static internal RLSFilterExpression Get(ModelRole role, Table table)
{
RLSFilterExpression result;
if (!role.RowLevelSecurity.FilterExpressions.TryGetValue(table, out result))
{
result = new RLSFilterExpression(role, table);
role.RowLevelSecurity.FilterExpressions.Add(table, result);
}
return(result);
}
protected override void SetValue(Table table, string filterExpression)
{
var tps = Role.MetadataObject.TablePermissions;
var tp = tps.Find(table.Name);
// Filter expression removed:
if (string.IsNullOrWhiteSpace(filterExpression))
{
// Don't do anything if there is no TablePermission for this table anyway:
if (tp == null)
{
return;
}
// Otherwise, remove the TablePermission:
tps.Remove(tp);
Handler.UndoManager.Add(new UndoPropertyChangedAction(Role, "RowLevelSecurity", tp.FilterExpression, null, table.Name));
RLSFilterExpression rls;
if (FilterExpressions.TryGetValue(table, out rls))
{
FormulaFixup.ClearDependsOn(rls);
_filterExpressions.Remove(table);
}
}
else // Filter expression assigned:
{
// Create a new TablePermission if we don't already have one for this table:
if (tp == null)
{
tp = new TOM.TablePermission()
{
Table = table.MetadataObject
};
tps.Add(tp);
}
// Assign the new expression to the TablePermission:
var oldValue = tp.FilterExpression;
tp.FilterExpression = filterExpression;
Role.Handler.UndoManager.Add(new UndoPropertyChangedAction(Role, "RowLevelSecurity", oldValue, filterExpression, table.Name));
if (!Handler.NameChangeInProgress)
{
var rls = RLSFilterExpression.Get(Role, table);
FormulaFixup.BuildDependencyTree(rls);
}
}
}
