Java Tutorial Code 4: Performing Inference in Influence Diagrams

From DSL

public void InferenceWithInfluenceDiagram() {
 try {
   // Loading and updating the influence diagram: 
   Network net = new Network();
   net.readFile("tutorial_b.xdsl");
   net.updateBeliefs();
   
   // Getting the utility node's handle:
   net.getNode("Gain");
   
   // Getting the handle and the name of value indexing parent (decision node):
   int[] aValueIndexingParents = net.getValueIndexingParents("Gain");
   int nodeDecision = aValueIndexingParents[0];
   String decisionName = net.getNodeName(nodeDecision);
   
   // Displaying the possible expected values:
   System.out.println("These are the expected utilities:");
   for (int i = 0; i < net.getOutcomeCount(nodeDecision); i++) {
     String parentOutcomeId = net.getOutcomeId(nodeDecision, i);
     double expectedUtility = net.getNodeValue("Gain")[i];
     
     System.out.print("  - \"" + decisionName + "\" = " + parentOutcomeId + ": ");
     System.out.println("Expected Utility = " + expectedUtility);
   }
 }
 catch (SMILEException e) {
   System.out.println(e.getMessage());
 }
}