You are viewing a plain text version of this content. The canonical link for it is here.
Posted to user@poi.apache.org by "Andrew C. Oliver" <ac...@buni.org> on 2007/03/21 20:59:04 UTC
Re: POI-Ruby
Why?
Why not just compile with GCJ and then wrap that?
Seems weird to go 3 techs deep...
Also there are C utils for OLE and XLS. Check out open office and
gnumeric...use those...doesn't make sense to use C->Ruby->POI
Jeff Swensen wrote:
> I am attempting to write my own C wrapper for the POI Ruby bindings and
> am looking for some guidance. I compiled poi4r using the swig wrapper
> only to result in a segfault which I'm unable to track down. It also
> seems that swig generates a lot of unnecessary bloat while creating the
> wrapper, which is why I decided to try to replace it with my own version
> (also partly due to some feedback from my boss who seems to dislike swig
> quite a bit).
>
> Are there any resources you could point me to for writing the ruby
> interface? I understand that at the most basic level I need to define
> all of the Java classes and public methods, but after that I'm at a
> loss. I've tried googling but I can't find any examples of writing a c
> extension to wrap compiled java for ruby.
>
> Thanks,
> Jeff
>
>
> ---------------------------------------------------------------------
> To unsubscribe, e-mail: poi-user-unsubscribe@jakarta.apache.org
> Mailing List: http://jakarta.apache.org/site/mail2.html#poi
> The Apache Jakarta Poi Project: http://jakarta.apache.org/poi/
>
--
>From Windows/Exchange to Linux/Meldware
Buni Meldware Communication Suite
Email, Calendaring, ease of configuration/administration
http://buni.org
---------------------------------------------------------------------
To unsubscribe, e-mail: poi-user-unsubscribe@jakarta.apache.org
Mailing List: http://jakarta.apache.org/site/mail2.html#poi
The Apache Jakarta Poi Project: http://jakarta.apache.org/poi/
Re: POI-Ruby
Posted by Jeff Swensen <je...@merrillcorp.com>.
My mistake, I'm using 1.3.31.
Jeff Swensen wrote:
> Thanks for the responses.
>
> Avik,
>
> What version of SWIG has worked the best for you? The version installed
> here is 1.1 (patch 5). I see that is the most recent stable release.
>
> Thanks,
> Jeff
>
> Avik Sengupta wrote:
>
>> Jeff
>>
>> You can certainly wrap stuff on your own, but I would figure it will be a lot
>> of work, which is reason I started on swig. I wouldnt start on it unless you
>> either have a lot of time, or some significant experience writing C
>> extensions for ruby (neither of which is true for me)
>>
>> You'l have to declare the function signatures to call from ruby, convert
>> objects (eg ruby strings to gcj string objects) and handle memory allocation
>> and de-allocation on either side. Both ruby and java being garbage collected,
>> not only will you have to worry about leaks, but also premature collection.
>>
>> http://www.rubycentral.com/book/ext_ruby.html has the basics. You've
>> probably already seen this.
>>
>> With swig, you still have to worry about all this, but a lot of the
>> boilerplate is generated. For eg, you'll have to write the object wrapping
>> code once, and not worry about calling it every time an object is referenced.
>>
>> As for segfaults, the whole thing, i've found, is quite sensitive to swig
>> version. Maybe you can try with an older swig version?
>>
>> Regards
>> -
>> Avik
>>
>>
>>
>>
>>
>>
>> On Thursday 22 Mar 2007 3:03:11 am Andrew C. Oliver wrote:
>>
>>
>>> Okay from Ruby on Linux...yes POI-ruby is probably your best option
>>>
>>> I thought you were doing from C on Linux.... Hopefully Avik is around
>>> and he can help... I'll ping him if he doesn't answer.
>>>
>>> Jeff Swensen wrote:
>>>
>>>
>>>> I might be stating my intention incorrectly. I have the relevant bits
>>>> from poi-ruby compiled with gcj, and am attempting to wrap that myself
>>>> instead of using SWIG.
>>>>
>>>> As far as open office and gnumeric, I have been unable to find a fully
>>>> featured discrete library for writing XLS files from ruby on linux.
>>>> Would be most appreciative if you could point me to one.
>>>>
>>>> Andrew C. Oliver wrote:
>>>>
>>>>
>>>>> Why?
>>>>> Why not just compile with GCJ and then wrap that?
