You are very much welcome to contribute.

> We are ready to contribute the following:
> ·         - Support for more than 256 columns,

Is it for the binary (.xls) format ?

For which format. XSSF supports 16K

> ·         - Performances improvements,

This kind of improvements is always welcome.

> ·         - ....

Support for wildcards in formula parsing / evalution would be a nice
contribution.
POI's formula module is well designed and it should be possible to add
support for wildcards without changing much code.
Support for simple wildcards e.g. ”*apples*” is straightforward and
should take a few days. You will need to re-visit formula
implementations and make sure they understand the wildcard syntax.

Support for complex wildcards like ”*”&A1&”*” is harder. It will
require changes in the formula parser to support this syntax and then
changes in the evaluation code. We may need to re-factor some core
classes to suport it.

A full-time developer familiar with the POI architecture should be
able to complete this task in 7-10 days . The point is that POI is a
volunteer project and people contribute in their free time, mostly off
hours, by little bits.

Regards,
Yegor

On Wed, Feb 13, 2013 at 8:53 PM, Cedric Walter
<[email protected]> wrote:
> Innoveo is using Apache POI since 2007, and this library is strategic for us 
> in order to support the Excel support in our product Skyetm 
> (http://www.innoveo.com/SoftwareSolution.aspx), we want now to contribute bug 
> fixes and feature enhancements we have already made and will have to make in 
> the future back to Apache POI.
>
> We are ready to contribute the following:
> ·         - Support for more than 256 columns,
> ·         - Performances improvements,
> ·         - ....
>
> We need now that Apache POI support "wildcards values" for vlookup, hlookup, 
> lookup, match, countif and sumif in the NEXT 2 to 4 WEEKS.
>
> Innoveo is committed to develop this functionality but we would still 
> appreciate some guidance, so the chance the patch get accepted being higher. 
> A lot of questions are popping up:
> - Can it be done?
> - Estimates if it would be done by an internal developer, best efforts?
> - Difficulty, is the internal API able to tackle this requirement without 
> requiring us to changes most of code?
> - Would some internal developers being interested by a bounty to develop this 
> functionality?
>
> Apache POI Roadmap as far as we did understand is driven by the bugtracker, 
> is there any plan to support "wildcards values" or has it be already done?
>
> INSIGHT INNOVEO /
>
> A growing software company focused on the insurance industry, based in 
> Zurich, Switzerland and privately held by its founding members. We base 
> ourselves on long experience in the insurance industry, technology and 
> architecture (SOA).
> Our international, very experienced team, is acting throughout Europe and 
> beyond. We deliver an industry-specific IT platform and related services; we 
> are focused on the Western European insurance market. Innoveo is dedicated to 
> enabling the insurance business through technology. Starting in 2000, we have 
> rapidly built an industry-reference platform that handles € billions in offer 
> volume today and serves as the basis for a wide variety of business 
> applications.
> see http://www.innoveo.com/AboutUs.aspx";

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