeature )
{
    if ( NULL == poFeature )
        return NULL;
    json_object* pjoProperties = json_object_new_object();
    CPLAssert( NULL != pjoProperties );

    OGRFeatureDefn* poDefn = poFeature->GetDefnRef();
    for( int nField = 0; nField < poDefn->GetFieldCount(); ++nField ) {
        json_object* pjoProperty = NULL;
        OGRFieldDefn* poFieldDefn = poDefn->GetFieldDefn( nField );
        if ( NULL == poFieldDefn )
            continue;
        OGRFieldType eType = poFieldDefn->GetType();

        if( !poFeature->IsFieldSet(nField) )
            pjoProperty = NULL;

        // In GME integers are encoded as strings.
        else if( OFTInteger == eType )
            pjoProperty = json_object_new_string( poFeature->GetFieldAsString( nField ) );

        else if( OFTReal == eType )
            pjoProperty = json_object_new_gme_double( poFeature->GetFieldAsDouble(nField) );

        // Supported types are integer, double and string. So treating everything else as strings
        else
            pjoProperty = json_object_new_string( poFeature->GetFieldAsString(nField) );

        json_object_object_add( pjoProperties, poFieldDefn->GetNameRef(), pjoProperty );
    }
    int nGxId = poFeature->GetFieldIndex("gx_id");
    if (nGxId < 0) {
        json_object* pjoProperty = NULL;
        GIntBig nFID = poFeature->GetFID();

        char acGxId[128];
        snprintf(acGxId, 128, "GDAL-" CPL_FRMT_GIB, nFID);
        CPLDebug("GME", "gx_id is not set, so adding \"gx_id\": \"%s\" field.",
                 acGxId);

        pjoProperty = json_object_new_string( acGxId );
        json_object_object_add( pjoProperties, "gx_id", pjoProperty);
    }

    return pjoProperties;
}

wxString wxGISGridTable::GetColLabelValue(int col)
{
    wxString label;
    OGRFeatureDefn* pOGRFeatureDefn = m_pGISDataset->GetDefinition();
    if(!pOGRFeatureDefn)
        return wxEmptyString;

	OGRFieldDefn* pOGRFieldDefn = pOGRFeatureDefn->GetFieldDefn(col);
	if(pOGRFieldDefn)
		label = wxString(pOGRFieldDefn->GetNameRef(), wxConvUTF8);

    if(label.IsSameAs(m_pGISDataset->GetFIDColumn(), false))
    {
        label.Append(_(" [*]"));
	}
    return label;
}

OGRErr      OGRLayerWithTransaction::AlterFieldDefn( int iField,
        OGRFieldDefn* poNewFieldDefn,
        int nFlags )
{
    if( !m_poDecoratedLayer ) return OGRERR_FAILURE;
    OGRErr eErr = m_poDecoratedLayer->AlterFieldDefn(iField, poNewFieldDefn, nFlags);
    if( m_poFeatureDefn && eErr == OGRERR_NONE )
    {
        OGRFieldDefn* poSrcFieldDefn = m_poDecoratedLayer->GetLayerDefn()->GetFieldDefn(iField);
        OGRFieldDefn* poDstFieldDefn = m_poFeatureDefn->GetFieldDefn(iField);
        poDstFieldDefn->SetName(poSrcFieldDefn->GetNameRef());
        poDstFieldDefn->SetType(poSrcFieldDefn->GetType());
        poDstFieldDefn->SetSubType(poSrcFieldDefn->GetSubType());
        poDstFieldDefn->SetWidth(poSrcFieldDefn->GetWidth());
        poDstFieldDefn->SetPrecision(poSrcFieldDefn->GetPrecision());
        poDstFieldDefn->SetDefault(poSrcFieldDefn->GetDefault());
        poDstFieldDefn->SetNullable(poSrcFieldDefn->IsNullable());
    }
    return eErr;
}

