Frequency.java

/*******************************************************************************
 * Copyright (c) 2003-2005, 2013 Till Zoppke.
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the GNU Public License v3.0
 * which accompanies this distribution, and is available at
 * http://www.gnu.org/licenses/gpl.html
 * 
 * Contributors:
 *     Till Zoppke - initial API and implementation
 ******************************************************************************/
/*
 * Created on 31.03.2004
 */
package eniac.simulation;

/**
 * @author zoppke
 */
public class Frequency {

	private double _min;

	private double _logMaxDivMin;

	private Double _linear;

	private Double _logarithmic;

	public Frequency(double min, double max) {
		_min = min;
		_logMaxDivMin = Math.log(max / min);
	}

	public void setLinear(double d) {
		_linear = new Double(d);
	}

	public void setLogarithmic(double d) {
		_logarithmic = new Double(d);
	}

	public double logarithmic() {
		if (_logarithmic == null) {
			double d = Math.log(_linear.doubleValue() / _min) / _logMaxDivMin;
			d = Math.max(d, Double.MIN_VALUE);
			_logarithmic = new Double(d);
		}
		return _logarithmic.doubleValue();
	}

	public double linear() {
		if (_linear == null) {
			double d = Math.exp(_logMaxDivMin * _logarithmic.doubleValue()) * _min;
			_linear = new Double(d);
		}
		return _linear.doubleValue();
	}

	public String toString() {
		return "linear: " + linear() + ",  logarithmic: " + logarithmic(); //$NON-NLS-1$ //$NON-NLS-2$
	}

	public static Frequency getNew() {
		return new Frequency(0.01, 10000);
	}
}