net.sf.reportengine.core.calc

Class LastGroupCalculator<T>

java.lang.Object

net.sf.reportengine.core.calc.AbstractGroupCalculator<T,DefaultCalcIntermResult<T>,T>

net.sf.reportengine.core.calc.LastGroupCalculator<T>

All Implemented Interfaces:

GroupCalculator<T,DefaultCalcIntermResult<T>,T>

public class LastGroupCalculator<T>
extends AbstractGroupCalculator<T,DefaultCalcIntermResult<T>,T>

This group calculator always stores the last value passed to the compute(DefaultCalcIntermResult, Object) method

Author:

dragos balan

Field Summary

Fields

Modifier and Type	Field and Description
static String	LABEL the default label

Constructor Summary

Constructors

Constructor and Description
LastGroupCalculator() builds this group calculator with the default label
LastGroupCalculator(String label) builds this group calculator with the custom label

Method Summary

Modifier and Type	Method and Description
DefaultCalcIntermResult<T>	compute(DefaultCalcIntermResult<T> intermResult, T newValue) stores the last value passes to this method as @param newValue
DefaultCalcIntermResult<T>	init() returns an empty intermediate calculator result ( empty means that it contains a null value)

Methods inherited from class net.sf.reportengine.core.calc.AbstractGroupCalculator

getLabel

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

LABEL

public static final String LABEL

the default label

See Also:

Constant Field Values

Constructor Detail

LastGroupCalculator

public LastGroupCalculator()

builds this group calculator with the default label

LastGroupCalculator

public LastGroupCalculator(String label)

builds this group calculator with the custom label

Parameters:

label - the label

Method Detail

init

public DefaultCalcIntermResult<T> init()

returns an empty intermediate calculator result ( empty means that it contains a null value)

Returns:

the initial value of the intermediate result

compute

public DefaultCalcIntermResult<T> compute(DefaultCalcIntermResult<T> intermResult,
                                          T newValue)

stores the last value passes to this method as @param newValue

Parameters:

intermResult - the previous result

newValue - the new value

Returns: