private void NegativeNodeRightActivation(Negative_Node node, WME w)
{
foreach (Token t in node.Items)
{
if (PerformJoinTests(node.Tests, t, w))
{
if (t.Join_Results.Count == 0)
{
DeleteDescendentsOfToken(t);
}
Negative_Join_Result jr = new Negative_Join_Result();
jr.Owner = t;
jr.WME = w;
t.Join_Results.Insert(0, jr);
w.Negative_Join_Results.Insert(0, jr);
}
}
}
// for supporting negated conditions
private void NegativeNodeLeftActivation(Negative_Node node, Token t, WME w)
{
// build and store a new token, just like a beta memory would
Token new_token = Make_Token(node, t, w);
node.Items.Insert(0, new_token);
// compute the join results
new_token.Join_Results.Clear();
foreach (WME item in node.Amem.Items)
{
if (PerformJoinTests(node.Tests, new_token, item))
{
Negative_Join_Result jr = new Negative_Join_Result();
jr.Owner = new_token;
jr.WME = w;
new_token.Join_Results.Insert(0, jr);
if (w != null)
{
w.Negative_Join_Results.Insert(0, jr);
}
}
}
// if join results is empty, then inform children
if (new_token.Join_Results.Count == 0)
{
foreach (ReteNode child in node.Children)
{
//Beta_Memory_Left_Activation((Beta_Memory)child, new_token, null);
// foamliu, 2008/08/26, use a general method here
// to support both join-node and negative-node.
LeftActivation(child, new_token, null);
}
}
}
