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From Ype Kingma <ykin...@xs4all.nl>
Subject Re: existing or not existing
Date Wed, 05 Dec 2001 08:38:57 GMT
Otis,

>You could try looking for a segments file in the index directory.
>If it exists, the index exists, else it does not.
>
>Is there a better way?

Simply create an indexreader and catch the IOException to handle the non
existing case.

Ype.


>Otis
>
>--- jean-christian.gagne@prasahewitt.ch wrote:
>>
>>
>> Hi there,
>>
>> I'm testing Lucene after reading a good article on it on JavaWorld.
>>
>> Lucene seems quite simple and very powerful, but there's something I
>> can't get.
>> The first time an application uses an index, this one doesn't exist
>> yet, so the
>> boolean argument of the IndexWriter constructor must be true
>> (creating a new
>> empty index). Next time the same app is started, I want to use the
>> existing
>> index, the boolean argument must be false. Here is my question : how
>> do I know
>> wether the index exists or not ??  Is there a way to create an
>> IndexWriter on a
>> given index, creating it only if needed ?
>>
>> It seems like a stupid question, I must have missed something...
>>
>> Thanks
>>
>>
>> JCG
>>
>>
>>
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>
>
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