OPath ported for Java object model

I have been thinking about alternate uses of OPath I created for EVars plug-in. And it occurred to me that I can very well use it for my unit testing (which involves pretty complex insurance object model) and for things like JSPs where I really hate to write ten lines of Java code just to display some value.

So I wrote a port of OPath for Java object model (less than 200 lines of real code). Following example should explain how it can add some value to your development efforts:

Consider an example of code for simple Accessible Swing Table :


If you are writing a UI test to see specific table's column heading, you just write following

Collection<Object> findAll = OPathReflectiveInterpreter.findAll(frame, "//dataModel//@val\\$column.*");
assertEquals("First Name",((Object[])findAll.toArray()[0])[0]);

This is very trivial test, of course. But it is sufficient to express the power of OPath micro-scripting.

If you like to try it out for unit-testing or templating check-out the download here (You will also need opath.jar).

Disclaimer: This is experimental work at best, it might be slow and it might have bugs at this time.

EVars Update

Based on the awesome feedback, I have been doing some offline development on EVars plug-in lately. I have added some basic documentation on wiki. Installation is now easy, let P2 do the work to install/update the plug-in (it's a struggle to host update-site with google code).

One of the most exciting feature (Which I can't stop talking about) is value based filtering. Now you can have all the powers of predicate expression, how about searching a map like map//key['@user.*']/.. to select entries matching regular expression user.* ? This update also includes support for relational operators so you can search exactly you want like this //value[count > n] .

I have uploaded OPath grammar for the language enthusiasts (left factored, left recursion free). One feedback was 'experiencing some unresponsive behavior for huge graphs' I have addressed that to some extent by integrating progress monitoring and asynchronous interpretation job.

Thanks for the feedback! Also, for those at EclipseCon have fun with your sessions!