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Is there any plan to implement advanced expression editor for JavaScript expressions?

I'm working on a big project where we deliver some REST API which is used by our client applications and/or Jaspersoft Studio. So far I've been working on custom Query Executor adapter with some custom query language. Everything is fine as long as you are a programmer with some good knowledge of our API. Now we want to go one step further. I'm thinking of providing something similar to Cassandra Connection or MongoDB Connection data adapters. Later I want to add support for our query language in the Dataset and Query Dialog. 

I found only one page describing development of Jaspersoft Studio. I kind of figured out that I need to create a new plugin. I will have to do some reverse engineering on existing data adapters. My question is, if there exist more documentation on extending Jaspersoft Studio? Is there somebody else who is working on a similar solution?

It should be enough to update the ecj library then. Maybe try one version higher than the one which comes with Jasper.

It seems that you include Jasper library differently than I do. In my case Maven is doing all dependency resolving, and that is why I need to have pom.xml in the root directory of my project. Are you using Maven? Or did you just downloaded Jasper and included it in your lib directly?

This is the only change I did. It was made in our main pom.xml file. We are using Maven.

I tried simple update of eclipse jdt lirbary and it seems to be working. <dependency> <groupId>net.sf.jasperreports</groupId> <artifactId>jasperreports</artifactId> <version>5.6.1</version> <exclusions> <exclusion> <groupId>eclipse</groupId> <artifactId>jdtcore</artifactId> </exclusion> </exclusions> </dependency> <dependency> <groupId>org.eclipse.jdt.core.compiler</groupId> <artifactId>ecj</artifactId> <version>4.4</version> </dependency>[/code]

I can't compile tempaltes with JRJdtCompiler because jdtcore:3.1.0 does not support java 8. Caused by: net.sf.jasperreports.engine.JRException: Errors were encountered when compiling report expressions class file:1. The type java.lang.CharSequence cannot be resolved. It is indirectly referenced from required .class files[/code]I can't use JRJdk13Compiler, cause it can't compile templates which use functions. symbol: method DATEFORMAT(Date,String) location: class report_1414506137290_237400/Users/Mariusz/Work/coresuite-cloud/dataCloud/report_1414506137290_237400.java:255: error: cannot find symbol value = DATEFORMAT(((...[/code]I know Java 8 is not yet supported, but is there some workaround? If not, is there some ETA? I wouldn't like to implement my own JRCompiler.