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Java Source Code / Java Documentation » Report » jasperreports 2.0.1 » net.sf.jasperreports.engine.fill

Source Cross Reference

Class Diagram

Java Document (Java Doc)

net.sf.jasperreports.engine.fill .JRExtendedIncrementer

All known Subclasses:   net.sf.jasperreports.engine.fill .JRAbstractExtendedIncrementer,
JRExtendedIncrementer
public interface JRExtendedIncrementer extends JRIncrementer(Code)
Extended incrementer interface.
The net.sf.jasperreports.engine.fill.JRIncrementer JRIncrementer has been kept for backward compatibility.
The crosstab calculation engine requires extended incrementers. An incrementer implementing net.sf.jasperreports.engine.fill.JRIncrementer JRIncrementer can be used for report variables only.
author:
   Lucian Chirita (lucianc@users.sourceforge.net)
version:
   $Id: JRExtendedIncrementer.java 1229 2006-04-19 10:27:35Z teodord $

Method Summary
public Object combine(JRCalculable calculable, JRCalculable calculableValue, AbstractValueProvider valueProvider)
     Combines two calculated values into one.
public Object increment(JRCalculable calculable, Object expressionValue, AbstractValueProvider valueProvider)
     Increments a calculable object with a value.
public Object initialValue()
     Returns the initial value for this calculation.
This method should return a neutral value for this calculation (e.g.

Method Detail
combine
public Object combine(JRCalculable calculable, JRCalculable calculableValue, AbstractValueProvider valueProvider) throws JRException(Code)
Combines two calculated values into one.
Parameters:
  calculable - the first calculated value
Parameters:
  calculableValue - the second calculated value
Parameters:
  valueProvider - the value provider used for the helper variables the combined value
throws:
  JRException -

increment
public Object increment(JRCalculable calculable, Object expressionValue, AbstractValueProvider valueProvider) throws JRException(Code)
Increments a calculable object with a value.
Parameters:
  calculable - the calculable
Parameters:
  expressionValue - the value
Parameters:
  valueProvider - value provider the incremented value
throws:
  JRException -

initialValue
public Object initialValue()(Code)
Returns the initial value for this calculation.
This method should return a neutral value for this calculation (e.g. 0 for sum, 1 for product, etc) or a default value if no neutral value exists. the initial value for this calculation

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