use of Rhino to parse the Javascript code

jackchang1

Hi

I want to develop a Java application to check the syntax of Javascript
code and I am thinking about using Rhino. But I don't know where to
start and there is no document for this. Has anybody done this before?
or can Rhino be embedded in my Java application to check the syntax of
JavaScript code? I thought it is possible.

Thanks!

Feb 27 '07 #1

Subscribe Reply

4584

Jeremy

ja********@gmai l.com wrote:

Hi

I want to develop a Java application to check the syntax of Javascript
code and I am thinking about using Rhino. But I don't know where to
start and there is no document for this. Has anybody done this before?
or can Rhino be embedded in my Java application to check the syntax of
JavaScript code? I thought it is possible.

Thanks!

Rhino can certainly be embedded into your application to run javascript
code. To just check syntax, it's really overkill. What you really want
to do is use a Javascript grammar to parse the code that you want to
check (you can probably find the grammar, or even the ready-made lexer
and parser, in the rhino package).

Your parser can then tell you if any errors were encountered during
parsing (indicating a syntax error).

Jeremy

Feb 27 '07 #2

jackchang1

On Feb 26, 6:10 pm, Jeremy <jer...@pinacol .comwrote:

jackcha...@gmai l.com wrote:
Hi

I want to develop a Java application to check the syntax of Javascript
code and I am thinking about using Rhino. But I don't know where to
start and there is no document for this. Has anybody done this before?
or can Rhino be embedded in my Java application to check the syntax of
JavaScript code? I thought it is possible.

Thanks!

Rhino can certainly be embedded into your application to run javascript
code. To just check syntax, it's really overkill. What you really want
to do is use a Javascript grammar to parse the code that you want to
check (you can probably find the grammar, or even the ready-made lexer
and parser, in the rhino package).

Your parser can then tell you if any errors were encountered during
parsing (indicating a syntax error).

Jeremy

thanks for your prompted reply!

yeah, that is what I am looking for. The class in Rhino that does the
grammer parsing so that I can reuse the class in my Java application.
But I didn't find this or its related document.

Feb 27 '07 #3

Duncan Booth

"ja********@gma il.com" <ja********@gma il.comwrote:

I want to develop a Java application to check the syntax of Javascript
code and I am thinking about using Rhino. But I don't know where to
start and there is no document for this. Has anybody done this before?
or can Rhino be embedded in my Java application to check the syntax of
JavaScript code? I thought it is possible.

Yes, it has been done before, but be warned that parsing Javascript is not
easy.

See www.jslint.com for Douglas Crockford's jslint program (or
http://codespeak.net/svn/kupu/trunk/kupu/jslint.js for my modified version
which has error messages that can be parsed by most editors, command line
arguments to suppress warnings, and works with either Rhino or Windows
CScript).

Feb 27 '07 #4

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