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org.apache.cocoon.forms.formmodel.algorithms
Class AbstractBaseAlgorithm

java.lang.Object
  org.apache.cocoon.forms.formmodel.algorithms.AbstractBaseAlgorithm

All Implemented Interfaces:

Contextualizable, LogEnabled, CalculatedFieldAlgorithm

Direct Known Subclasses:

SimpleFormula

public abstract class AbstractBaseAlgorithm
extends Object
implements CalculatedFieldAlgorithm, LogEnabled, Contextualizable

Abstract base class for algorithms.

This class implements the getTriggerWidgets method and holds the triggers list. It also implements Contextualizable and LogEnabled to give the algorithms access to the cocoon's ObjectModel and Loggers.

Version:

$Id: AbstractBaseAlgorithm.html 1304258 2012-03-23 10:09:27Z ilgrosso $

Field Summary

protected List

triggers

Constructor Summary

AbstractBaseAlgorithm()

Method Summary

void	addTrigger(String widget)
void	clearTriggers()
void	contextualize(Context context)
void	enableLogging(Logger logger)
protected Context	getContext()
protected Logger	getLogger()
Iterator	getTriggerWidgets() Returns an iterator on trigger widget paths.

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.apache.cocoon.forms.formmodel.CalculatedFieldAlgorithm

calculate, isSuitableFor

Field Detail

triggers

protected List triggers

Constructor Detail

AbstractBaseAlgorithm

public AbstractBaseAlgorithm()

Method Detail

getTriggerWidgets

public Iterator getTriggerWidgets()

Description copied from interface: CalculatedFieldAlgorithm

Returns an iterator on trigger widget paths. When the value of a trigger widget changes, then the CalculatedField value must be recalculated.

Specified by:

getTriggerWidgets in interface CalculatedFieldAlgorithm

Returns:

An iterator of Strings representing widget paths as interpreted by WidgetFinder.

addTrigger

public void addTrigger(String widget)

enableLogging

public void enableLogging(Logger logger)

Specified by:

enableLogging in interface LogEnabled

getLogger

protected Logger getLogger()

contextualize

public void contextualize(Context context)
                   throws ContextException

Specified by:

contextualize in interface Contextualizable

Throws:

ContextException

getContext

protected Context getContext()

clearTriggers

public void clearTriggers()