Oops. You're right and the doc says it should work. A bug, I guess...
(feeling a bit foolish)
Chris
-----Original Message-----
From: Shishir K. Singh [mailto:[EMAIL PROTECTED]
Sent: Monday, June 23, 2003 10:17 AM
To: [EMAIL PROTECTED]
Subject: RE: org.apache.xerces.utils.regex help
Hmmm.. ".*?" is a non greedy match. If I do ".*", I think it matches the
whole and then retraces back. Putting the "?" prevents that and forces it to
match from left to right..at least in Perl, that is how it works. I guess the
same would apply to Java. Therefore the performance is better when using .*?
than just using ".*"
Shishir
-----Original Message-----
From: Christopher Ebert [mailto:[EMAIL PROTECTED]
Sent: Monday, June 23, 2003 1:06 PM
To: [EMAIL PROTECTED]
Subject: RE: org.apache.xerces.utils.regex help
Hi,
.*? seems a little strange to me as a construct -- .* is 'zero or more
occurances of any character', no? And a ? means zero or one occurrence. So I
think you may have confused the regex library (and one recovers differently
than the other). I think you'll find "^(\\w+)\\s*=\\s*(.*)\\;$" works as well.
Chris
-----Original Message-----
From: Shishir K. Singh [mailto:[EMAIL PROTECTED]
Sent: Monday, June 23, 2003 8:57 AM
To: [EMAIL PROTECTED]
Subject: RE: org.apache.xerces.utils.regex help
Follow up on my own question:
If I use the following expression, I get the desired result:
RegularExpression re = new RegularExpression("^(\\w+)\\s*?=\\s*?(.*?)\\;$");
Why is it that using (.*?) twice is not producing the desired result ? Is this
a bug or a feature ?
TIA
Shishir
> -----Original Message-----
> From: Shishir K. Singh
> Sent: Monday, June 23, 2003 10:41 AM
> To: '[EMAIL PROTECTED]'
> Subject: org.apache.xerces.utils.regex help
>
> Hi,
>
>
> My intent is to parse the property file like
>
> AAAAAA = BBBBBBB;
> XXXXXX = "YYYYYY";
>
> I am using the following expression which works fine with the
> java.util.regex package Java 1.4 (I have to do the same on Java 1.3).
>
> RegularExpression re = new
> RegularExpression("^(.*?)\\s*?=\\s*?(.*?)\\;$");
> Match mat = new Match();
> boolean m = re.matches(line,md);
>
> I want to get to the two group to get the key/value pair.
>
> The return value of m is false.
>
> Is there something wrong with the expression ?
>
>
>
> TIA
> Shishir
>
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