/**
 * Jeff Rupp
 * Master's Thesis
 * 2005
 *
 * Summarizes the interesting statistics of the system
 *
 * Singleton class
 */

package jdr.mobisim;

import jdr.utils.*;
import java.util.*;

import org.apache.log4j.*;



public class Statistics
{
    private static Logger m_logger = Logger.getLogger(Statistics.class);

    private static Statistics s_instance = null;

    private double m_busyTics = 0.0;
    private double m_idleTics = 0.0;

    private Vector m_linesVector = new Vector();


    public Statistics()
    {
    }


    public static Statistics getInstance()
    {
        if(s_instance == null)
        {
            s_instance = new Statistics();
        }
        return s_instance;
    }


    public void IncBusyTics(int tics)
    {
        if(tics > 0)
        {
            m_busyTics += tics;
        }
    }

    public void IncIdleTics(int tics)
    {
        if(tics > 0)
        {
            m_idleTics += tics;
        }
    }

    public void ClearStatistics()
    {
        // ??? clear stats
        m_idleTics = 0;
        m_busyTics = 0;
        synchronized(m_linesVector)
        {
            int size = m_linesVector.size();
            for(int i = 0; i < size; ++i)
            {
                ((LineInfo)m_linesVector.get(i)).clearPoints();
            }
        }
    }

    /**
     * the stats class also keeps track of the lines, to make it easy to clear out any data they
     *   contain when the stats are cleared.
     */
    public void AddLine(LineInfo lif)
    {
        synchronized(m_linesVector)
        {
            m_linesVector.addElement(lif);
        }
    }




} // end class definition