[Xapian-devel] Initial patch for ExternalPostList

[Rusty Conover]

Hi Everybody,

Here is the first version of my match for an ExternalPostList, it  
should apply cleanly to 0.9.5 and 0.9.6.

You can use it by first implementing an ExternalPostingSource, then  
creating a new Query object passing a reference an instance of your  
implementation to the constructor, see query.h. The  
ExternalPostingSource implementation is reference counted, so when  
its no longer needed it can clean itself up.

It works well for filtering results but it has a problem that once it  
filters all of the results are returned with 100% relevancy. I'm not  
quite sure how to fix that but I think its because I just used the  
default weight implementations in matcher/externalsourcepostlist.h.   
Any hints or patches to fix that so it works correctly would be  
greatly appreciated.

Also the use of an ExternalPostList query breaks the network method  
of transmitting queries, I haven't written code to serialize the post  
list or even decide if that's worth doing.

I realize there has been some stylistic license taken with the  
formatting of this patch. I didn't pay much attention to following  
existing indentation and bracket rules and what not.  If you're up  
for including this into the release branch, I'd be glad to take the  
time and clean it up even further.

Thanks for all of your help,

Rusty
--
Rusty Conover
InfoGears Inc.
Web: http://www.infogears.com



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