>>>>>
>>>>> Seems weird to go 3 techs deep...
>>>>>
>>>>> Also there are C utils for OLE and XLS. Check out open office and
>>>>> gnumeric...use those...doesn't make sense to use C->Ruby->POI
>>>>>
>>>>> Jeff Swensen wrote:
>>>>>
>>>>>
>>>>>> I am attempting to write my own C wrapper for the POI Ruby bindings and
>>>>>> am looking for some guidance. I compiled poi4r using the swig wrapper
>>>>>> only to result in a segfault which I'm unable to track down. It also
>>>>>> seems that swig generates a lot of unnecessary bloat while creating the
>>>>>> wrapper, which is why I decided to try to replace it with my own
>>>>>> version (also partly due to some feedback from my boss who seems to
>>>>>> dislike swig quite a bit).
>>>>>>
>>>>>> Are there any resources you could point me to for writing the ruby
>>>>>> interface? I understand that at the most basic level I need to define
>>>>>> all of the Java classes and public methods, but after that I'm at a
>>>>>> loss. I've tried googling but I can't find any examples of writing a c
>>>>>> extension to wrap compiled java for ruby.
>>>>>>
>>>>>> Thanks,
>>>>>> Jeff
>>>>>>
>>>>>>
>>>>>> ---------------------------------------------------------------------
>>>>>> To unsubscribe, e-mail: poi-user-unsubscribe@jakarta.apache.org
>>>>>> Mailing List: http://jakarta.apache.org/site/mail2.html#poi
>>>>>> The Apache Jakarta Poi Project: http://jakarta.apache.org/poi/
>>>>>>
>>>>>>
>>>> ---------------------------------------------------------------------
>>>> To unsubscribe, e-mail: poi-user-unsubscribe@jakarta.apache.org
>>>> Mailing List: http://jakarta.apache.org/site/mail2.html#poi
>>>> The Apache Jakarta Poi Project: http://jakarta.apache.org/poi/
>>>>
>>>>
>>
>> ---------------------------------------------------------------------
>> To unsubscribe, e-mail: poi-user-unsubscribe@jakarta.apache.org
>> Mailing List: http://jakarta.apache.org/site/mail2.html#poi
>> The Apache Jakarta Poi Project: http://jakarta.apache.org/poi/
>>
>>
>>
>
>
--
Jeffery S. Swensen
Software Engineer
Merrill Lextranet
Legal Computer Solutions, Inc.
107 Union Wharf
Boston, MA 02109
t. 617-227-4469 x234
jeff.swensen@merrillcorp.com
THE INFORMATION IN THIS MESSAGE IS INTENDED ONLY FOR THE PERSONAL AND CONFIDENTIAL USE OF THE DESIGNATED RECIPIENTS NAMED ABOVE AND MAY CONTAIN LEGALLY PRIVILEGED INFORMATION. If the reader of this message is not the intended recipient or an agent responsible for delivering it to the intended recipient, you are hereby notified that you have received this document in error, and that any review, dissemination, distribution or copying of this message is strictly prohibited. If you have received this communication in error, please notify us immediately by telephone at 617-227-4469 Ext. 200. Thank you.
---------------------------------------------------------------------
To unsubscribe, e-mail: poi-user-unsubscribe@jakarta.apache.org
Mailing List: http://jakarta.apache.org/site/mail2.html#poi
The Apache Jakarta Poi Project: http://jakarta.apache.org/poi/
Re: POI-Ruby
Posted by Jeff Swensen <je...@merrillcorp.com>.
Thanks for the responses.
Avik,
What version of SWIG has worked the best for you? The version installed
here is 1.1 (patch 5). I see that is the most recent stable release.
Thanks,
Jeff
Avik Sengupta wrote:
> Jeff
>
> You can certainly wrap stuff on your own, but I would figure it will be a lot
> of work, which is reason I started on swig. I wouldnt start on it unless you
> either have a lot of time, or some significant experience writing C
> extensions for ruby (neither of which is true for me)
>
> You'l have to declare the function signatures to call from ruby, convert
> objects (eg ruby strings to gcj string objects) and handle memory allocation
> and de-allocation on either side. Both ruby and java being garbage collected,
> not only will you have to worry about leaks, but also premature collection.
>
> http://www.rubycentral.com/book/ext_ruby.html has the basics. You've
> probably already seen this.
>
> With swig, you still have to worry about all this, but a lot of the
> boilerplate is generated. For eg, you'll have to write the object wrapping
> code once, and not worry about calling it every time an object is referenced.
>
> As for segfaults, the whole thing, i've found, is quite sensitive to swig
> version. Maybe you can try with an older swig version?
>
> Regards
> -
> Avik
>
>
>
>
>
>
> On Thursday 22 Mar 2007 3:03:11 am Andrew C. Oliver wrote:
>
>> Okay from Ruby on Linux...yes POI-ruby is probably your best option
>>
>> I thought you were doing from C on Linux.... Hopefully Avik is around
>> and he can help... I'll ping him if he doesn't answer.
>>
>> Jeff Swensen wrote:
>>
>>> I might be stating my intention incorrectly. I have the relevant bits
>>> from poi-ruby compiled with gcj, and am attempting to wrap that myself
>>> instead of using SWIG.
>>>
>>> As far as open office and gnumeric, I have been unable to find a fully
>>> featured discrete library for writing XLS files from ruby on linux.
>>> Would be most appreciative if you could point me to one.
>>>
>>> Andrew C. Oliver wrote:
>>>
>>>> Why?
>>>> Why not just compile with GCJ and then wrap that?
>>>>
>>>> Seems weird to go 3 techs deep...
>>>>
>>>> Also there are C utils for OLE and XLS. Check out open office and
>>>> gnumeric...use those...doesn't make sense to use C->Ruby->POI
>>>>
>>>> Jeff Swensen wrote:
>>>>
>>>>> I am attempting to write my own C wrapper for the POI Ruby bindings and
>>>>> am looking for some guidance. I compiled poi4r using the swig wrapper
>>>>> only to result in a segfault which I'm unable to track down. It also
>>>>> seems that swig generates a lot of unnecessary bloat while creating the
>>>>> wrapper, which is why I decided to try to replace it with my own
>>>>> version (also partly due to some feedback from my boss who seems to
>>>>> dislike swig quite a bit).
>>>>>
>>>>> Are there any resources you could point me to for writing the ruby
>>>>> interface? I understand that at the most basic level I need to define
>>>>> all of the Java classes and public methods, but after that I'm at a
>>>>> loss. I've tried googling but I can't find any examples of writing a c
>>>>> extension to wrap compiled java for ruby.
>>>>>
>>>>> Thanks,
>>>>> Jeff
>>>>>
>>>>>
>>>>> ---------------------------------------------------------------------
>>>>> To unsubscribe, e-mail: poi-user-unsubscribe@jakarta.apache.org
>>>>> Mailing List: http://jakarta.apache.org/site/mail2.html#poi
>>>>> The Apache Jakarta Poi Project: http://jakarta.apache.org/poi/
>>>>>
>>> ---------------------------------------------------------------------
>>> To unsubscribe, e-mail: poi-user-unsubscribe@jakarta.apache.org
>>> Mailing List: http://jakarta.apache.org/site/mail2.html#poi
>>> The Apache Jakarta Poi Project: http://jakarta.apache.org/poi/
>>>
>
>
>
> ---------------------------------------------------------------------
> To unsubscribe, e-mail: poi-user-unsubscribe@jakarta.apache.org
> Mailing List: http://jakarta.apache.org/site/mail2.html#poi
> The Apache Jakarta Poi Project: http://jakarta.apache.org/poi/
>
>
--
Jeffery S. Swensen
Software Engineer
Merrill Lextranet
Legal Computer Solutions, Inc.
107 Union Wharf
Boston, MA 02109
t. 617-227-4469 x234
jeff.swensen@merrillcorp.com
THE INFORMATION IN THIS MESSAGE IS INTENDED ONLY FOR THE PERSONAL AND CONFIDENTIAL USE OF THE DESIGNATED RECIPIENTS NAMED ABOVE AND MAY CONTAIN LEGALLY PRIVILEGED INFORMATION. If the reader of this message is not the intended recipient or an agent responsible for delivering it to the intended recipient, you are hereby notified that you have received this document in error, and that any review, dissemination, distribution or copying of this message is strictly prohibited. If you have received this communication in error, please notify us immediately by telephone at 617-227-4469 Ext. 200. Thank you.
---------------------------------------------------------------------
To unsubscribe, e-mail: poi-user-unsubscribe@jakarta.apache.org
Mailing List: http://jakarta.apache.org/site/mail2.html#poi
The Apache Jakarta Poi Project: http://jakarta.apache.org/poi/
Re: POI-Ruby
Posted by Avik Sengupta <av...@itellix.com>.
