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Free Java Reporting Library
/*
* JasperReports - Free Java Reporting Library.
* Copyright (C) 2001 - 2022 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.fill;
import net.sf.jasperreports.engine.type.CalculationEnum;
/**
* @author Teodor Danciu ([email protected])
*/
public final class JRComparableIncrementerFactory extends JRAbstractExtendedIncrementerFactory
{
/**
*
*/
private static JRComparableIncrementerFactory mainInstance = new JRComparableIncrementerFactory();
/**
*
*/
private JRComparableIncrementerFactory()
{
}
/**
*
*/
public static JRComparableIncrementerFactory getInstance()
{
return mainInstance;
}
@Override
public JRExtendedIncrementer getExtendedIncrementer(CalculationEnum calculation)
{
JRExtendedIncrementer incrementer = null;
switch (calculation)
{
case LOWEST :
{
incrementer = JRComparableLowestIncrementer.getInstance();
break;
}
case HIGHEST :
{
incrementer = JRComparableHighestIncrementer.getInstance();
break;
}
case SYSTEM :
case NOTHING :
case COUNT :
case SUM :
case AVERAGE :
case STANDARD_DEVIATION :
case VARIANCE :
case FIRST :
case DISTINCT_COUNT :
default :
{
incrementer = JRDefaultIncrementerFactory.getInstance().getExtendedIncrementer(calculation);
break;
}
}
return incrementer;
}
}
/**
*
*/
final class JRComparableLowestIncrementer extends JRAbstractExtendedIncrementer
{
/**
*
*/
private static JRComparableLowestIncrementer mainInstance = new JRComparableLowestIncrementer();
/**
*
*/
private JRComparableLowestIncrementer()
{
}
/**
*
*/
public static JRComparableLowestIncrementer getInstance()
{
return mainInstance;
}
@Override
@SuppressWarnings({ "rawtypes", "unchecked" })
public Object increment(
JRCalculable variable,
Object expressionValue,
AbstractValueProvider valueProvider
)
{
Comparable value = (Comparable)variable.getIncrementedValue();
Comparable newValue = (Comparable)expressionValue;
if (
value != null && !variable.isInitialized() &&
(newValue == null || value.compareTo(newValue) < 0)
)
{
newValue = value;
}
return newValue;
}
@Override
public Object initialValue()
{
return null;
}
}
/**
*
*/
final class JRComparableHighestIncrementer extends JRAbstractExtendedIncrementer
{
/**
*
*/
private static JRComparableHighestIncrementer mainInstance = new JRComparableHighestIncrementer();
/**
*
*/
private JRComparableHighestIncrementer()
{
}
/**
*
*/
public static JRComparableHighestIncrementer getInstance()
{
return mainInstance;
}
@Override
@SuppressWarnings({ "rawtypes", "unchecked" })
public Object increment(
JRCalculable variable,
Object expressionValue,
AbstractValueProvider valueProvider
)
{
Comparable value = (Comparable)variable.getIncrementedValue();
Comparable newValue = (Comparable)expressionValue;
if (
value != null && !variable.isInitialized() &&
(newValue == null || value.compareTo(newValue) > 0)
)
{
newValue = value;
}
return newValue;
}
@Override
public Object initialValue()
{
return null;
}
}