OGRErr OGRGeoJSONWriteLayer::CreateField(OGRFieldDefn* poField, int bApproxOK)
{
    UNREFERENCED_PARAM(bApproxOK);

    for( int i = 0; i < poFeatureDefn_->GetFieldCount(); ++i )
    {
        OGRFieldDefn* poDefn = poFeatureDefn_->GetFieldDefn(i);
        CPLAssert( NULL != poDefn );

        if( EQUAL( poDefn->GetNameRef(), poField->GetNameRef() ) )
        {
            CPLDebug( "GeoJSON", "Field '%s' already present in schema",
                      poField->GetNameRef() );
            
            // TODO - mloskot: Is this return code correct?
            return OGRERR_NONE;
        }
    }

    poFeatureDefn_->AddFieldDefn( poField );

    return OGRERR_NONE;
}

feature_ptr ogr_featureset::next()
{
    OGRFeature *poFeature;
    while ((poFeature = layer_.GetNextFeature()) != NULL)
    {
        // ogr feature ids start at 0, so add one to stay
        // consistent with other mapnik datasources that start at 1
        const int feature_id = (poFeature->GetFID() + 1);
        feature_ptr feature(feature_factory::create(ctx_,feature_id));

        OGRGeometry* geom = poFeature->GetGeometryRef();
        if (geom && ! geom->IsEmpty())
        {
            ogr_converter::convert_geometry(geom, feature);
        }
        else
        {
            MAPNIK_LOG_DEBUG(ogr) << "ogr_featureset: Feature with null geometry="
                << poFeature->GetFID();
            OGRFeature::DestroyFeature( poFeature );
            continue;
        }

        ++count_;

        int fld_count = layerdef_->GetFieldCount();
        for (int i = 0; i < fld_count; i++)
        {
            OGRFieldDefn* fld = layerdef_->GetFieldDefn(i);
            const OGRFieldType type_oid = fld->GetType();
            const std::string fld_name = fld->GetNameRef();

            switch (type_oid)
            {
            case OFTInteger:
            {
                feature->put( fld_name, poFeature->GetFieldAsInteger(i));
                break;
            }

            case OFTReal:
            {
                feature->put( fld_name, poFeature->GetFieldAsDouble(i));
                break;
            }

            case OFTString:
            case OFTWideString:     // deprecated !
            {
                UnicodeString ustr = tr_->transcode(poFeature->GetFieldAsString(i));
                feature->put( fld_name, ustr);
                break;
            }

            case OFTIntegerList:
            case OFTRealList:
            case OFTStringList:
            case OFTWideStringList: // deprecated !
            {
                MAPNIK_LOG_WARN(ogr) << "ogr_featureset: Unhandled type_oid=" << type_oid;
                break;
            }

            case OFTBinary:
            {
                MAPNIK_LOG_WARN(ogr) << "ogr_featureset: Unhandled type_oid=" << type_oid;
                //feature->put(name,feat->GetFieldAsBinary (i, size));
                break;
            }

            case OFTDate:
            case OFTTime:
            case OFTDateTime:       // unhandled !
            {
                MAPNIK_LOG_WARN(ogr) << "ogr_featureset: Unhandled type_oid=" << type_oid;
                break;
            }

            default: // unknown
            {
                MAPNIK_LOG_WARN(ogr) << "ogr_featureset: Unknown type_oid=" << type_oid;
                break;
            }
            }
        }
        OGRFeature::DestroyFeature( poFeature );
        return feature;
    }

    MAPNIK_LOG_DEBUG(ogr) << "ogr_featureset: " << count_ << " features";

    return feature_ptr();
}

static void ReportOnLayer( OGRLayer * poLayer, const char *pszWHERE, 
                           OGRGeometry *poSpatialFilter )

{
    OGRFeatureDefn      *poDefn = poLayer->GetLayerDefn();

