Get all variables of javascript in JAVA

Question

I am using rhino and Scripting for the Java Platform in order to allow the user extend my application.

However the user can write some cases eg (ASTO.value>440) || (ASTO.bellowNormal) etc... The problem is that before running the script from my JAVA application using ScriptEngine i want to get the names of all the variables! Because i should know which variables are required for the script to run... I know that a regular expression would do the job but i amnt sure... Please i somebody could help me figure out the java regexp to get the variables i would really appriciate it..

Sounds like you want to implement the Alien Autopsy antipattern: forums.sun.com/thread.jspa?messageID=10337966#10337966 — Joachim Sauer
– Joachim Sauer, Commented Apr 12, 2010 at 16:09
Why do you think that regex is the only solution? Are other solutions allowed? — BalusC
– BalusC, Commented Apr 12, 2010 at 16:14

GorillaApe · Accepted Answer · 2010-04-12 19:39:02Z

0

I found a solution cx.getDebuggableView(result).getParamAndVarCount() But it doesnt return undeclared variables:(

answered Apr 12, 2010 at 19:39

GorillaApe

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Community · Accepted Answer · 2017-05-23 11:55:31Z

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We're doing something very similar although it is written in Scala and I can only give you some hints...

Tests are really important
This is one of our more complex tests: listArg[Math.floor(4 / listArg[zeroArg]['f3'])]

Variables that describe the design...

// chars after which there may be an environment variable used
private val NewScopeChars = List('[', '(', '/', '*', '+', '-', ',')
// chars that signal the end of a variable name
private val SepChars = '.' :: ' ' :: ';' :: ']' :: ')' :: NewScopeChars
private val ExcludeStrings = List("new", "Math")
private val LiteralPrefixes = "'" :: "\"" :: (0 to 9).map(_.toString).toList

I'm having a problem with performance so any help would be appreciated.

edited May 23, 2017 at 11:55

CommunityBot

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answered Dec 21, 2011 at 23:31

Peter L

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Doua Beri · Accepted Answer · 2013-10-23 11:57:22Z

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a little late but you might be interested in this: http://ramkulkarni.com/blog/understanding-ast-created-by-mozilla-rhino-parser/

answered Oct 23, 2013 at 11:57

Doua Beri

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