Jeff
You can certainly wrap stuff on your own, but I would figure it will be a lot
of work, which is reason I started on swig. I wouldnt start on it unless you
either have a lot of time, or some significant experience writing C
extensions for ruby (neither of which is true for me)
You'l have to declare the function signatures to call from ruby, convert
objects (eg ruby strings to gcj string objects) and handle memory allocation
and de-allocation on either side. Both ruby and java being garbage collected,
not only will you have to worry about leaks, but also premature collection.
http://www.rubycentral.com/book/ext_ruby.html has the basics. You've
probably already seen this.
With swig, you still have to worry about all this, but a lot of the
boilerplate is generated. For eg, you'll have to write the object wrapping
code once, and not worry about calling it every time an object is referenced.
As for segfaults, the whole thing, i've found, is quite sensitive to swig
version. Maybe you can try with an older swig version?
Regards
-
Avik
On Thursday 22 Mar 2007 3:03:11 am Andrew C. Oliver wrote:
> Okay from Ruby on Linux...yes POI-ruby is probably your best option
>
> I thought you were doing from C on Linux.... Hopefully Avik is around
> and he can help... I'll ping him if he doesn't answer.
>
> Jeff Swensen wrote:
> > I might be stating my intention incorrectly. I have the relevant bits
> > from poi-ruby compiled with gcj, and am attempting to wrap that myself
> > instead of using SWIG.
> >
> > As far as open office and gnumeric, I have been unable to find a fully
> > featured discrete library for writing XLS files from ruby on linux.
> > Would be most appreciative if you could point me to one.
> >
> > Andrew C. Oliver wrote:
> >> Why?
> >> Why not just compile with GCJ and then wrap that?
> >>
> >> Seems weird to go 3 techs deep...
> >>
> >> Also there are C utils for OLE and XLS. Check out open office and
> >> gnumeric...use those...doesn't make sense to use C->Ruby->POI
> >>
> >> Jeff Swensen wrote:
> >>> I am attempting to write my own C wrapper for the POI Ruby bindings and
> >>> am looking for some guidance. I compiled poi4r using the swig wrapper
> >>> only to result in a segfault which I'm unable to track down. It also
> >>> seems that swig generates a lot of unnecessary bloat while creating the
> >>> wrapper, which is why I decided to try to replace it with my own
> >>> version (also partly due to some feedback from my boss who seems to
> >>> dislike swig quite a bit).
> >>>
> >>> Are there any resources you could point me to for writing the ruby
> >>> interface? I understand that at the most basic level I need to define
> >>> all of the Java classes and public methods, but after that I'm at a
> >>> loss. I've tried googling but I can't find any examples of writing a c
> >>> extension to wrap compiled java for ruby.
> >>>
> >>> Thanks,
> >>> Jeff
> >>>
> >>>
> >>> ---------------------------------------------------------------------
> >>> To unsubscribe, e-mail: poi-user-unsubscribe@jakarta.apache.org
> >>> Mailing List: http://jakarta.apache.org/site/mail2.html#poi
> >>> The Apache Jakarta Poi Project: http://jakarta.apache.org/poi/
> >
> > ---------------------------------------------------------------------
> > To unsubscribe, e-mail: poi-user-unsubscribe@jakarta.apache.org
> > Mailing List: http://jakarta.apache.org/site/mail2.html#poi
> > The Apache Jakarta Poi Project: http://jakarta.apache.org/poi/
---------------------------------------------------------------------
To unsubscribe, e-mail: poi-user-unsubscribe@jakarta.apache.org
Mailing List: http://jakarta.apache.org/site/mail2.html#poi
The Apache Jakarta Poi Project: http://jakarta.apache.org/poi/
Re: POI-Ruby
Posted by "Andrew C. Oliver" <ac...@buni.org>.
Okay from Ruby on Linux...yes POI-ruby is probably your best option
I thought you were doing from C on Linux.... Hopefully Avik is around
and he can help... I'll ping him if he doesn't answer.
Jeff Swensen wrote:
> I might be stating my intention incorrectly. I have the relevant bits
> from poi-ruby compiled with gcj, and am attempting to wrap that myself
> instead of using SWIG.
>
> As far as open office and gnumeric, I have been unable to find a fully
> featured discrete library for writing XLS files from ruby on linux.
