EsperTest.CEPListener.java Source code

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Here is the source code for EsperTest.CEPListener.java

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/*
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package EsperTest;

import com.espertech.esper.client.*;
import java.util.List;
import java.util.Map;
import weka.core.*;
import weka.associations.Apriori;
import weka.filters.Filter;
import weka.filters.unsupervised.attribute.Add;

/**
 *
 * @author gs023850
 */
public class CEPListener implements UpdateListener {

    private FastVector dataSet = new FastVector();
    private FastVector eventValues = new FastVector();
    NominalLabels labels;
    int columnNumbers[];

    public void SetLabels(NominalLabels labels) {
        this.labels = labels;
    }

    public void SetColNumber(int colNumbers[]) {
        columnNumbers = colNumbers;
    }

    public void update(EventBean[] newData, EventBean[] oldData) {

        System.out.println("Event received: " + newData[0].getUnderlying());
        if (newData.length > 2) {
            //create the column name and type, these are strings
            //http://weka.wikispaces.com/Creating+an+ARFF+file
            Instances data;
            FastVector atts = new FastVector();

            for (int j = 0; j < columnNumbers.length; j++) {
                FastVector values = new FastVector();
                for (int i = 0; i < labels.NominalCount(j); i++) {
                    values.addElement(labels.GetLabel(columnNumbers[j], i));
                }
                atts.addElement(new Attribute(labels.GetHeader(columnNumbers[j]), values));
            }

            data = new Instances("Title", atts, 0);

            for (int i = 0; i < newData.length; i++) {
                Instance inst = new Instance(columnNumbers.length);
                for (int j = 0; j < columnNumbers.length; j++) {
                    inst.setValue(j, newData[i].get("eventType").toString());
                }
                data.add(inst);
            }

            Apriori aprioriObj = new weka.associations.Apriori();

            try {
                aprioriObj.buildAssociations(data);
            } catch (Exception e) {
                System.out.println(e);
            }

            FastVector rules[] = aprioriObj.getAllTheRules();

        }

    }

}