org.jfree.report.expressions.sys
Class IsEmptyDataExpression

java.lang.Object
  extended by org.jfree.report.expressions.AbstractExpression
      extended by org.jfree.report.expressions.sys.IsEmptyDataExpression
All Implemented Interfaces:
java.io.Serializable, java.lang.Cloneable, Expression

public class IsEmptyDataExpression
extends AbstractExpression

Creation-Date: 31.01.2006, 18:55:09

Author:
Thomas Morgner
See Also:
Serialized Form

Constructor Summary
IsEmptyDataExpression()
           
 
Method Summary
 java.lang.Object computeValue()
          Return the current expression 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
 
Methods inherited from class java.lang.Object
equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
 

Constructor Detail

IsEmptyDataExpression

public IsEmptyDataExpression()
Method Detail

computeValue

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

The value depends (obviously) on the expression implementation.

Returns:
the value of the function.
Throws:
DataSourceException