source: trunk/EventBenchConsole/src/de/ugoe/cs/eventbench/commands/CMDsequenceStatistics.java

package de.ugoe.cs.eventbench.commands;

import java.security.InvalidParameterException;
import java.util.Collection;
import java.util.List;
import java.util.Map.Entry;
import java.util.SortedMap;
import java.util.TreeMap;

import de.ugoe.cs.eventbench.CommandHelpers;
import de.ugoe.cs.eventbench.SequenceInstanceOf;
import de.ugoe.cs.eventbench.data.Event;
import de.ugoe.cs.eventbench.data.GlobalDataContainer;
import de.ugoe.cs.util.console.Command;
import de.ugoe.cs.util.console.Console;

/**
 * <p>
 * Command to print basic statistical information about stored sequences, e.g.,
 * how many there are of which lenght.
 * </p>
 * 
 * @author Steffen Herbold
 * @version 1.0
 */
public class CMDsequenceStatistics implements Command {

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

                Collection<List<Event<?>>> sequences = null;
                Object dataObject = GlobalDataContainer.getInstance().getData(
                                sequencesName);
                if (dataObject == null) {
                        CommandHelpers.objectNotFoundMessage(sequencesName);
                        return;
                }
                if (!SequenceInstanceOf.isCollectionOfSequences(dataObject)) {
                        CommandHelpers.objectNotType(sequencesName,
                                        "Collection<List<Event<?>>>");
                        return;
                }

                sequences = (Collection<List<Event<?>>>) dataObject;
                Console.println("Number of Sequences: " + sequences.size());
                SortedMap<Integer, Integer> lengthMap = new TreeMap<Integer, Integer>();
                for (List<Event<?>> sequence : sequences) {
                        Integer currentSize = sequence.size();
                        if (lengthMap.containsKey(currentSize)) {
                                lengthMap.put(currentSize, lengthMap.get(currentSize) + 1);
                        } else {
                                lengthMap.put(currentSize, 1);
                        }
                }
                for (Entry<Integer, Integer> entry : lengthMap.entrySet()) {
                        Console.println("Of length " + entry.getKey() + ": "
                                        + entry.getValue());
                }
        }

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

}