org.jfree.report.function
Class ShowElementIfDataAvailableExpression

java.lang.Object
  |
  +--org.jfree.report.function.AbstractExpression
        |
        +--org.jfree.report.function.AbstractFunction
              |
              +--org.jfree.report.function.AbstractElementFormatFunction
                    |
                    +--org.jfree.report.function.ShowElementIfDataAvailableExpression

public class ShowElementIfDataAvailableExpression

extends AbstractElementFormatFunction

This functions checks the tablemodel and hides the named band, if there is no data available.

Author:

Thomas Morgner

See Also:

Serialized Form

Constructor Summary

ShowElementIfDataAvailableExpression()

Method Summary

java.lang.Object	getValue() Return the current expression value.
protected void	processRootBand(Band b)

Methods inherited from class org.jfree.report.function.AbstractElementFormatFunction

getElement, groupFinished, groupStarted, itemsAdvanced, pageCanceled, pageFinished, pageRolledBack, pageStarted, reportFinished, reportStarted, setElement

Methods inherited from class org.jfree.report.function.AbstractFunction

clone, itemsFinished, itemsStarted, reportDone, reportInitialized

Methods inherited from class org.jfree.report.function.AbstractExpression

getDataRow, getDependencyLevel, getInstance, getName, getReportConfiguration, getResourceBundleFactory, getRuntime, isActive, setActive, setDependencyLevel, setName, setRuntime

Methods inherited from class java.lang.Object

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

Constructor Detail

ShowElementIfDataAvailableExpression

public ShowElementIfDataAvailableExpression()

Method Detail

processRootBand

protected void processRootBand(Band b)

Overrides:

processRootBand in class AbstractElementFormatFunction

getValue

public java.lang.Object getValue()

Return the current expression value.

The value depends (obviously) on the expression implementation.

Returns:

the value of the function.