private ReteNode BuildOrShareNegativeNode(ReteNode parent, Alpha_Memory am, List <Test_At_Join_Node> tests)
{
// look for an existing node to share
foreach (ReteNode child in parent.Children)
{
if (child.Type == ReteNodeType.Negative_Node)
{
Negative_Node n_node = (Negative_Node)child;
if (n_node.Amem.Equals(am) && Test_At_Join_Node.IsListEquals(n_node.Tests, tests))
{
return(child);
}
}
}
Negative_Node new_n_node = new Negative_Node();
new_n_node.Type = ReteNodeType.Negative_Node;
new_n_node.Parent = parent;
// insert new at the head of the list parent.children
parent.Children.Insert(0, new_n_node);
//new_n_node.Children.Clear();
//new_n_node.Items.Clear();
new_n_node.Tests = tests;
new_n_node.Amem = am;
am.Successors.Insert(0, new_n_node);
return(new_n_node);
}
private ReteNode BuildOrShareJoinNode(ReteNode parent, Alpha_Memory am, List <Test_At_Join_Node> tests)
{
// look for an existing node to share
foreach (ReteNode child in parent.Children)
{
Join_Node j_node = child as Join_Node;
if (null != j_node)
{
if (j_node.Amem.Equals(am) && Test_At_Join_Node.IsListEquals(j_node.Tests, tests))
{
return(child);
}
}
}
Join_Node new_j_node = new Join_Node();
new_j_node.Parent = parent;
// insert new at the head of the list parent.children
parent.Children.Insert(0, new_j_node);
// foamliu, 2008/11/29, new object, no need.
//new_j_node.Children.Clear();
new_j_node.Tests = tests;
new_j_node.Amem = am;
am.Successors.Insert(0, new_j_node);
return(new_j_node);
}
