JRFloatIncrementerFactory.java
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net.sf.jasperreports.engine.fill |
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/*
* ============================================================================
* GNU Lesser General Public License
* ============================================================================
*
* JasperReports - Free Java report-generating library.
* Copyright (C) 2001-2006 JasperSoft Corporation http://www.jaspersoft.com
*
* This library 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 2.1 of the License, or (at your option) any later version.
*
* 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA.
*
* JasperSoft Corporation
* 303 Second Street, Suite 450 North
* San Francisco, CA 94107
* http://www.jaspersoft.com
*/
package net.sf.jasperreports.engine.fill;
import net.sf.jasperreports.engine.JRVariable;
/**
* @author Teodor Danciu (teodord@users.sourceforge.net)
* @version $Id: JRFloatIncrementerFactory.java 1347 2006-07-19 12:31:07Z teodord $
*/
public 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;
}
/**
*
*/
public JRExtendedIncrementer getExtendedIncrementer(byte calculation)
{
JRExtendedIncrementer incrementer = null;
switch (calculation)
{
case JRVariable.CALCULATION_COUNT :
{
incrementer = JRFloatCountIncrementer.getInstance();
break;
}
case JRVariable.CALCULATION_SUM :
{
incrementer = JRFloatSumIncrementer.getInstance();
break;
}
case JRVariable.CALCULATION_AVERAGE :
{
incrementer = JRFloatAverageIncrementer.getInstance();
break;
}
case JRVariable.CALCULATION_LOWEST :
case JRVariable.CALCULATION_HIGHEST :
{
incrementer = JRComparableIncrementerFactory.getInstance().getExtendedIncrementer(calculation);
break;
}
case JRVariable.CALCULATION_STANDARD_DEVIATION :
{
incrementer = JRFloatStandardDeviationIncrementer.getInstance();
break;
}
case JRVariable.CALCULATION_VARIANCE :
{
incrementer = JRFloatVarianceIncrementer.getInstance();
break;
}
case JRVariable.CALCULATION_DISTINCT_COUNT :
{
incrementer = JRFloatDistinctCountIncrementer.getInstance();
break;
}
case JRVariable.CALCULATION_SYSTEM :
case JRVariable.CALCULATION_NOTHING :
case JRVariable.CALCULATION_FIRST :
default :
{
incrementer = JRDefaultIncrementerFactory.getInstance().getExtendedIncrementer(calculation);
break;
}
}
return incrementer;
}
}
/**
*
*/
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;
}
}
/**
*
*/
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;
}
}
/**
*
*/
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;
}
}
/**
*
*/
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;
}
}
/**
*
*/
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;
}
}
/**
*
*/
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;
}
}
The table below shows all metrics for JRFloatIncrementerFactory.java.




