source: trunk/EventBenchConsole/src/de/ugoe/cs/eventbench/commands/CMDgenerateRandomSequences.java @ 231

package de.ugoe.cs.eventbench.commands;

import java.security.InvalidParameterException;
import java.util.HashSet;
import java.util.List;
import java.util.Set;

import de.ugoe.cs.eventbench.data.GlobalDataContainer;
import de.ugoe.cs.eventbench.data.Event;
import de.ugoe.cs.eventbench.models.IStochasticProcess;
import de.ugoe.cs.util.console.Command;
import de.ugoe.cs.util.console.Console;

/**
 * <p>
 * Command to generate random sessions.
 * </p>
 * 
 * @author Steffen Herbold
 * @version 1.0
 */
public class CMDgenerateRandomSequences implements Command {

        /*
         * (non-Javadoc)
         * 
         * @see de.ugoe.cs.util.console.Command#run(java.util.List)
         */
        @Override
        public void run(List<Object> parameters) {
                String modelname;
                String sequencesName;
                int numSessions;
                long maxIter;
                int minLength = 0;
                int maxLength = Integer.MAX_VALUE;
                try {
                        modelname = (String) parameters.get(0);
                        sequencesName = (String) parameters.get(1);
                        numSessions = Integer.parseInt((String) parameters.get(2));
                        maxIter = numSessions * 10;
                        if (parameters.size() >= 4) {
                                maxIter = Long.parseLong((String) parameters.get(3));
                        }
                        if (parameters.size() >= 5) {
                                minLength = Integer.parseInt((String) parameters.get(4));
                        }
                        if (parameters.size() >= 6) {
                                maxLength = Integer.parseInt((String) parameters.get(5));
                        }
                } catch (Exception e) {
                        throw new InvalidParameterException();
                }

                IStochasticProcess model = null;
                Object dataObject = GlobalDataContainer.getInstance()
                                .getData(modelname);
                if (dataObject == null) {
                        Console.println("Model " + modelname + " not found in storage.");
                        return;
                }
                if (!(dataObject instanceof IStochasticProcess)) {
                        Console.println("Object " + modelname + " not of type MarkovModel!");
                        return;
                }
                model = (IStochasticProcess) dataObject;
                Set<List<? extends Event<?>>> sequences = new HashSet<List<? extends Event<?>>>(
                                numSessions);
                long numIterations = 0;
                while (sequences.size() < numSessions && numIterations < maxIter) {
                        List<? extends Event<?>> generatedSequence = model.randomSequence();
                        if (generatedSequence.size() >= minLength
                                        && generatedSequence.size() <= maxLength) {
                                sequences.add(generatedSequence);
                        }
                        numIterations++;
                }
                if (sequences.size() < numSessions) {
                        Console.println("Only " + sequences.size()
                                        + " unique sessions generated after " + maxIter
                                        + " iterations");
                }
                if (GlobalDataContainer.getInstance().addData(sequencesName, sequences)) {
                        Console.traceln("Old data \"" + sequencesName + "\" overwritten");
                }
        }

        /*
         * (non-Javadoc)
         * 
         * @see de.ugoe.cs.util.console.Command#help()
         */
        @Override
        public void help() {
                Console.println("Usage: generateRandomSequenecs <modelName> <sequencesName> <numSessions> {<maxIter> <minLength> <maxLength>}");
        }

}