/* -------------------------------------------------------------------- */
/*      Set filters if provided.                                        */
/* -------------------------------------------------------------------- */
    if( pszWHERE != NULL )
        poLayer->SetAttributeFilter( pszWHERE );

    if( poSpatialFilter != NULL )
        poLayer->SetSpatialFilter( poSpatialFilter );

/* -------------------------------------------------------------------- */
/*      Report various overall information.                             */
/* -------------------------------------------------------------------- */
    printf( "\n" );
    
    printf( "Layer name: %s\n", poDefn->GetName() );

    if( bVerbose )
    {
        printf( "Geometry: %s\n", 
                OGRGeometryTypeToName( poDefn->GetGeomType() ) );
        
        printf( "Feature Count: %d\n", poLayer->GetFeatureCount() );
        
        OGREnvelope oExt;
        if (poLayer->GetExtent(&oExt, TRUE) == OGRERR_NONE)
        {
            printf("Extent: (%f, %f) - (%f, %f)\n", 
                   oExt.MinX, oExt.MinY, oExt.MaxX, oExt.MaxY);
        }

        char    *pszWKT;
        
        if( poLayer->GetSpatialRef() == NULL )
            pszWKT = CPLStrdup( "(unknown)" );
        else
        {
            poLayer->GetSpatialRef()->exportToPrettyWkt( &pszWKT );
        }            

        printf( "Layer SRS WKT:\n%s\n", pszWKT );
        CPLFree( pszWKT );
    
        if( strlen(poLayer->GetFIDColumn()) > 0 )
            printf( "FID Column = %s\n", 
                    poLayer->GetFIDColumn() );
    
        if( strlen(poLayer->GetGeometryColumn()) > 0 )
            printf( "Geometry Column = %s\n", 
                    poLayer->GetGeometryColumn() );

        for( int iAttr = 0; iAttr < poDefn->GetFieldCount(); iAttr++ )
        {
            OGRFieldDefn    *poField = poDefn->GetFieldDefn( iAttr );
            
            printf( "%s: %s (%d.%d)\n",
                    poField->GetNameRef(),
                    poField->GetFieldTypeName( poField->GetType() ),
                    poField->GetWidth(),
                    poField->GetPrecision() );
        }
    }

/* -------------------------------------------------------------------- */
/*      Read, and dump features.                                        */
/* -------------------------------------------------------------------- */
    OGRFeature  *poFeature = NULL;

    if( nFetchFID == OGRNullFID && !bSummaryOnly )
    {
        while( (poFeature = poLayer->GetNextFeature()) != NULL )
        {
            poFeature->DumpReadable( NULL, papszOptions );
            OGRFeature::DestroyFeature( poFeature );
        }
    }
    else if( nFetchFID != OGRNullFID )
    {
        poFeature = poLayer->GetFeature( nFetchFID );
        if( poFeature == NULL )
        {
            printf( "Unable to locate feature id %d on this layer.\n", 
                    nFetchFID );
        }
        else
        {
            poFeature->DumpReadable( NULL, papszOptions );
            OGRFeature::DestroyFeature( poFeature );
        }
    }
}

static void ReportOnLayer( OGRLayer * poLayer, int bVerbose )

{
    OGRFeatureDefn      *poDefn = poLayer->GetLayerDefn();


/* -------------------------------------------------------------------- */
/*      Report various overall information.                             */
/* -------------------------------------------------------------------- */
    printf( "\n" );

    printf( "Layer name: %s\n", poLayer->GetName() );

    if( bVerbose )
    {
        int nGeomFieldCount =
            poLayer->GetLayerDefn()->GetGeomFieldCount();
        if( nGeomFieldCount > 1 )
        {
            for(int iGeom = 0;iGeom < nGeomFieldCount; iGeom ++ )
            {
                OGRGeomFieldDefn* poGFldDefn =
                    poLayer->GetLayerDefn()->GetGeomFieldDefn(iGeom);
                printf( "Geometry (%s): %s\n", poGFldDefn->GetNameRef(),
                    OGRGeometryTypeToName( poGFldDefn->GetType() ) );
            }
        }
        else
        {
            printf( "Geometry: %s\n",
                    OGRGeometryTypeToName( poLayer->GetGeomType() ) );
        }

        printf( "Feature Count: " CPL_FRMT_GIB "\n", poLayer->GetFeatureCount() );

