/*
* 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: JRFloatIncrementerFactory.java 3693 2010-04-06 14:43:13Z shertage $
*/
public final class JRFloatIncrementerFactory extends JRAbstractExtendedIncrementerFactory
{
/**
*
*/
protected static final Float ZERO = new Float(0);
/**
*
*/
private static JRFloatIncrementerFactory mainInstance = new JRFloatIncrementerFactory();
/**
*
*/
public JRFloatIncrementerFactory()
{
}
/**
*
*/
public static JRFloatIncrementerFactory 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 = JRFloatCountIncrementer.getInstance();
break;
}
case SUM :
{
incrementer = JRFloatSumIncrementer.getInstance();
break;
}
case AVERAGE :
{
incrementer = JRFloatAverageIncrementer.getInstance();
break;
}
case LOWEST :
case HIGHEST :
{
incrementer = JRComparableIncrementerFactory.getInstance().getExtendedIncrementer(calculation);
break;
}
case STANDARD_DEVIATION :
{
incrementer = JRFloatStandardDeviationIncrementer.getInstance();
break;
}
case VARIANCE :
{
incrementer = JRFloatVarianceIncrementer.getInstance();
break;
}
case DISTINCT_COUNT :
{
incrementer = JRFloatDistinctCountIncrementer.getInstance();
break;
}
case SYSTEM :
case NOTHING :
case FIRST :
default :
{
incrementer = JRDefaultIncrementerFactory.getInstance().getExtendedIncrementer(calculation);
break;
}
}
return incrementer;
}
}
/**
*
*/
final class JRFloatCountIncrementer extends JRAbstractExtendedIncrementer
{
/**
*
*/
private static JRFloatCountIncrementer mainInstance = new JRFloatCountIncrementer();
/**
*
*/
private JRFloatCountIncrementer()
{
}
/**
*
*/
public static JRFloatCountIncrementer getInstance()
{
return mainInstance;
}
/**
*
*/
public Object increment(
JRCalculable variable,
Object expressionValue,
AbstractValueProvider valueProvider
)
{
Number value = (Number)variable.getIncrementedValue();
if (value == null || variable.isInitialized())
{
value = JRFloatIncrementerFactory.ZERO;
}
if (expressionValue == null)
{
return value;
}
return new Float(value.floatValue() + 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 = JRFloatIncrementerFactory.ZERO;
}
if (combineValue == null)
{
return value;
}
return new Float(value.floatValue() + combineValue.floatValue());
}
public Object initialValue()
{
return JRFloatIncrementerFactory.ZERO;
}
}
/**
*
*/
final class JRFloatDistinctCountIncrementer extends JRAbstractExtendedIncrementer
{
/**
*
*/
private static JRFloatDistinctCountIncrementer mainInstance = new JRFloatDistinctCountIncrementer();
/**
*
*/
private JRFloatDistinctCountIncrementer()
{
}
/**
*
*/
public static JRFloatDistinctCountIncrementer 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 Float(holder.getCount());
}
public Object combine(JRCalculable calculable, JRCalculable calculableValue, AbstractValueProvider valueProvider)
{
DistinctCountHolder holder =
(DistinctCountHolder)valueProvider.getValue(calculable.getHelperVariable(JRCalculable.HELPER_COUNT));
return new Float(holder.getCount());
}
public Object initialValue()
{
return JRFloatIncrementerFactory.ZERO;
}
}
/**
*
*/
final class JRFloatSumIncrementer extends JRAbstractExtendedIncrementer
{
/**
*
*/
private static JRFloatSumIncrementer mainInstance = new JRFloatSumIncrementer();
/**
*
*/
private JRFloatSumIncrementer()
{
}
/**
*
*/
public static JRFloatSumIncrementer 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 = JRFloatIncrementerFactory.ZERO;
}
return new Float(value.floatValue() + newValue.floatValue());
}
public Object initialValue()
{
return JRFloatIncrementerFactory.ZERO;
}
}
/**
*
*/
final class JRFloatAverageIncrementer extends JRAbstractExtendedIncrementer
{
/**
*
*/
private static JRFloatAverageIncrementer mainInstance = new JRFloatAverageIncrementer();
/**
*
*/
private JRFloatAverageIncrementer()
{
}
/**
*
*/
public static JRFloatAverageIncrementer 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 Float(sumValue.floatValue() / countValue.floatValue());
}
public Object initialValue()
{
return JRFloatIncrementerFactory.ZERO;
}
}
/**
*
*/
final class JRFloatStandardDeviationIncrementer extends JRAbstractExtendedIncrementer
{
/**
*
*/
private static JRFloatStandardDeviationIncrementer mainInstance = new JRFloatStandardDeviationIncrementer();
/**
*
*/
private JRFloatStandardDeviationIncrementer()
{
}
/**
*
*/
public static JRFloatStandardDeviationIncrementer 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 Float( Math.sqrt(varianceValue.doubleValue()) );
}
public Object initialValue()
{
return JRFloatIncrementerFactory.ZERO;
}
}
/**
*
*/
final class JRFloatVarianceIncrementer extends JRAbstractExtendedIncrementer
{
/**
*
*/
private static JRFloatVarianceIncrementer mainInstance = new JRFloatVarianceIncrementer();
/**
*
*/
private JRFloatVarianceIncrementer()
{
}
/**
*
*/
public static JRFloatVarianceIncrementer 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 JRFloatIncrementerFactory.ZERO;
}
else
{
Number countValue = (Number)valueProvider.getValue(variable.getHelperVariable(JRCalculable.HELPER_COUNT));
Number sumValue = (Number)valueProvider.getValue(variable.getHelperVariable(JRCalculable.HELPER_SUM));
return
new Float(
(countValue.floatValue() - 1) * value.floatValue() / countValue.floatValue() +
( sumValue.floatValue() / countValue.floatValue() - newValue.floatValue() ) *
( sumValue.floatValue() / countValue.floatValue() - newValue.floatValue() ) /
(countValue.floatValue() - 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 Float(((Number) calculableValue.getIncrementedValue()).floatValue());
}
float v1 = value.floatValue();
float c1 = ((Number) valueProvider.getValue(calculable.getHelperVariable(JRCalculable.HELPER_COUNT))).floatValue();
float s1 = ((Number) valueProvider.getValue(calculable.getHelperVariable(JRCalculable.HELPER_SUM))).floatValue();
float v2 = ((Number) calculableValue.getIncrementedValue()).floatValue();
float c2 = ((Number) valueProvider.getValue(calculableValue.getHelperVariable(JRCalculable.HELPER_COUNT))).floatValue();
float s2 = ((Number) valueProvider.getValue(calculableValue.getHelperVariable(JRCalculable.HELPER_SUM))).floatValue();
c1 -= c2;
s1 -= s2;
float c = c1 + c2;
return new Float(
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 JRFloatIncrementerFactory.ZERO;
}
}