package org.openswing.swing.pivottable.functions.java;
import java.io.Serializable;
/**
* <p>Title: OpenSwing Framework</p>
* <p>Description: Function applied to a data field of a pivot table:
* it reports the max value in the collection of values that matches the row/column fields criteria.</p>
* <p>Copyright: Copyright (C) 2006 Mauro Carniel</p>
*
* <p> This file is part of OpenSwing Framework.
* This library is free software; you can redistribute it and/or
* modify it under the terms of the (LGPL) Lesser General Public
* License as published by the Free Software Foundation;
*
* GNU LESSER GENERAL PUBLIC LICENSE
* Version 2.1, February 1999
*
* 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
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the Free
* Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*
* The author may be contacted at:
* maurocarniel@tin.it</p>
*
* @author Mauro Carniel
* @version 1.0
*/
public class MaxFunction extends GenericFunction implements Serializable {
private Double maxValue;
public MaxFunction() {
}
public void processValue(Object value) {
if (maxValue==null) {
if (value!=null && value instanceof Number)
maxValue = new Double( ((Number)value).doubleValue());
}
else if (value!=null &&
value instanceof Number &&
((Number)value).doubleValue()>maxValue.doubleValue())
maxValue = new Double( ((Number)value).doubleValue() );
}
public Double getValue() {
return maxValue;
}
}