public Condition <T> Close()
{
Condition <T> condition = stack.Pop();
if (condition.GetType() == typeof(ConditionGroup <T>))
{
ConditionGroup <T> group = (ConditionGroup <T>)condition;
group.Validate();
group.Close();
}
else if (condition.GetType() == typeof(ListCondition <T>))
{
ListCondition <T> list = (ListCondition <T>)condition;
list.Validate();
list.Close();
}
else
{
if (!condition.IsClosed())
{
throw new QueryException(String.Format("Invalid Stack State: Condition is not closed. [type={0}]", condition.GetType().FullName));
}
}
return(condition);
}
public Condition <T> Group()
{
CheckRoot();
ConditionGroup <T> group = new ConditionGroup <T>();
AddCondition(group);
return(group);
}
private void CheckRoot()
{
if (root == null)
{
root = new ConditionGroup <T>();
}
stack.Push(root);
}
private void AddCondition(Condition <T> condition)
{
Condition <T> parent = stack.Peek();
if (parent.GetType() == typeof(ConditionGroup <T>))
{
ConditionGroup <T> group = (ConditionGroup <T>)parent;
if (group.IsClosed())
{
throw new QueryException(String.Format("Invalid Stack State: Group condition is already closed. [type={0}]", group.GetType().FullName));
}
group.Add(condition);
}
else if (parent.GetType() == typeof(AndCondition <T>))
{
AndCondition <T> and = (AndCondition <T>)parent;
if (and.IsClosed())
{
throw new QueryException(String.Format("Invalid Stack State: And condition is already closed. [type={0}]", and.GetType().FullName));
}
and.Add(condition);
}
else if (parent.GetType() == typeof(AndCondition <T>))
{
AndCondition <T> and = (AndCondition <T>)parent;
if (and.IsClosed())
{
throw new QueryException(String.Format("Invalid Stack State: And condition is already closed. [type={0}]", and.GetType().FullName));
}
and.Add(condition);
}
else if (parent.GetType() == typeof(OrCondition <T>))
{
OrCondition <T> or = (OrCondition <T>)parent;
if (or.IsClosed())
{
throw new QueryException(String.Format("Invalid Stack State: Or condition is already closed. [type={0}]", or.GetType().FullName));
}
or.Add(condition);
}
stack.Push(condition);
}