source: trunk/EventBenchConsole/src/de/ugoe/cs/eventbench/efg/commands/CMDefgToMM.java @ 201

package de.ugoe.cs.eventbench.efg.commands;

import java.security.InvalidParameterException;
import java.util.ArrayList;
import java.util.Collection;
import java.util.LinkedList;
import java.util.List;
import java.util.Random;

import de.ugoe.cs.eventbench.data.Event;
import de.ugoe.cs.eventbench.data.GlobalDataContainer;
import de.ugoe.cs.eventbench.efg.data.EFGEvent;
import de.ugoe.cs.eventbench.models.FirstOrderMarkovModel;
import de.ugoe.cs.util.console.Command;
import de.ugoe.cs.util.console.Console;
import edu.umd.cs.guitar.model.GUITARConstants;
import edu.umd.cs.guitar.model.IO;
import edu.umd.cs.guitar.model.data.EFG;
import edu.umd.cs.guitar.model.data.EventGraphType;
import edu.umd.cs.guitar.model.data.EventType;

/**
 * <p>
 * Command to that loads an EFG and creates a first-order Markov model with the
 * same structure.
 * </p>
 * 
 * @author Steffen Herbold
 * @version 1.0
 */
public class CMDefgToMM implements Command {

        /*
         * (non-Javadoc)
         * 
         * @see de.ugoe.cs.util.console.Command#run(java.util.List)
         */
        @Override
        public void run(List<Object> parameters) {
                String filename;
                String modelname;
                try {
                        filename = (String) parameters.get(0);
                        modelname = (String) parameters.get(1);
                } catch (Exception e) {
                        throw new InvalidParameterException();
                }

                EFG efg = (EFG) IO.readObjFromFile(filename, EFG.class);

                // extracting the events from the EFG
                List<EventType> efgEvents = efg.getEvents().getEvent();
                List<Event<?>> myEvents = new ArrayList<Event<?>>(efgEvents.size());
                for (EventType event : efgEvents) {
                        /*
                         * the widgetId and eventId are only hash values, 
                         * the "interpretation" is found in the GUI file. 
                         */
                        String eventTarget = event.getWidgetId();
                        String eventId = event.getEventId();
                        
                        /* 
                         * Not sure what these are used for.
                        String eventType = event.getType();
                        String eventAction = event.getAction();
                         */

                        Event<?> myEvent = new EFGEvent(eventId);
                        myEvent.setTarget(eventTarget);
                        myEvents.add(myEvent);
                }

                // extracting graph structure from the EFG
                /*
                 * getEventGraph returns an adjacency matrix, i.e., a square matrix of
                 * efgEvents.size(), where a 1 in row i, column j means an edge
                 * efgEvents.get(i)->efgEvents.get(j) exists.
                 */
                EventGraphType efgGraph = efg.getEventGraph();

                FirstOrderMarkovModel model = new FirstOrderMarkovModel(new Random());
                Collection<List<Event<?>>> subsequences = new LinkedList<List<Event<?>>>();

                int efgSize = efgEvents.size();
                for (int row = 0; row < efgSize; row++) {
                        for (int col = 0; col < efgSize; col++) {
                                int relation = efgGraph.getRow().get(row).getE().get(col);
                                // otherEvent is followed by currentEvent
                                if (relation != GUITARConstants.NO_EDGE) {
                                        List<Event<?>> edge = new LinkedList<Event<?>>();
                                        edge.add(myEvents.get(row));
                                        edge.add(myEvents.get(col));
                                        subsequences.add(edge);
                                }
                        }
                }
                model.train(subsequences);
                GlobalDataContainer.getInstance().addData(modelname, model);
        }

        /*
         * (non-Javadoc)
         * 
         * @see de.ugoe.cs.util.console.Command#help()
         */
        @Override
        public void help() {
                Console.println("Usage: efgToMM <filename> <modelname>");
        }

}