private Func <string, Action <Rule> > FindOrCreateRuleList(IDictionary <string, RuleList> dict, bool immediate, bool clearFirst)
{
return((s) =>
{
PNode node = FindKB(s);
if (immediate)
{
if (node == null)
{
node = FindOrCreateKB(s);
}
}
RuleList rl;
lock (dict)
{
if (!dict.TryGetValue(s, out rl))
{
if (node != null)
{
if (clearFirst && immediate)
{
node.Clear();
}
}
rl = dict[s] = new RuleList();
}
}
bool immedAdd = immediate && node != null;
if (!immedAdd)
{
return (r) => rl.Add(r);
}
return r =>
{
rl.Add(r);
node.AddImmediate(r);
};
});
}