OGRFeature *OGRIDBLayer::GetNextRawFeature()
{
if( GetQuery() == NULL )
return NULL;
/* -------------------------------------------------------------------- */
/* If we are marked to restart then do so, and fetch a record. */
/* -------------------------------------------------------------------- */
ITRow * row = poCurr->NextRow();
if ( ! row )
{
delete poCurr;
poCurr = NULL;
return NULL;
}
iNextShapeId++;
m_nFeaturesRead++;
/* -------------------------------------------------------------------- */
/* Create a feature from the current result. */
/* -------------------------------------------------------------------- */
int iField;
OGRFeature *poFeature = new OGRFeature( poFeatureDefn );
const ITTypeInfo * poRowType = poCurr->RowType();
int nFieldCount = poRowType->ColumnCount();
for ( iField = 0; iField < nFieldCount; iField++ )
{
/* -------------------------------------------------------------------- */
/* Handle FID column */
/* -------------------------------------------------------------------- */
if ( pszFIDColumn != NULL &&
EQUAL( poRowType->ColumnName( iField ), pszFIDColumn ) )
poFeature->SetFID( atoi( row->Column( iField )->Printable() ) );
/* -------------------------------------------------------------------- */
/* Handle geometry */
/* -------------------------------------------------------------------- */
if( pszGeomColumn != NULL &&
EQUAL( poRowType->ColumnName( iField ), pszGeomColumn ) )
{
OGRGeometry *poGeom = NULL;
OGRErr eErr = OGRERR_NONE;
ITValue * v = row->Column( iField );
if( ! v->IsNull() && ! bGeomColumnWKB )
{
const char *pszGeomText = v->Printable();
if ( pszGeomText != NULL )
eErr =
OGRGeometryFactory::createFromWkt((char **) &pszGeomText,
poSRS, &poGeom);
}
else if( ! v->IsNull() && bGeomColumnWKB )
{
ITDatum *rv = 0;
if ( v->QueryInterface( ITDatumIID, (void **) &rv ) ==
IT_QUERYINTERFACE_SUCCESS )
{
int nLength = rv->DataLength();
unsigned char * wkb = (unsigned char *)rv->Data();
eErr = OGRGeometryFactory::createFromWkb( wkb, poSRS, &poGeom, nLength);
rv->Release();
}
}
v->Release();
if ( eErr != OGRERR_NONE )
{
const char *pszMessage;
switch ( eErr )
{
case OGRERR_NOT_ENOUGH_DATA:
pszMessage = "Not enough data to deserialize";
break;
case OGRERR_UNSUPPORTED_GEOMETRY_TYPE:
pszMessage = "Unsupported geometry type";
break;
case OGRERR_CORRUPT_DATA:
pszMessage = "Corrupt data";
default:
pszMessage = "Unrecognized error";
}
CPLError(CE_Failure, CPLE_AppDefined,
"GetNextRawFeature(): %s", pszMessage);
}
if( poGeom != NULL )
{
poFeature->SetGeometryDirectly( poGeom );
}
continue;
}
/* -------------------------------------------------------------------- */
/* Transfer regular data fields. */
/* -------------------------------------------------------------------- */
int iOGRField =
poFeatureDefn->GetFieldIndex( poRowType->ColumnName( iField ) );
if( iOGRField < 0 )
continue;
const char * pszColData = row->Column( iField )->Printable();
if( ! pszColData )
continue;
if( poFeatureDefn->GetFieldDefn(iOGRField)->GetType() == OFTBinary )
poFeature->SetField( iOGRField,
poRowType->ColumnType( iField )->Size(),
(GByte *) pszColData );
else
poFeature->SetField( iOGRField, pszColData );
}
row->Release();
return poFeature;
}
