OGRErr OGRIDBTableLayer::ISetFeature( OGRFeature *poFeature )
{
OGRErr eErr(OGRERR_FAILURE);
if ( ! bUpdateAccess )
{
CPLError( CE_Failure, CPLE_AppDefined,
"Error update feature. Layer is read only." );
return eErr;
}
if( NULL == poFeature )
{
CPLError( CE_Failure, CPLE_AppDefined,
"NULL pointer to OGRFeature passed to SetFeature()." );
return eErr;
}
if( poFeature->GetFID() == OGRNullFID )
{
CPLError( CE_Failure, CPLE_AppDefined,
"FID required on features given to SetFeature()." );
return eErr;
}
ITStatement oQuery( *poDS->GetConnection() );
int bUpdateGeom = TRUE;
OGRwkbGeometryType nGeomType = poFeature->GetGeometryRef()->getGeometryType();
CPLString osGeomFunc;
int nSrid = 0; // FIXME Obtain geometry SRID
switch (nGeomType)
{
case wkbPoint:
osGeomFunc = "ST_PointFromText";
break;
case wkbLineString:
osGeomFunc = "ST_LineFromText";
break;
case wkbPolygon:
osGeomFunc = "ST_PolyFromText";
break;
case wkbMultiPoint:
osGeomFunc = "ST_MPointFromText";
break;
case wkbMultiLineString:
osGeomFunc = "ST_MLineFromText";
break;
case wkbMultiPolygon:
osGeomFunc = "ST_MPolyFromText";
break;
default:
bUpdateGeom = FALSE;
CPLDebug("OGR_IDB", "SetFeature(): Unknown geometry type. Geometry will not be updated.");
}
// Create query
CPLString osSql;
CPLString osFields;
if ( pszGeomColumn && bUpdateGeom )
{
osFields.Printf( "%s = %s( ?, %d )", pszGeomColumn, osGeomFunc.c_str(), nSrid );
}
for( int i = 0; i < poFeatureDefn->GetFieldCount(); i++ )
{
const char * pszFieldName = poFeatureDefn->GetFieldDefn(i)->GetNameRef();
// skip fid column from update
if ( EQUAL( pszFIDColumn, pszFieldName ) )
continue;
if ( ! osFields.empty() )
{
osFields += ",";
}
osFields += pszFieldName;
osFields += "=?";
}
osSql.Printf( "UPDATE %s SET %s WHERE %s = %d",
poFeatureDefn->GetName(),
osFields.c_str(),
pszFIDColumn,
poFeature->GetFID() );
if ( ! oQuery.Prepare( osSql.c_str() ) )
{
CPLError( CE_Failure, CPLE_AppDefined,
"Error prepare SQL.\n%s",osSql.c_str() );
return eErr;
}
int iParam = 0;
if ( pszGeomColumn && bUpdateGeom )
{
ITValue * par = oQuery.Param( iParam ); // it should be a geom value
if ( ! par )
{
CPLError( CE_Failure, CPLE_AppDefined,
"Error prepare geom param");
return eErr;
}
OGRGeometry * poGeom = poFeature->GetGeometryRef();
char * wkt;
poGeom->exportToWkt( &wkt );
if( ! par->FromPrintable( wkt ) )
{
CPLError( CE_Failure, CPLE_AppDefined,
"Error prepare geom param");
par->Release();
return eErr;
}
CPLFree( wkt );
par->Release();
iParam++;
}
for ( int i = 0; i < poFeatureDefn->GetFieldCount(); i++ )
{
ITValue * par = oQuery.Param( iParam );
if ( ! par )
{
CPLError( CE_Failure, CPLE_AppDefined,
"Error prepare param %d", iParam);
return eErr;
}
if ( ! poFeature->IsFieldSet( i ) )
{
if ( ! par->SetNull() )
{
CPLError( CE_Failure, CPLE_AppDefined,
"Error set param %d to NULL", iParam);
par->Release();
return eErr;
}
par->Release();
continue;
}
ITConversions * cv = 0;
bool res = FALSE;
if ( par->QueryInterface( ITConversionsIID, (void **) &cv) !=
IT_QUERYINTERFACE_SUCCESS )
{
CPLError( CE_Failure, CPLE_AppDefined,
"Error prepare param %d", iParam);
par->Release();
return eErr;
}
switch ( poFeatureDefn->GetFieldDefn( i )->GetType() )
{
case OFTInteger:
res = cv->ConvertFrom( poFeature->GetFieldAsInteger( i ) );
break;
case OFTReal:
res = cv->ConvertFrom( poFeature->GetFieldAsDouble( i ) );
break;
case OFTIntegerList:
case OFTRealList:
case OFTStringList:
// FIXME Prepare array of values field
//cv->ConvertFrom( poFeature->GetFieldAsStringList( i ) );
//break;
case OFTBinary:
// FIXME Prepare binary field
case OFTString:
case OFTDate:
case OFTTime:
case OFTDateTime:
res = cv->ConvertFrom( poFeature->GetFieldAsString( i ) );
break;
default:
CPLError( CE_Failure, CPLE_AppDefined,
"Error prepare param %d. Unknown data type.", iParam);
cv->Release();
par->Release();
return eErr;
}
if ( res != TRUE )
CPLError( CE_Failure, CPLE_AppDefined,
"Error prepare param.");
cv->Release();
par->Release();
}
CPLDebug( "OGR_IDB", "ExecuteSQL(%s)", oQuery.QueryText().Data() );
if( !oQuery.Exec() )
{
CPLError( CE_Failure, CPLE_AppDefined, "Error update Feature.");
return eErr;
}
return OGRERR_NONE;
}
