oracle.dacf.dataset
Interface Calculator

All Superinterfaces:

java.util.EventListener

public interface Calculator

extends java.util.EventListener

This interface defines the methods that must be implemented by a class that will perform calculations on column data. The class includes methods to provide data sources to the derived calculator and to remove the sources.

Method Summary

void	calculate(CalculatedAttributeInfo ca, javax.infobus.ImmediateAccess ia) Calculates the new value based upon the source values.
void	sourceAdded(ColumnInfo col) Adds a ColumnInfo to this Calculator as a source.
void	sourceRemoved(ColumnInfo col) Removes a ColumnInfo from this Calculator.

Method Detail

sourceAdded

public void sourceAdded(ColumnInfo col)

Adds a ColumnInfo to this Calculator as a source.

Parameters:

col - the ColumnInfo added as a value source.

sourceRemoved

public void sourceRemoved(ColumnInfo col)

Removes a ColumnInfo from this Calculator.

Parameters:

col - the ColumnInfo removed as a value source.

calculate

public void calculate(CalculatedAttributeInfo ca,
                      javax.infobus.ImmediateAccess ia)

Calculates the new value based upon the source values.

Parameters:

ca - the CalculatedAttributeInfo to be updated.

ia - the ImmediateAccess DataItem that contains the current value and stores the new value.