net.sf.reportengine.core.calc

Class MaxGroupCalculator

java.lang.Object

net.sf.reportengine.core.calc.AbstractGroupCalculator<BigDecimal,DefaultCalcIntermResult<BigDecimal>,Object>

net.sf.reportengine.core.calc.MaxGroupCalculator

All Implemented Interfaces:

GroupCalculator<BigDecimal,DefaultCalcIntermResult<BigDecimal>,Object>

public class MaxGroupCalculator
extends AbstractGroupCalculator<BigDecimal,DefaultCalcIntermResult<BigDecimal>,Object>

This is an universal max group calculator. It accepts as new values any object and tries to convert them to BigDecimal ( by new BigDecimal(object.toString())). The newly constructed BigDecimal is then compared to the previous max so that a new max is obtained.

Author:

dragos balan

Field Summary

Fields

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

Constructor Summary

Constructors

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

Method Summary

Modifier and Type	Method and Description
DefaultCalcIntermResult<BigDecimal>	compute(DefaultCalcIntermResult<BigDecimal> intermResult, Object newValue) checks whether the new value is lower than the previous result
DefaultCalcIntermResult<BigDecimal>	init() returns a BigDecimal based on Double.MIN_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

MaxGroupCalculator

public MaxGroupCalculator()

builds this group calculator with the default label

MaxGroupCalculator

public MaxGroupCalculator(String label)

builds this group calculator with a custom label

Parameters:

label - the label

Method Detail

init

public DefaultCalcIntermResult<BigDecimal> init()

returns a BigDecimal based on Double.MIN_VALUE

Returns:

the initial value of the intermediate result

compute

public DefaultCalcIntermResult<BigDecimal> compute(DefaultCalcIntermResult<BigDecimal> intermResult,
                                                   Object newValue)

checks whether the new value is lower than the previous result

Parameters:

intermResult - the previous intermediate result ( it's the 10 in my example)

newValue - the current value (it's the "whatever text" in my example above)

Returns: