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Posted to dev@ant.apache.org by Jay Glanville <di...@nortelnetworks.com> on 2000/08/09 18:38:47 UTC
Bug in DirectoryScanner.scandir?
I've just recently started testing the Ant make tool that is part of the
Jakarta project. It looks very promising. However, I think I've come
across a little bug.
The file in question is org.apache.tools.ant.DirectoryScanner and the method
is scandir. The first two lines go something like this:
String[] newfiles = dir.list();
for (int i = 0; i < newfiles.length; i++) {
I've been getting a null pointer exception in this method. I believe that
dir.list() can actually return a null if the directory to be listed is
empty? This is the case in my department's development tree (designers have
created the directories, but haven't actually submitted the code for it
yet).
A possible solution would be to place the following line:
if ( newfiles == null ) return;
in between the two above lines. Does this solve the situation? It seems to
have solved mine.
If this question has asked already, apologies, but I've just joined this
group.
----------------------------------------------------------------------------
-----
Jay Dickon Glanville
P066 - SiteManager Development
613-765-1144 (ESN 395-1144)
MS: 045/55/A05
E-Mail: dickon@nortelnetworks.com
RE: Bug in DirectoryScanner.scandir?
Posted by Conor MacNeill <co...@cortexebusiness.com.au>.
Jay,
according to the JDK javadoc, you get an empty array for an empty directory.
You get null when
"Returns null if this abstract pathname does not denote a directory, or if
an I/O error occurs."
So perhaps it should be a BuildException.
Conor
--
Conor MacNeill
conor@cortexebusiness.com.au
Cortex eBusiness
http://www.cortexebusiness.com.au
> -----Original Message-----
> From: Jay Glanville [mailto:dickon@nortelnetworks.com]
> Sent: Thursday, 10 August 2000 2:39
> To: ant-dev@jakarta.apache.org
> Subject: Bug in DirectoryScanner.scandir?
>
>
> I've just recently started testing the Ant make tool that is part of the
> Jakarta project. It looks very promising. However, I think I've come
> across a little bug.
>
> The file in question is org.apache.tools.ant.DirectoryScanner and
> the method
> is scandir. The first two lines go something like this:
> String[] newfiles = dir.list();
> for (int i = 0; i < newfiles.length; i++) {
> I've been getting a null pointer exception in this method. I believe that
> dir.list() can actually return a null if the directory to be listed is
> empty? This is the case in my department's development tree
> (designers have
> created the directories, but haven't actually submitted the code for it
> yet).
>
> A possible solution would be to place the following line:
> if ( newfiles == null ) return;
> in between the two above lines. Does this solve the situation?
> It seems to
> have solved mine.
>
> If this question has asked already, apologies, but I've just joined this
> group.
>
> ------------------------------------------------------------------
> ----------
> -----
> Jay Dickon Glanville
> P066 - SiteManager Development
> 613-765-1144 (ESN 395-1144)
> MS: 045/55/A05
> E-Mail: dickon@nortelnetworks.com
>
>