/*
* JasperReports - Free Java Reporting Library.
* Copyright (C) 2001 - 2009 Jaspersoft Corporation. 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 <http://www.gnu.org/licenses/>.
*/
package net.sf.jasperreports.engine.fill;
import net.sf.jasperreports.engine.type.CalculationEnum;
/**
* @author Teodor Danciu (teodord@users.sourceforge.net)
* @version $Id: JRDoubleIncrementerFactory.java 3693 2010-04-06 14:43:13Z shertage $
*/
public final class JRDoubleIncrementerFactory extends JRAbstractExtendedIncrementerFactory
{
/**
*
*/
protected static final Double ZERO = new Double(0);
/**
*
*/
private static JRDoubleIncrementerFactory mainInstance = new JRDoubleIncrementerFactory();
/**
*
*/
private JRDoubleIncrementerFactory()
{
}
/**
*
*/
public static JRDoubleIncrementerFactory getInstance()
{
return mainInstance;
}
/**
* @deprecated Replaced by {@link #getExtendedIncrementer(CalculationEnum)}
*/
public JRExtendedIncrementer getExtendedIncrementer(byte calculation)
{
return getExtendedIncrementer(CalculationEnum.getByValue(calculation));
}
/**
*
*/
public JRExtendedIncrementer getExtendedIncrementer(CalculationEnum calculation)
{
JRExtendedIncrementer incrementer = null;
switch (calculation)
{
case COUNT :
{
incrementer = JRDoubleCountIncrementer.getInstance();
break;
}
case SUM :
{
incrementer = JRDoubleSumIncrementer.getInstance();
break;
}
case AVERAGE :
{
incrementer = JRDoubleAverageIncrementer.getInstance();
break;
}
case LOWEST :
case HIGHEST :
{
incrementer = JRComparableIncrementerFactory.getInstance().getExtendedIncrementer(calculation);
break;
}
case STANDARD_DEVIATION :
{
incrementer = JRDoubleStandardDeviationIncrementer.getInstance();
break;
}
case VARIANCE :
{
incrementer = JRDoubleVarianceIncrementer.getInstance();
break;
}
case DISTINCT_COUNT :
{
incrementer = JRDoubleDistinctCountIncrementer.getInstance();
break;
}
case SYSTEM :
case NOTHING :
case FIRST :
default :
{
incrementer = JRDefaultIncrementerFactory.getInstance().getExtendedIncrementer(calculation);
break;
}
}
return incrementer;
}
}
/**
*
*/
final class JRDoubleCountIncrementer extends JRAbstractExtendedIncrementer
{
/**
*
*/
private static JRDoubleCountIncrementer mainInstance = new JRDoubleCountIncrementer();
/**
*
*/
private JRDoubleCountIncrementer()
{
}
/**
*
*/
public static JRDoubleCountIncrementer getInstance()
{
return mainInstance;
}
/**
*
*/
public Object increment(
JRCalculable variable,
Object expressionValue,
AbstractValueProvider valueProvider
)
{
Number value = (Number)variable.getIncrementedValue();
if (value == null || variable.isInitialized())
{
value = JRDoubleIncrementerFactory.ZERO;
}
if (expressionValue == null)
{
return value;
}
return new Double(value.doubleValue() + 1);
}
public Object combine(JRCalculable calculable, JRCalculable calculableValue, AbstractValueProvider valueProvider)
{
Number value = (Number)calculable.getIncrementedValue();
Number combineValue = (Number) calculableValue.getValue();
if (value == null || calculable.isInitialized())
{
value = JRDoubleIncrementerFactory.ZERO;
}
if (combineValue == null)
{
return value;
}
return new Double(value.doubleValue() + combineValue.doubleValue());
}
public Object initialValue()
{
return JRDoubleIncrementerFactory.ZERO;
}
}
/**
*
*/
final class JRDoubleDistinctCountIncrementer extends JRAbstractExtendedIncrementer
{
/**
*
*/
private static JRDoubleDistinctCountIncrementer mainInstance = new JRDoubleDistinctCountIncrementer();
/**
*
*/
private JRDoubleDistinctCountIncrementer()
{
}
/**
*
*/
public static JRDoubleDistinctCountIncrementer getInstance()
{
return mainInstance;
}
/**
*
*/
public Object increment(
JRCalculable variable,
Object expressionValue,
AbstractValueProvider valueProvider
)
{
DistinctCountHolder holder =
(DistinctCountHolder)valueProvider.getValue(variable.getHelperVariable(JRCalculable.HELPER_COUNT));
if (variable.isInitialized())
{
holder.init();
}
return new Double(holder.getCount());
}
public Object combine(JRCalculable calculable, JRCalculable calculableValue, AbstractValueProvider valueProvider)
{
DistinctCountHolder holder =
(DistinctCountHolder)valueProvider.getValue(calculable.getHelperVariable(JRCalculable.HELPER_COUNT));
return new Double(holder.getCount());
}
public Object initialValue()
{
return JRDoubleIncrementerFactory.ZERO;
}
}
/**
*
*/
final class JRDoubleSumIncrementer extends JRAbstractExtendedIncrementer
{
/**
*
*/
private static JRDoubleSumIncrementer mainInstance = new JRDoubleSumIncrementer();
/**
*
*/
private JRDoubleSumIncrementer()
{
}
/**
*
*/
public static JRDoubleSumIncrementer getInstance()
{
return mainInstance;
}
/**
*
*/
public Object increment(
JRCalculable variable,
Object expressionValue,
AbstractValueProvider valueProvider
