org.jfree.report.expressions.sys

Class IsEmptyExpression

Implemented Interfaces:
Cloneable, Expression, Serializable

public class IsEmptyExpression
extends AbstractExpression

Creation-Date: 27.01.2006, 20:42:19
Author:
Thomas Morgner

Constructor Summary

IsEmptyExpression()

Method Summary

Object
computeValue()
Return the current expression value.
Object
getValue()
void
setValue(Object value)

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

clone, getDataRow, getInstance, getName, getParentLocale, getReportConfiguration, getResourceBundleFactory, getRuntime, isDeepTraversing, isPrecompute, isPreserve, setDeepTraversing, setName, setPrecompute, setPreserve, setRuntime

Constructor Details

IsEmptyExpression

public IsEmptyExpression()

Method Details

computeValue

public Object computeValue()
            throws DataSourceException
Return the current expression value.

The value depends (obviously) on the expression implementation.

Specified by:
computeValue in interface Expression
Returns:
the value of the function.

getValue

public Object getValue()

setValue

public void setValue(Object value)