Parsing and replacing Javascript identifiers with Rhino in Java

Posted by Parhs on Stack Overflow See other posts from Stack Overflow or by Parhs
Published on 2010-04-19T01:06:25Z Indexed on 2010/04/19 1:43 UTC
Read the original article Hit count: 279

Filed under:

rhino

|

JavaScript

|

java

Suppose I let the user to write a condition using Javascript, the user can write conditions to perform a test and return true or false. E.g.:

INS>5 || ASTO.valueBetween(10,210)

I want to find which variables are used in the script that the user wrote. I tried to find a way to get the identifier names in Java. The Rhino library didn't help a lot. However I found that via handling exceptions I could get all the identifiers. So this problem is solved.

So everything is great, but there is one little problem. How can I replace these identifiers with a numeric identifier? E.g. INS should be _234 and ASTO should be _331.

INS and ASTO etc are entities in my database. I want to replace them, because the name may change. I could do it using a replace but this isn't easy because:

It should be reversible. E.g. ASTO to _234 and _234 to ASTO again.
Replacing _23 with MPLAH may also replace _234. This could be fixed with regexp somehow.
What if _23 is in a comment section? Rare to happen, but possible /* _23 fdsafd ktl */. It should also be replaced.
What if it is a name of a function? E.g. _32() {}. Also rare, but it shouldn't be replaced.
What if it is enclosed in "" or ''?

I am sure that there are a lot more cases. Any ideas?

© Stack Overflow or respective owner

Related posts about rhino

Rhino Commons and Rhino Mocks Reference Documents?

as seen on Stack Overflow - Search for 'Stack Overflow'
Ok, is it just me, or does there seem to be a lack of (easy to find) reference documentation for Rhino Commons and Rhino Mocks? My coworkers have started using Rhino Mocks and Rhino Commons (particularly the NHibernate stuff), and I found a few tutorial-ish examples, which were good. But when I… >>> More
Unit Test For NpgsqlCommand With Rhino Mocks

as seen on Stack Overflow - Search for 'Stack Overflow'
My unit test keeps getting the following error: "System.InvalidOperationException: The Connection is not open." The Test [TestFixture] public class Test { [Test] public void Test1() { NpgsqlConnection connection = MockRepository.GenerateStub<NpgsqlConnection>(); … >>> More
Rhino Mocks, Dependency Injection, and Separation of Concerns

as seen on Stack Overflow - Search for 'Stack Overflow'
I am new to mocking and dependency injection and need some guidance. My application is using a typical N-Tier architecture where the BLL references the DAL, and the UI references the BLL but not the DAL. Pretty straight forward. Lets say, for example, I have the following classes: class MyDataAccess… >>> More
How to use the Rhino javascript engine in an applet

as seen on Stack Overflow - Search for 'Stack Overflow'
For my java program I'm using Rhino to execute JS scripts. Now I'm trying to convert it to an applet which works great, except that everytime it's calling evaluateString(...) the JVM throws an AccessControlException. After some (a lot) of research I found out that this is caused by Rhino's custom… >>> More
How can I test blades in MVC Turbine with Rhino Mocks?

as seen on Stack Overflow - Search for 'Stack Overflow'
I'm trying to set up blade unit tests in an MVC Turbine-derived site. The problem is that I can't seem to mock the IServiceLocator interface without hitting the following exception: System.BadImageFormatException: An attempt was made to load a program with an incorrect format. (Exception from HRESULT:… >>> More

Related posts about JavaScript

CHAT ROOMs 7 by 6

as seen on Stack Overflow - Search for 'Stack Overflow'
I am looking for chatroom on one page with 7 loggedin users and 6+rows for say 42 users.these users will keep on adding wthnew users.Need urgent help.A PRETTY UNUSUAL Q FOR MOST OF U.What is MORE REQ new features: Usernames are unique to users currently chatting You can see a "currently chatting"… >>> More
Integrating JavaScript Unit Tests with Visual Studio

as seen on Stephen Walter - Search for 'Stephen Walter'
Modern ASP.NET web applications take full advantage of client-side JavaScript to provide better interactivity and responsiveness. If you are building an ASP.NET application in the right way, you quickly end up with lots and lots of JavaScript code. When writing server code, you should be writing… >>> More
Has Javascript developed beyond what it was originally designed to do?

as seen on Programmers - Search for 'Programmers'
I've been talking with a friend about the purpose of Javascript, when and how it should be used, etc. He quoted that: JavaScript was designed to add interactivity to HTML pages [...] JavaScript gives HTML designers a programming tool HTML authors are normally not programmers… >>> More
PHP, javascript, single quote problems with IE when passing variable from ajax post to javascript fu

as seen on Stack Overflow - Search for 'Stack Overflow'
Hi! I have been trying to get this to work for a while, and I suspect there's an easy solution that I just can't find. My head feels like jelly and I would really appreciate any help. My main page.php makes a .post() to backend.php and fetches a list of cities which it echoes in the form of: <li… >>> More
Javascript in XSL that is loaded by Javascript

as seen on Stack Overflow - Search for 'Stack Overflow'
Is there anyway to have javascript run when a XSL sheet has been applied to an XML file by Javascript? I am using a JQuery plugin to apply the sheet to the xml but the javascript that is located inside of the XSL file will not run. I put the Javascript at the bottom of the file and it still does… >>> More