is it possible to build a debugger around the java scripting engine? [closed]

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we are using the java 6 scripting engine in our product, and now we are thinking on adding some debugging abilities.

my question is:

1. is it possible? does the java 6 scripting engine has the same capabilities like rhino as far as debugging.
2. some documentation about how to start doing it, some code samples any information would be great since i could not find anything on the web.

thanks

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I'd start by looking at how the open source Firebug (www.getfirebug.com) tool is implemented, unless you're completely wedded to the idea of a "pure" sand-boxed Rhino environment (and even then Firebug could probably teach you a few things).