net.sf.jasperreports.engine.util.DisplayComparableValue Maven / Gradle / Ivy
/*
* JasperReports - Free Java Reporting Library.
* Copyright (C) 2001 - 2016 TIBCO Software Inc. All rights reserved.
* http://www.jaspersoft.com
*
* Unless you have purchased a commercial license agreement from Jaspersoft,
* the following license terms apply:
*
* This program is part of JasperReports.
*
* JasperReports 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 3 of the License, or
* (at your option) any later version.
*
* JasperReports 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 JasperReports. If not, see .
*/
package net.sf.jasperreports.engine.util;
import net.sf.jasperreports.engine.JRConstants;
/**
* @author Lucian Chirita ([email protected])
*/
public class DisplayComparableValue> extends DisplayValue
implements Comparable>
{
private static final long serialVersionUID = JRConstants.SERIAL_VERSION_UID;
public DisplayComparableValue(T key, String label)
{
super(key, label);
}
@Override
public int compareTo(DisplayComparableValue o)
{
T otherKey = o.key;
// considering nulls greater than non null values
int order;
if (key == null)
{
if (otherKey == null)
{
order = 0;
}
else
{
order = -1;
}
}
else
{
if (otherKey == null)
{
order = 1;
}
else
{
order = key.compareTo(otherKey);
}
}
return order;
}
}