Generic file name validation code?

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harry - 02 Sep 2007 12:15 GMT

I need to validate a file name but it has to work on Windows & Unix!

Does anybody know of java code that does this?

thanks in advance

harry

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Roedy Green - 02 Sep 2007 12:40 GMT

>Does anybody know of java code that does this?

If you limited the name to A-Z a-z 0-9 . it would work on anything
without a tight length limit anything.

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Roedy Green Canadian Mind Products
The Java Glossary
http://mindprod.com

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harryajh - 02 Sep 2007 12:57 GMT

> >Does anybody know of java code that does this?
>
[quoted text clipped - 3 lines]
> Roedy Green Canadian Mind Products
> The Java Glossaryhttp://mindprod.com

Thanks Roedy, this seems to do the job (forgot to say file name must
end with "con")

Pattern p = Pattern.compile("([A-Z]|[a-z]|[0-9])+.con");

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Arne Vajhøj - 02 Sep 2007 15:14 GMT

>>> Does anybody know of java code that does this?
>> If you limited the name to A-Z a-z 0-9 . it would work on anything
[quoted text clipped - 4 lines]
>
> Pattern p = Pattern.compile("([A-Z]|[a-z]|[0-9])+.con");

That can be abbreviated to:

Pattern p = Pattern.compile("([A-Za-z0-9])+.con");

Arne

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Eric Sosman - 02 Sep 2007 15:40 GMT

>>> On Sun, 02 Sep 2007 11:15:34 GMT, "harry" <a...@abc.com> wrote,
>>> quoted or
[quoted text clipped - 11 lines]
>
> Pattern p = Pattern.compile("([A-Za-z0-9])+.con");

Better quote that . character ... Also, the ( ) can be
eliminated if the O.P. doesn't need the capturing group.

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Eric Sosman
esosman@ieee-dot-org.invalid

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Arne Vajhøj - 02 Sep 2007 21:49 GMT

>> > Pattern p = Pattern.compile("([A-Z]|[a-z]|[0-9])+.con");
>>
[quoted text clipped - 3 lines]
>
> Better quote that . character ...

Yes.

Arne

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Stefan Ram - 02 Sep 2007 19:57 GMT

>>Does anybody know of java code that does this?
>If you limited the name to A-Z a-z 0-9 . it would work on anything
>without a tight length limit anything.

The library »ram.jar« contains code to convert any
Unicode-Text (including surrogate pairs) into a text
consisting only of uppercase letters and numbers
that can be used as a file name under most
file systems as long as it is short enough.

public final class Main
{ public static void main( final String[] args )
{
final java.lang.String text =
"¿Aren't Kafka's Schloß and Æsops oeuvres often naïve?";

final java.lang.String product =
de.dclj.ram.notation.filode.Text.sourceText( text );

java.lang.System.out.println( product ); }}

XBFZYARENXNTXGYKAFKAXNSXGYSCHLOXDFZXGANDXGXC6ZSOPSXGOEUVRESXGOFTENXGNAXEFZVEXK

The encoding used is called »Filode« and being described
on the Filode homepage

http://www.purl.org/stefan_ram/pub/filode

The ram.jar homepage:

http://www.purl.org/stefan_ram/pub/ram-jar

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Generic file name validation code?

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