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Re: Invoking Tidy from Microsoft's JVM

From: Gary L Peskin <garyp@firstech.com>
Date: Thu, 10 May 2001 11:43:39 -0700
Message-ID: <3AFAE15B.1350A368@firstech.com>
To: Michael Goldberg <MGoldberg@yet2.com>
CC: "'html-tidy@w3.org'" <html-tidy@w3.org>
Hi, Michael --

I believe that subsequent reports of the IllegalAccessError have
revealed that the problem can be fixed simply by recompiling the code. 
The source is downloaded with the java version and there are not too
many .java files.

It seems like this had to do with some sort of compiler incompatibility
with the compiler that we used to create the .class files.  It should be
fixed for future releases but this should get you by for now.

HTH,
Gary

Michael Goldberg wrote:
> 
> All,
> 
> I could really use some help getting Tidy to run in our unusual environment.
> I am using Microsoft's Visual J++ (Version 6.0) on Windows NT.
> 
> The first problem I had was trying to "shell out", calling tidy.exe via
> Runtime.getRuntime().exec().  Unfortunately, when this statement is
> executed, the process which is created "hangs".  That is, on the subsequent
> waitFor() call, the process never returns.  Note that I have successfully
> used this technique to call other Windows executables.  At first, I thought
> that maybe the problem was in the parameters I was passing to tidy.exe.  For
> example, I thought that maybe the input filename was not being passed in
> correctly and that tidy was waiting for input via standard in.  That would
> certainly explain the hanging.  However, I have stepped through the debugger
> and I am confident I am passing the parameters correctly.
> 
> Next, I tried calling a batch file from Java, that in turn calls Tidy.
> Unfortunately, a similar problem occurs, but this time the batch file
> "hangs" at the place where Tidy is invoked.  Any ideas on why the process is
> hanging?  Any suggestions on how to get the process to complete?
> 
> For my third attempt to solve this problem, I downloaded JTidy.  I was
> encouraged to see that a java version of tidy existed and I could avoid the
> "shelling out" and hanging problems I was seeing above.  Unfortunately, when
> I try invoking the parse() method of the Tidy object, I get a
> java.lang.IllegalAccessError with the following stack trace:
> 
> java.lang.IllegalAccessError: org/w3c/tidy/ParserImpl: field _parseHead is
> inaccessible
>                 at org/w3c/tidy/ParserImpl$ParseHTML.parse (ParserImpl.java)
>         at org/w3c/tidy/ParserImpl.parseDocument (ParserImpl.java)
>                 at org/w3c/tidy/Tidy.parse (Tidy.java)
> 
> I did report the java.lang.IllegalAccessError error to this list back in
> December 2000, and Gary Peskin kindly responded.  He said that he had seen
> this error in Microsoft JVMs before.  Gary suggested I try turning off the
> jit, which I think I did, but I am not 100% sure.  I can't figure out if I
> have the Just In Time option set or not.  If I go to Tools->Options and
> select "Debugger".  The "Just-In-Time debugger" checkbox is checked.  I
> tried unselecting the checkbox, re-compiling, and re-running, but that did
> not help.  Next, I went to the Compiler tab of my project's properties and
> tried both -nojit and /nojit, but neither had an effect.  Interestingly, if
> I put in garbage for a compiler option, it still compiles with any error
> messages, so I'm not sure if I am doing this correctly.  I can't figure out
> how to configure J++ to show me the actual compile/run commands it uses, so
> I really can't confirm if I am using the jit option or not.  Does anyone
> have specific instructions on how to turn off the just-in-time compiler for
> Microsoft's J++ or how to configure it to display the compile and run
> commands?  Then again, I'm not even sure changing this setting will
> help-recall it was just a suggestion from Gary.  Does anyone know how to get
> around this java.lang.IllegalAccessError?
> 
> I have successfully used JTidy from Borland's JBuilder.  Thus, I am
> contemplating writing a tidy wrapper in JBuilder and trying to somehow call
> it from J++.  However, I'd rather solve one of the above problems before I
> head down this path, and I ask for your help.
> 
> Sincerely,
> Michael S. Goldberg
> mgoldberg@yet2.com
Received on Thursday, 10 May 2001 14:42:45 GMT

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