[Xapian-devel] Summer of Code help

Anish Kanchan anishgkanchan at gmail.com
Fri Feb 28 13:48:50 GMT 2014

With the #616 bug now solved, I would like to solve more bugs. Could you
please give me links of those.
Also the as Xapian Java Bindings project is supposed to be too simple, I'm
thinking of working on PHP Bindings improvement as well.

Could you please guide me on how I can go about it?

And what else could I do to strengthen my chances of getting selected in

Anish Kanchan
Student, University of Mumbai

On Thu, Feb 27, 2014 at 5:22 PM, Anish Kanchan <anishgkanchan at gmail.com>wrote:

> I think there is a development in the bug #616.
> The exception obtained is:
> Exception in thread "main" java.lang.IllegalArgumentException: No enum
> class org.xapian.TermGenerator$flags with value 0
>  at org.xapian.TermGenerator$flags.swigToEnum(TermGenerator.java:143)
>  at org.xapian.TermGenerator.setFlags(TermGenerator.java:71)
>  at org.xapian.examples.SimpleIndex.main(SimpleIndex.java:54)
> Error seems to occur in the swigToEnum method.
> So I checked
> http://www.swig.org/Doc2.0/SWIGDocumentation.html#Java_enum_classes
> We could expect a similar class to get built in our case except that
> 'flags' would have only one type in it ie.'FLAG_SPELLING'. And the rest of
> the values in the class would get set accordingly.
> Now when
> flags(0) is executed, the swigToEnum method will run with 0 as a
> parameter. And this method tries to return a type whose value matches the
> value of the passed parameter.
> So it is unable to find a type with value 0 (FLAG_SPELLING has value
> 128) and hence throws the exception.
> Thanks and Regards,
> Anish Kanchan
> Student, University of Mumbai
> On Tue, Feb 25, 2014 at 6:06 AM, Olly Betts <olly at survex.com> wrote:
>> On Tue, Feb 25, 2014 at 02:45:28AM +0530, Anish Kanchan wrote:
>> > Xapian is a search engine library written in C/C++. It can be
>> > integrated with web applications which handle large amount of data.
>> > But since the web applications may be written in a variety of languages
>> a
>> > binding is required for the web app to be able to connect to the xapian
>> > software. And SWIG plays a role in generating intermediate code for the
>> web
>> > app to link with the bindings.
>> >
>> > I'd like to know if what I've understood is correct.
>> Yes.
>> Scripting languages generally provide a C API which allows you to write
>> a wrapper, but trying to maintain such wrappers by hand for a large API
>> is quite a lot of work.  SWIG helps to automate that job by generating
>> wrapper code which uses the available C API for you.
>> Often we can add a new method to the C++ API and need to do nothing
>> extra to have it available in the bindings.  Sometimes it gets wrapped,
>> but we need to give SWIG some help to wrap it in the best way.
>> You might find this talk I gave at Kiwi PyCon 2011 helpful - there
>> are slides and recorded audio there:
>> http://survex.com/~olly/talks/pythonic-swig/
>> Cheers,
>>     Olly
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