/**
* Correct costs of successors of the input vertex using backward star form.
* (FLOWER)
*
* @param vertex
*/
public void CorrectCostBackward(BaseVertex vertex)
{
// 1. initialize the list of vertex to be updated
var vertexList = new java.util.LinkedList <BaseVertex>();
vertexList.add(vertex);
// 2. update the cost of relevant precedents of the input vertex
while (!vertexList.isEmpty())
{
BaseVertex curVertex = vertexList.remove(0);
double costOfCurVertex = startVertexDistanceIndex[curVertex];
ISet <BaseVertex> preVertexSet = graph.GetPrecedentVertices(curVertex);
foreach (BaseVertex preVertex in preVertexSet)
{
double costOfPreVertex = startVertexDistanceIndex.ContainsKey(preVertex) ?
startVertexDistanceIndex[preVertex] : Graph.DISCONNECTED;
double freshCost = costOfCurVertex + graph.GetEdgeWeight(preVertex, curVertex);
if (costOfPreVertex > freshCost)
{
startVertexDistanceIndex.AddOrReplace(preVertex, freshCost);
predecessorIndex.AddOrReplace(preVertex, curVertex);
vertexList.add(preVertex);
}
}
}
}
protected internal virtual void createPrimitives(ViewGraphNode root)
{
LinkedList queue = new LinkedList();
queue.add(root);
while (!queue.isEmpty())
{
ViewGraphNode act = (ViewGraphNode)queue.remove(0);
Shape s = null;
if (act.Shape == null)
{
s = makeShapeFromNode(act, queue);
}
else
{
s = act.Shape;
}
if (act.ParentsChecked)
{
continue;
}
act.ParentsChecked = true;
for (Iterator it = act.Parents.iterator(); it.hasNext();)
{
ViewGraphNode n = (ViewGraphNode)it.next();
Shape s1 = n.Shape;
if (s1 == null)
{
s1 = makeShapeFromNode(n, queue);
}
ConnectorLine line = new ConnectorLine(s1, s);
line.Color = System.Drawing.Color.Blue;
if (n.ReteNode is BaseJoin)
{
line.Color = System.Drawing.Color.Red;
}
addPrimitive(line);
}
}
}
protected internal virtual void createPrimitives(ViewGraphNode root)
{
LinkedList queue = new LinkedList();
queue.add(root);
while (!queue.isEmpty())
{
ViewGraphNode act = (ViewGraphNode) queue.remove(0);
Shape s = null;
if (act.Shape == null)
{
s = makeShapeFromNode(act, queue);
}
else
{
s = act.Shape;
}
if (act.ParentsChecked)
continue;
act.ParentsChecked = true;
for (Iterator it = act.Parents.iterator(); it.hasNext(); )
{
ViewGraphNode n = (ViewGraphNode) it.next();
Shape s1 = n.Shape;
if (s1 == null)
s1 = makeShapeFromNode(n, queue);
ConnectorLine line = new ConnectorLine(s1, s);
line.Color = System.Drawing.Color.Blue;
if (n.ReteNode is BaseJoin)
line.Color = System.Drawing.Color.Red;
addPrimitive(line);
}
}
}
/**
* Check if it's empty.
* @return
*/
public bool IsEmpty()
{
return(elementWeightPairList.isEmpty());
}