How to use BIRT variables ?

Hello. I am trying to use Report Variable for transfer something values of code in elements of ".rptdesign" (not report parametrs). Value of variable does not change, but report runs and displays and in console i not find errors or exceptions. 
 
Part of the code that is responsible for the variables: 
<pre class='_prettyXprint _lang-auto _linenums:0'>
RunAndRenderTask task = (RunAndRenderTask) engine.createRunAndRenderTask(design);
IReportContext reportContext = task.getReportContext();
reportContext.setPersistentGlobalVariable("VarOne", "something text");
</pre>
Also, i tried to use another methods: setGlobalVariable and setPageVariable (i changed type of variable if i used second variant). 
 
How i am doing it in ".rptdesign" : 
 
<a class='bbc_url' href='http://www.radikal.ru'><img src='http://i052.radikal.ru/1302/5c/a381cc8de082.jpg' alt='Posted Image' class='bbc_img' /></a> 
 
 
 
Maybe i should something to write in script code? Sorry, maybe it's stupid problem, but i tried to find documentation and answers on forums, but did not find anything.

Find more posts tagged with

Comments

CBR

The variables you see there are special variables that can be used to output on master page. You can set them via script in report using setVariable for Report variables and setPageVariable for page variables. It is kind of complex to explain for what they can be used exactly. If you are interested let my know and i ll try to. Nevertheless neither Page nor Report variables will solve your problem because they are not intended to bring values from java to your report.

The easiest thing for you to do is to use the appContext. The appContext is a java.util.HashMap<String, Object>. It also contains a few BIRT specific config values so do not overwrite it in your Java code. But feel free to also add your specific config values or values that you want to output in your reports.

In Java:
RunAndRenderTask task = (RunAndRenderTask) engine.createRunAndRenderTask(design);
task.getAppContext().put("myValue", "My special text");
task.run()...

then in report:
reportContext.getAppContext().get("myValue");

CBR

In addition:
The funny thing about the appContext is that it is working in both directions:
It can also bring values from your report back to your java code:

In report:
reportContext.getAppContext().put("myVar", "This is a value coming from BIRT report");

In java:
RunAndRenderTask task = (RunAndRenderTask) engine.createRunAndRenderTask(design);
task.run()
//after task.run but before task.close
task.getAppContext().get("myVar");
task.close();

Artemy

AppContext helped! Thank you! As I understood, the variables needed for specific solutions?

CBR

Glad that it solved your problem.

The variables that you tried to use are often understood as global variables. This is not correct. The variables section enables users to create special variables that can be used on master pages (header and footer on every page of your report). Actuate added them because it is not possible to output data dependend text on the master page.
You can read here about these type of variables: http://www.eclipse.org/birt/phoenix/project/notable2.5.php#jump_4