net.sf.jasperreports.engine.fill
Class JRAbstractExtendedIncrementer

java.lang.Object
  net.sf.jasperreports.engine.fill.JRAbstractExtendedIncrementer

All Implemented Interfaces:

JRExtendedIncrementer, JRIncrementer

public abstract class JRAbstractExtendedIncrementer
extends Object
implements JRExtendedIncrementer

Base class for extended incrementers.

Version:

$Id: JRAbstractExtendedIncrementer.java 5180 2012-03-29 13:23:12Z teodord $

Author:

Lucian Chirita (lucianc@users.sourceforge.net)

Constructor Summary

JRAbstractExtendedIncrementer()

Method Summary

Object	combine(JRCalculable calculable, JRCalculable calculableValue, AbstractValueProvider valueProvider) This implementation calls increment(calculable, calculableValue.getValue(), valueProvider).
boolean	ignoresNullValues() This implementation returns true.
Object	increment(JRFillVariable variable, Object expressionValue, AbstractValueProvider valueProvider) This implementation simply calls increment(JRCalculable, Object, AbstractValueProvider).

Methods inherited from class java.lang.Object

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

Methods inherited from interface net.sf.jasperreports.engine.fill.JRExtendedIncrementer

increment, initialValue

Constructor Detail

JRAbstractExtendedIncrementer

public JRAbstractExtendedIncrementer()

Method Detail

increment

public Object increment(JRFillVariable variable,
                        Object expressionValue,
                        AbstractValueProvider valueProvider)
                 throws JRException

This implementation simply calls increment(JRCalculable, Object, AbstractValueProvider).

Specified by:

increment in interface JRIncrementer

Throws:

JRException

combine

public Object combine(JRCalculable calculable,
                      JRCalculable calculableValue,
                      AbstractValueProvider valueProvider)
               throws JRException

This implementation calls increment(calculable, calculableValue.getValue(), valueProvider).

Specified by:

combine in interface JRExtendedIncrementer

Parameters:

calculable - the first calculated value

calculableValue - the second calculated value

valueProvider - the value provider used for the helper variables

Returns:

the combined value

Throws:

JRException

ignoresNullValues

public boolean ignoresNullValues()

This implementation returns true. Incrementer implementations can override this to specify that null values should not be ignored.

Specified by:

ignoresNullValues in interface JRExtendedIncrementer

Returns:

whether null values are ignored by this incrementer