        OGREnvelope oExt;
        if( nGeomFieldCount > 1 )
        {
            for(int iGeom = 0;iGeom < nGeomFieldCount; iGeom ++ )
            {
                if (poLayer->GetExtent(iGeom, &oExt, TRUE) == OGRERR_NONE)
                {
                    OGRGeomFieldDefn* poGFldDefn =
                        poLayer->GetLayerDefn()->GetGeomFieldDefn(iGeom);
                    CPLprintf("Extent (%s): (%f, %f) - (%f, %f)\n",
                           poGFldDefn->GetNameRef(),
                           oExt.MinX, oExt.MinY, oExt.MaxX, oExt.MaxY);
                }
            }
        }
        else if ( poLayer->GetExtent(&oExt, TRUE) == OGRERR_NONE)
        {
            CPLprintf("Extent: (%f, %f) - (%f, %f)\n",
                   oExt.MinX, oExt.MinY, oExt.MaxX, oExt.MaxY);
        }

        char    *pszWKT;

        if( nGeomFieldCount > 1 )
        {
            for(int iGeom = 0;iGeom < nGeomFieldCount; iGeom ++ )
            {
                OGRGeomFieldDefn* poGFldDefn =
                    poLayer->GetLayerDefn()->GetGeomFieldDefn(iGeom);
                OGRSpatialReference* poSRS = poGFldDefn->GetSpatialRef();
                if( poSRS == NULL )
                    pszWKT = CPLStrdup( "(unknown)" );
                else
                {
                    poSRS->exportToPrettyWkt( &pszWKT );
                }

                printf( "SRS WKT (%s):\n%s\n",
                        poGFldDefn->GetNameRef(), pszWKT );
                CPLFree( pszWKT );
            }
        }
        else
        {
            if( poLayer->GetSpatialRef() == NULL )
                pszWKT = CPLStrdup( "(unknown)" );
            else
            {
                poLayer->GetSpatialRef()->exportToPrettyWkt( &pszWKT );
            }

            printf( "Layer SRS WKT:\n%s\n", pszWKT );
            CPLFree( pszWKT );
        }

        if( strlen(poLayer->GetFIDColumn()) > 0 )
            printf( "FID Column = %s\n",
                    poLayer->GetFIDColumn() );

        for(int iGeom = 0;iGeom < nGeomFieldCount; iGeom ++ )
        {
            OGRGeomFieldDefn* poGFldDefn =
                poLayer->GetLayerDefn()->GetGeomFieldDefn(iGeom);
            if( nGeomFieldCount == 1 &&
                EQUAL(poGFldDefn->GetNameRef(), "")  && poGFldDefn->IsNullable() )
//.........这里部分代码省略.........

OGRFeature* OGRPLScenesLayer::GetNextRawFeature()
{
    if( bEOF ||
        (!bFilterMustBeClientSideEvaluated && nFeatureCount >= 0 && nNextFID > nFeatureCount) )
        return NULL;

    if( poGeoJSONLayer == NULL )
    {
        if( !GetNextPage() )
            return NULL;
    }

#ifdef notdef
    if( CSLTestBoolean(CPLGetConfigOption("OGR_LIMIT_TOO_MANY_FEATURES", "FALSE")) &&
        nFeatureCount > nPageSize )
    {
        bEOF = TRUE;
        OGRFeature* poFeature = new OGRFeature(poFeatureDefn);
        OGRGeometry* poGeom;
        const char* pszWKT = "MULTIPOLYGON(((-180 90,180 90,180 -90,-180 -90,-180 90)))";
        OGRGeometryFactory::createFromWkt((char**)&pszWKT, poSRS, &poGeom);
        poFeature->SetGeometryDirectly(poGeom);
        return poFeature;
    }
#endif

    OGRFeature* poGeoJSONFeature = poGeoJSONLayer->GetNextFeature();
    if( poGeoJSONFeature == NULL )
    {
        osRequestURL = osNextURL;
        bStillInFirstPage = FALSE;
        if( !GetNextPage() )
            return NULL;
        poGeoJSONFeature = poGeoJSONLayer->GetNextFeature();
        if( poGeoJSONFeature == NULL )
        {
            bEOF = TRUE;
            return NULL;
        }
    }
    OGRFeature* poFeature = new OGRFeature(poFeatureDefn);
    poFeature->SetFID(nNextFID++);

    OGRGeometry* poGeom = poGeoJSONFeature->StealGeometry();
    if( poGeom != NULL )
    {
        if( poGeom->getGeometryType() == wkbPolygon )
        {
            OGRMultiPolygon* poMP = new OGRMultiPolygon();
            poMP->addGeometryDirectly(poGeom);
            poGeom = poMP;
        }
        poGeom->assignSpatialReference(poSRS);
        poFeature->SetGeometryDirectly(poGeom);
    }
    
    for(int i=0;i<poFeatureDefn->GetFieldCount();i++)
    {
        OGRFieldDefn* poFieldDefn = poFeatureDefn->GetFieldDefn(i);
        OGRFieldType eType = poFieldDefn->GetType();
        int iSrcField = poGeoJSONFeature->GetFieldIndex(poFieldDefn->GetNameRef());
        if( iSrcField >= 0 && poGeoJSONFeature->IsFieldSet(iSrcField) )
        {
            if( eType == OFTInteger )
                poFeature->SetField(i,
                    poGeoJSONFeature->GetFieldAsInteger(iSrcField));
            else if( eType == OFTReal )
                poFeature->SetField(i,
                    poGeoJSONFeature->GetFieldAsDouble(iSrcField));
            else
                poFeature->SetField(i,
                    poGeoJSONFeature->GetFieldAsString(iSrcField));
        }
    }

    delete poGeoJSONFeature;

    return poFeature;
}

void GTMTrackLayer::WriteFeatureAttributes( OGRFeature *poFeature )
{
    char* psztrackname = nullptr;
    int type = 1;
    unsigned int color = 0;
    for (int i = 0; i < poFeatureDefn->GetFieldCount(); ++i)
    {
        OGRFieldDefn *poFieldDefn = poFeatureDefn->GetFieldDefn( i );
        if( poFeature->IsFieldSetAndNotNull( i ) )
        {
            const char* l_pszName = poFieldDefn->GetNameRef();
            /* track name */
            if (STARTS_WITH(l_pszName, "name"))
            {
                CPLFree(psztrackname);
                psztrackname = CPLStrdup( poFeature->GetFieldAsString( i ) );
            }
            /* track type */
            else if (STARTS_WITH(l_pszName, "type"))
            {
                type = poFeature->GetFieldAsInteger( i );
                // Check if it is a valid type
                if (type < 1 || type > 30)
                    type = 1;
            }
            /* track color */
            else if (STARTS_WITH(l_pszName, "color"))
            {
                color = (unsigned int) poFeature->GetFieldAsInteger( i );
                if (color > 0xFFFFFF)
                    color = 0xFFFFFFF;
            }
        }
    }

    if (psztrackname == nullptr)
        psztrackname = CPLStrdup( "" );

    const size_t trackNameLength = strlen(psztrackname);

    const size_t bufferSize = 14 + trackNameLength;
    void* pBuffer = CPLMalloc(bufferSize);
    void* pBufferAux = pBuffer;
    /* Write track string name size to buffer */
    appendUShort(pBufferAux, (unsigned short) trackNameLength);
    pBufferAux = (char*)pBufferAux + 2;

