/*
*
* RandomDataCollectorTimeStamped.java of project jchart2d, collects time stamped
* random data for demo purposes.
* Copyright (C) 2005 - 2011 Achim Westermann, created on 20.03.2005, 16:59:10
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*
* If you modify or optimize the code in a useful way please let me know.
* Achim.Westermann@gmx.de
*
*/
package info.monitorenter.gui.chart.io;
import info.monitorenter.gui.chart.ITrace2D;
import info.monitorenter.gui.chart.ITracePoint2D;
import info.monitorenter.gui.chart.TracePoint2D;
/**
* Data collector that collects values with an absolute timestamp as x value and
* a random jumping y value.
* <p>
*
* @author <a href="mailto:Achim.Westermann@gmx.de">Achim Westermann </a>
*
* @version $Revision: 1.9 $
*/
public class RandomDataCollectorTimeStamped extends ADataCollector {
/** The last collected y value. */
private double m_y = 0.0;
/**
* Creates an instance that will collect every latency ms a point and add it
* to the trace.
* <p>
*
* @param trace
* the trace to add collected points to.
*
* @param latency
* the interval in ms for collecting points.
*/
public RandomDataCollectorTimeStamped(final ITrace2D trace, final int latency) {
super(trace, latency);
}
/**
* @see ADataCollector#collectData()
*/
@Override
public ITracePoint2D collectData() {
double rand = Math.random();
boolean add = (rand >= 0.5) ? true : false;
this.m_y = (add) ? this.m_y + Math.random() : this.m_y - Math.random();
return new TracePoint2D(System.currentTimeMillis(), this.m_y);
}
}