source: trunk/EventBenchConsole/src/de/ugoe/cs/eventbench/commands/CMDcalcEntropy.java @ 183

package de.ugoe.cs.eventbench.commands;
import java.security.InvalidParameterException;
import java.util.List;

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

/**
 * <p>
 * Command to calculate the entropy of first-order Markov models.
 * </p>
 * 
 * @author Steffen Herbold
 * @version 1.0
 */
public class CMDcalcEntropy implements Command {

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

        /* (non-Javadoc)
         * @see de.ugoe.cs.util.console.Command#run(java.util.List)
         */
        @Override
        public void run(List<Object> parameters) {
                String modelname = "";
                try {
                        modelname = (String) parameters.get(0);
                } catch (Exception e) {
                        throw new InvalidParameterException();
                }
                
                FirstOrderMarkovModel model = null; 
                Object dataObject = GlobalDataContainer.getInstance().getData(modelname);
                if( dataObject==null ) {
                        Console.println("Model " + modelname + "not found in storage.");
                }
                else if( !(dataObject instanceof FirstOrderMarkovModel) ) {
                        Console.println("Object " + modelname + " is not a first-order Markov model!");
                } else {
                        model = (FirstOrderMarkovModel) dataObject;
                        double entropy = model.calcEntropy();
                        if( !Double.isNaN(entropy) ) {
                                Console.println("entropy: " + entropy);
                        }
                }
        }

}