)
{
Number value = (Number)variable.getIncrementedValue();
Number newValue = (Number)expressionValue;
if (newValue == null)
{
if (variable.isInitialized())
{
return null;
}
return value;
}
if (value == null || variable.isInitialized())
{
value = JRDoubleIncrementerFactory.ZERO;
}
return new Double(value.doubleValue() + newValue.doubleValue());
}
public Object initialValue()
{
return JRDoubleIncrementerFactory.ZERO;
}
}
/**
*
*/
final class JRDoubleAverageIncrementer extends JRAbstractExtendedIncrementer
{
/**
*
*/
private static JRDoubleAverageIncrementer mainInstance = new JRDoubleAverageIncrementer();
/**
*
*/
private JRDoubleAverageIncrementer()
{
}
/**
*
*/
public static JRDoubleAverageIncrementer getInstance()
{
return mainInstance;
}
/**
*
*/
public Object increment(
JRCalculable variable,
Object expressionValue,
AbstractValueProvider valueProvider
)
{
if (expressionValue == null)
{
if (variable.isInitialized())
{
return null;
}
return variable.getValue();
}
Number countValue = (Number)valueProvider.getValue(variable.getHelperVariable(JRCalculable.HELPER_COUNT));
Number sumValue = (Number)valueProvider.getValue(variable.getHelperVariable(JRCalculable.HELPER_SUM));
return new Double(sumValue.doubleValue() / countValue.doubleValue());
}
public Object initialValue()
{
return JRDoubleIncrementerFactory.ZERO;
}
}
/**
*
*/
final class JRDoubleStandardDeviationIncrementer extends JRAbstractExtendedIncrementer
{
/**
*
*/
private static JRDoubleStandardDeviationIncrementer mainInstance = new JRDoubleStandardDeviationIncrementer();
/**
*
*/
private JRDoubleStandardDeviationIncrementer()
{
}
/**
*
*/
public static JRDoubleStandardDeviationIncrementer getInstance()
{
return mainInstance;
}
/**
*
*/
public Object increment(
JRCalculable variable,
Object expressionValue,
AbstractValueProvider valueProvider
)
{
if (expressionValue == null)
{
if (variable.isInitialized())
{
return null;
}
return variable.getValue();
}
Number varianceValue = (Number)valueProvider.getValue(variable.getHelperVariable(JRCalculable.HELPER_VARIANCE));
return new Double( Math.sqrt(varianceValue.doubleValue()) );
}
public Object initialValue()
{
return JRDoubleIncrementerFactory.ZERO;
}
}
/**
*
*/
final class JRDoubleVarianceIncrementer extends JRAbstractExtendedIncrementer
{
/**
*
*/
private static JRDoubleVarianceIncrementer mainInstance = new JRDoubleVarianceIncrementer();
/**
*
*/
private JRDoubleVarianceIncrementer()
{
}
/**
*
*/
public static JRDoubleVarianceIncrementer getInstance()
{
return mainInstance;
}
/**
*
*/
public Object increment(
JRCalculable variable,
Object expressionValue,
AbstractValueProvider valueProvider
)
{
Number value = (Number)variable.getIncrementedValue();
Number newValue = (Number)expressionValue;
if (newValue == null)
{
if (variable.isInitialized())
{
return null;
}
return value;
}
else if (value == null || variable.isInitialized())
{
return JRDoubleIncrementerFactory.ZERO;
}
else
{
Number countValue = (Number)valueProvider.getValue(variable.getHelperVariable(JRCalculable.HELPER_COUNT));
Number sumValue = (Number)valueProvider.getValue(variable.getHelperVariable(JRCalculable.HELPER_SUM));
return
new Double(
(countValue.doubleValue() - 1) * value.doubleValue() / countValue.doubleValue() +
( sumValue.doubleValue() / countValue.doubleValue() - newValue.doubleValue() ) *
( sumValue.doubleValue() / countValue.doubleValue() - newValue.doubleValue() ) /
(countValue.doubleValue() - 1)
);
}
}
public Object combine(JRCalculable calculable, JRCalculable calculableValue, AbstractValueProvider valueProvider)
{
Number value = (Number)calculable.getIncrementedValue();
if (calculableValue.getValue() == null)
{
if (calculable.isInitialized())
{
return null;
}
return value;
}
else if (value == null || calculable.isInitialized())
{
return new Double(((Number) calculableValue.getIncrementedValue()).doubleValue());
}
double v1 = value.doubleValue();
double c1 = ((Number) valueProvider.getValue(calculable.getHelperVariable(JRCalculable.HELPER_COUNT))).doubleValue();
double s1 = ((Number) valueProvider.getValue(calculable.getHelperVariable(JRCalculable.HELPER_SUM))).doubleValue();
double v2 = ((Number) calculableValue.getIncrementedValue()).doubleValue();
double c2 = ((Number) valueProvider.getValue(calculableValue.getHelperVariable(JRCalculable.HELPER_COUNT))).doubleValue();
double s2 = ((Number) valueProvider.getValue(calculableValue.getHelperVariable(JRCalculable.HELPER_SUM))).doubleValue();
c1 -= c2;
s1 -= s2;
double c = c1 + c2;
return new Double(
c1 / c * v1 +
c2 / c * v2 +
c2 / c1 * s1 / c * s1 / c +
c1 / c2 * s2 / c * s2 / c -
2 * s1 / c * s2 /c
);
}
public Object initialValue()
{
return JRDoubleIncrementerFactory.ZERO;
}
}