Xml_reader.java

import java.io.File;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;

import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;

import org.w3c.dom.Document;
import org.w3c.dom.NodeList;
import org.w3c.dom.Node;
import org.w3c.dom.Element;

public class Xml_reader{
    public static void readXml(String fileName,Network bayesianNetwork ){
        try {
            File xmlDoc = new File(fileName);
            DocumentBuilderFactory fact = DocumentBuilderFactory.newInstance();
            DocumentBuilder builder = fact.newDocumentBuilder();
            Document doc = builder.parse(xmlDoc);


            NodeList variableList = doc.getElementsByTagName("VARIABLE");
            for (int i = 0; i < variableList.getLength(); i++) {
                Node nNode = variableList.item(i); //grabbing one Variable

                //we want to read the subElements only if the element actually has subElements instead of text only
                if (nNode.getNodeType() == Node.ELEMENT_NODE) {
                    Element eElement = (Element) nNode;

                    String Name = eElement.getElementsByTagName("NAME").item(0).getTextContent();
                    Variable var = new Variable(Name);

                    int j=0;
                    while (eElement.getElementsByTagName("OUTCOME").item(j)!=null){
                        String outcome = eElement.getElementsByTagName("OUTCOME").item(j).getTextContent();
                        var.setOutcomeList(outcome);
                        j++;
                    }
                    //System.out.println(var.getCpt());
                    bayesianNetwork.addVar(var);
                }
            }

            NodeList definitionList = doc.getElementsByTagName("DEFINITION");
            for (int i = 0; i < definitionList.getLength(); i++) {
                Node dNode = definitionList.item(i); //grabbing one Definition

                //we want to read the subElements only if the element actually has subElements instead of text only
                if (dNode.getNodeType() == Node.ELEMENT_NODE) {
                    Element eElement = (Element) dNode;

                    String FOR = eElement.getElementsByTagName("FOR").item(0).getTextContent();

                    Definition def = new Definition(FOR);

                    int j=0;
                    while (eElement.getElementsByTagName("GIVEN").item(j)!=null){
                        String given = eElement.getElementsByTagName("GIVEN").item(j).getTextContent();

                        if (eElement.getElementsByTagName("GIVEN").item(j)!=null)
                            bayesianNetwork.getVarbyName(FOR).setParents(given);
                        def.setGivenList(given);
                        j++;
                    }
//                    System.out.println(bayesianNetwork.getVarbyName("A").getOutcomeList());

                    String table = eElement.getElementsByTagName("TABLE").item(0).getTextContent();
                    updateCpt(FOR,bayesianNetwork,table);
                    def.setTableList(table);
                    bayesianNetwork.addDef(def);
                }
            }
        }
        catch (Exception e) {
            System.out.println("something went wrong");
            System.out.println(e.getMessage());
            e.printStackTrace();
        }
    }
    public static void updateCpt(String varName, Network net,String table){
        String[] cptVal = table.split(" ");

        ArrayList<Integer> outComes = new ArrayList<>();
        int counter = 1;
        ArrayList<String> varIn = new ArrayList<>();
        varIn.add(varName);
        for (int i = 0; i <net.getVarbyName(varName).getParents().size() ; i++) {
            varIn.add(net.getVarbyName(varName).getParents().get(i));
        }
        for (int i = 0; i <varIn.size() ; i++) {
            outComes.add(counter);
            counter*= net.getVarbyName(varIn.get(i)).getOutcomeList().size();
        }
        String[][] cpt = new String[counter][varIn.size()+1];
        for (int i = 0; i < counter; i++) {
            cpt[i][varIn.size()] = cptVal[i];
        }
        for (int k = 0; k <varIn.size(); k++) {
            int switcher = 0;
            for (int l = 0; l < counter; l++) {
                if(l>0 && l%outComes.get(k)==0)
                    switcher+=1;
                int s = net.getVarbyName(varIn.get(k)).getOutcomeList().size();
                cpt[l][k] = varIn.get(k)+"="+net.getVarbyName(varIn.get(k)).getOutcomeList().get(switcher%s);
            }
        }
        net.getVarbyName(varName).setCpt(cpt);
//        for (int i = 0; i < cpt.length; i++) {
//            System.out.println(Arrays.toString(cpt[i])+",");
//        }
    }

}