    /* Write track name */
    memcpy((char*)pBufferAux, psztrackname, trackNameLength);
    pBufferAux = (char*)pBufferAux + trackNameLength;

    /* Write track type */
    appendUChar(pBufferAux, (unsigned char) type);
    pBufferAux = (char*)pBufferAux + 1;

    /* Write track color */
    appendInt(pBufferAux, color);
    pBufferAux = (char*)pBufferAux + 4;

    /* Write track scale */
    appendFloat(pBufferAux, 0);
    pBufferAux = (char*)pBufferAux + 4;

    /* Write track label */
    appendUChar(pBufferAux, 0);
    pBufferAux = (char*)pBufferAux + 1;

    /* Write track layer */
    appendUShort(pBufferAux, 0);

    VSIFWriteL(pBuffer, bufferSize, 1, poDS->getTmpTracksFP());
    poDS->incNumTracks();

    CPLFree(psztrackname);
    CPLFree(pBuffer);
}

OGRErr OGRFeatureQuery::Compile(OGRFeatureDefn *poDefn,
                                const char *pszExpression)

{
/* -------------------------------------------------------------------- */
/*      Clear any existing expression.                                  */
/* -------------------------------------------------------------------- */
    if (pSWQExpr != NULL)
    {
        delete (swq_expr_node*) pSWQExpr;
        pSWQExpr = NULL;
    }

/* -------------------------------------------------------------------- */
/*      Build list of fields.                                           */
/* -------------------------------------------------------------------- */
    char           **papszFieldNames;
    swq_field_type *paeFieldTypes;
    int            iField;
    int            nFieldCount = poDefn->GetFieldCount() + SPECIAL_FIELD_COUNT;

    papszFieldNames = (char**)
                      CPLMalloc(sizeof(char*) * nFieldCount);
    paeFieldTypes = (swq_field_type*)
                    CPLMalloc(sizeof(swq_field_type) * nFieldCount);

    for (iField = 0; iField < poDefn->GetFieldCount(); iField++)
    {
        OGRFieldDefn *poField = poDefn->GetFieldDefn(iField);

        papszFieldNames[iField] = (char*) poField->GetNameRef();

        switch (poField->GetType())
        {
        case OFTInteger:
            paeFieldTypes[iField] = SWQ_INTEGER;
            break;

        case OFTReal:
            paeFieldTypes[iField] = SWQ_FLOAT;
            break;

        case OFTString:
            paeFieldTypes[iField] = SWQ_STRING;
            break;

        case OFTDate:
        case OFTTime:
        case OFTDateTime:
            paeFieldTypes[iField] = SWQ_TIMESTAMP;
            break;

        default:
            paeFieldTypes[iField] = SWQ_OTHER;
            break;
        }
    }

    iField = 0;

    while (iField < SPECIAL_FIELD_COUNT)
    {
        papszFieldNames[poDefn->GetFieldCount() + iField] = (char*) SpecialFieldNames[iField];
        paeFieldTypes[poDefn->GetFieldCount() + iField]   = SpecialFieldTypes[iField];
        ++iField;
    }

/* -------------------------------------------------------------------- */
/*      Try to parse.                                                   */
/* -------------------------------------------------------------------- */
    OGRErr eErr = OGRERR_NONE;
    CPLErr eCPLErr;

    poTargetDefn = poDefn;
    eCPLErr      = swq_expr_compile(pszExpression, nFieldCount,
                                    papszFieldNames, paeFieldTypes,
                                    (swq_expr_node**) &pSWQExpr);
    if (eCPLErr != CE_None)
    {
        eErr     = OGRERR_CORRUPT_DATA;
        pSWQExpr = NULL;
    }

    CPLFree(papszFieldNames);
    CPLFree(paeFieldTypes);


    return eErr;
}