Calls to getName() on conditional styles always return null.

Hi,

 

What you are trying to do is not quite correct.

Conditional style have a meaning only at report design time and not in the generated report (JasperPrint object).

 

It is true that our engine preserves style objects when the JasperPrint object is generated and indeed those styles coming from the report design continue to have conditional styles in them. But those are like dead objects which do not count in the styling of the JasperPrint content.

Modifying a conditional style inside a JasperPrint object has no effect whatsoever.

 

From a report design point of view, the name of a conditional style is irrelevant and sometimes it is confusing. This is why recently we have put some warnings when the JRXML file is parsed, to let the users know that some attributes in the conditional style tag are not used by the engine and should not be present.

 

See:

 

http://jasperforge.org/projects/jasperreports/tracker/view.php?id=4660

 

What you need to understand is that conditional styles contribute to the creation of some consolidated style names, depending on which conditions apply at runtime. You can look into the JasperPrint object and see some styles that have calculated names ending with 1 (one) and 0 (zero), depending on which conditions where met when the conditional styles were evaluated at runtime. It is those consolidated styles that you probably want to look for in the JasperPrint and modify using the API.

 

I hope this helps.

Teodor

Thanks for the help Teodor, I will try out your suggestion.

 

For reference, my original approach was based on the recommendation here:

 

http://jasperforge.org/plugins/espforum/view.php?group_id=102&forumid=103&topicid=20716

Hi,

 

In that forum thread, the discussion was about conditional styles in the source JRXML. But in this tracker here, you showed us you are actually looking for them in the generated JasperPrint object. Which is a different thing, as explained above.

 

I wonder if looking for conditional styles by their known index is not something you could do.

 

I'm closing this for now. Feel free to reopen it if you have new information about this.

 

Thank you,

Teodor