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From jian chen <>
Subject Re: Books about Lucene?
Date Fri, 26 Aug 2005 19:12:54 GMT
Hi, Erik,

I some time ago played with the Lucene 1.2 source code and made some 
modifications to it, trying to add my own ranking algorithm. I am not sure 
if Licence wise, it is permissible to modify the earlier source code, also 
if it is allowed to put the modified version or the description of what I 
have done on wiki?

Thanks for your reply.


On 8/26/05, Erik Hatcher <> wrote:
> I appreciate the vote of confidence on this, but I am not afraid to
> admit that I do not consider myself an expert on the deep innards of
> Lucene. I understand the concepts, and a bit of the internals, but I
> certainly do not live up to the hype you just bestowed upon me. *blush*
> Regarding JDK 1.2 - I came to Java at 1.3, and have never used a JDK
> earlier than that. All the apps I build now are currently on JDK 1.5
> (err... 5.0). I do not currently know what would be involved in
> running Lucene on a 1.2 VM. The first question to ask is whether an
> earlier version of Lucene is sufficient for the needs of those
> constrained to JDK 1.2. If not, then we move forward to defining
> what needs to be changed - a simple compilation of the trunk source
> code with a 1.2 VM would give away most of the details.
> As with open source in general, it is about scratching our own
> itches. If you're using Lucene (or need to use Lucene) in a 1.2 VM,
> that is your itch to scratch and I would happily support your efforts
> in some way in documenting this (either on the wiki or embedded in
> Lucene's own built-in documentation) or in providing an alternative
> version of Lucene that is suitable for 1.2 (perhaps by having
> alternative code in a separate directory within our code
> repository). If you create such documentation, perhaps you'd be
> willing to donate it with full attribution to the 2nd edition of
> LIA. But please don't wait for me to do it, as it really is not
> something I need personally for any project - all my projects are at
> JDK 1.5 currently.
> Erik

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