Follow Techotopia on Twitter

On-line Guides
All Guides
eBook Store
iOS / Android
Linux for Beginners
Office Productivity
Linux Installation
Linux Security
Linux Utilities
Linux Virtualization
Linux Kernel
System/Network Admin
Programming
Scripting Languages
Development Tools
Web Development
GUI Toolkits/Desktop
Databases
Mail Systems
openSolaris
Eclipse Documentation
Techotopia.com
Virtuatopia.com
Answertopia.com

How To Guides
Virtualization
General System Admin
Linux Security
Linux Filesystems
Web Servers
Graphics & Desktop
PC Hardware
Windows
Problem Solutions
Privacy Policy

  




 

 

Eclipse BIRT Report Developer Guide
Previous Page Home Next Page

Previous Next

Using named expressions

A named expression calculates a value using JavaScript for use in a Java or JavaScript event handler. A named expression provides straightforward access to the result of a calculation to event handlers in either language. These expressions provide access to JavaScript functions, such as BirtDateTime, to Java code.

You create the named expression on an element. The expression that you define provides the default value for the name. Event handler code in onPrepare can modify this expression definition. The BIRT framework evaluates the expression after OnPrepare runs and before onCreate runs. Code in onCreate and onRender can access the value of the evaluated expression. For example, a named expression called DaysPastDue has the following expression:

You access the named expression in an event handler using code similar to the following line:

 


(c) Copyright Actuate Corporation 2009

 
 
  Published under the terms of the Eclipse Public License Version 1.0 ("EPL") Design by Interspire