> Would be most appreciative if you could point me to one.
>
> Andrew C. Oliver wrote:
>
>> Why?
>> Why not just compile with GCJ and then wrap that?
>>
>> Seems weird to go 3 techs deep...
>>
>> Also there are C utils for OLE and XLS. Check out open office and
>> gnumeric...use those...doesn't make sense to use C->Ruby->POI
>>
>> Jeff Swensen wrote:
>>
>>> I am attempting to write my own C wrapper for the POI Ruby bindings and
>>> am looking for some guidance. I compiled poi4r using the swig wrapper
>>> only to result in a segfault which I'm unable to track down. It also
>>> seems that swig generates a lot of unnecessary bloat while creating the
>>> wrapper, which is why I decided to try to replace it with my own version
>>> (also partly due to some feedback from my boss who seems to dislike swig
>>> quite a bit).
>>>
>>> Are there any resources you could point me to for writing the ruby
>>> interface? I understand that at the most basic level I need to define
>>> all of the Java classes and public methods, but after that I'm at a
>>> loss. I've tried googling but I can't find any examples of writing a c
>>> extension to wrap compiled java for ruby.
>>>
>>> Thanks,
>>> Jeff
>>>
>>>
>>> ---------------------------------------------------------------------
>>> To unsubscribe, e-mail: poi-user-unsubscribe@jakarta.apache.org
>>> Mailing List: http://jakarta.apache.org/site/mail2.html#poi
>>> The Apache Jakarta Poi Project: http://jakarta.apache.org/poi/
>>>
>>>
>>
>
>
> ---------------------------------------------------------------------
> To unsubscribe, e-mail: poi-user-unsubscribe@jakarta.apache.org
> Mailing List: http://jakarta.apache.org/site/mail2.html#poi
> The Apache Jakarta Poi Project: http://jakarta.apache.org/poi/
>
--
>From Windows/Exchange to Linux/Meldware
Buni Meldware Communication Suite
Email, Calendaring, ease of configuration/administration
http://buni.org
---------------------------------------------------------------------
To unsubscribe, e-mail: poi-user-unsubscribe@jakarta.apache.org
Mailing List: http://jakarta.apache.org/site/mail2.html#poi
The Apache Jakarta Poi Project: http://jakarta.apache.org/poi/
Re: POI-Ruby
Posted by Jeff Swensen <je...@merrillcorp.com>.
I might be stating my intention incorrectly. I have the relevant bits
from poi-ruby compiled with gcj, and am attempting to wrap that myself
instead of using SWIG.
As far as open office and gnumeric, I have been unable to find a fully
featured discrete library for writing XLS files from ruby on linux.
Would be most appreciative if you could point me to one.
Andrew C. Oliver wrote:
> Why?
> Why not just compile with GCJ and then wrap that?
>
> Seems weird to go 3 techs deep...
>
> Also there are C utils for OLE and XLS. Check out open office and
> gnumeric...use those...doesn't make sense to use C->Ruby->POI
>
> Jeff Swensen wrote:
>> I am attempting to write my own C wrapper for the POI Ruby bindings and
>> am looking for some guidance. I compiled poi4r using the swig wrapper
>> only to result in a segfault which I'm unable to track down. It also
>> seems that swig generates a lot of unnecessary bloat while creating the
>> wrapper, which is why I decided to try to replace it with my own version
>> (also partly due to some feedback from my boss who seems to dislike swig
>> quite a bit).
>>
>> Are there any resources you could point me to for writing the ruby
>> interface? I understand that at the most basic level I need to define
>> all of the Java classes and public methods, but after that I'm at a
>> loss. I've tried googling but I can't find any examples of writing a c
>> extension to wrap compiled java for ruby.
>>
>> Thanks,
>> Jeff
>>
>>
>> ---------------------------------------------------------------------
>> To unsubscribe, e-mail: poi-user-unsubscribe@jakarta.apache.org
>> Mailing List: http://jakarta.apache.org/site/mail2.html#poi
>> The Apache Jakarta Poi Project: http://jakarta.apache.org/poi/
>>
>
>
---------------------------------------------------------------------
To unsubscribe, e-mail: poi-user-unsubscribe@jakarta.apache.org
Mailing List: http://jakarta.apache.org/site/mail2.html#poi
The Apache Jakarta Poi Project: http://jakarta.apache.org/poi/