I have not investigated this at all so I am relying on your findings
below.
If a 7zip provider can be written that has a dependency on a 7zip jar
and that jar is licensed under the LGPL then this is permitted under
current policy. We would simply need to notify legal-discuss that we
intend to add 7zip as an optional component to VFS. Since the
providers are all pretty much optional components there really is no
problem with that. The dependent jar cannot reside within Apache's
SVN, but this is not a problem since VFS uses Maven - assuming, of
course, that the jar is available in a maven repository.
The pom.xml for VFS would need to list the dependencies as optional,
but we are already doing that for some of the providers to limit the
amount of baggage that is brought in.
If you create the provider, provide unit tests as well as instructions
for using it I would be happy to look at it and get the necessary
permission from legal.
Ralph
On Jan 29, 2009, at 2:12 PM, Ramon Buckland wrote:
Hi Feras,
I am not a developer for commons-vfs but have the following comments
for
you.
You are free to use commons-vfs in accordance with the Apache
License under
which it is distributed.
In general this means a fair bit. See here for details on the license.
http://www.apache.org/foundation/licence-FAQ.html
What this means is you can, if you want to, write a new provider for
commons-vfs, however commons-vfs may not be able to incorporate it
into the
core due to license restrictions between a 3rd party library and the
apache
license.
In particular, this details what license could be compatible with
Apache's
http://www.apache.org/legal/3party.html
Now to specifics on 7zip. Jzip it seems is a GUI tool, i had a
ferret around
and can see that 7zip actually provides an SDK for java for 7zip.
I notice that most of 7zip is licensed under LGPL. And the SDK seems
to be
marked as "in the public domain".
If you were to use the 7zip SDK to add a File provider support to
commons-vfs you would
(a) not be able to distribute it with the commons-vfs is the code
from 7zip
you use is LGPL.; or
(b) if it is only "public domain" software, you would need to
investigate if
it is compatible with Apache's.
I suspect it is (a). Others can comment.
By all means, this does not stop you from doing the work, you using
it, and
also distruibuting the provider on your or some other website not
affliated
with commons-vfs.
hope that helps
Ramon
On Fri, Jan 30, 2009 at 05:36, feras ahmed <[email protected]> wrote:
Hello...
I would like to ask if I can add a new File Provider For 7zip file
format,
as I trying to access files inside 7zip.
I am using J7zip so is there an example or way to do this or any
other ways
to do that.
Thanks ...
Best Wishes
Feras
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