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Posted to java-user@lucene.apache.org by Shane <lu...@my-family.us> on 2007/02/23 19:53:18 UTC

Determining if index exists Lucene 2.1

Hi,

Prior to Lucene 2.1, I was using FSDirectory.getDirectory(String path, 
boolean create)|| inside of a try block to determine whether or not a 
directory existed.

With the deprecation of the above class call in Lucene 2.1,  I need a 
new method for determining the existence of an index.  I can just check 
to see if either of the files INDEX_PATH/segments or 
INDEX_PATH/segments.gen exist, but that doesn't seem like the best route.

Is there a function call to determine whether or not an index already 
exists?

Thanks,

Shane

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Re: Determining if index exists Lucene 2.1

Posted by Michael McCandless <lu...@mikemccandless.com>.
Shane wrote:

> Prior to Lucene 2.1, I was using FSDirectory.getDirectory(String path, 
> boolean create)|| inside of a try block to determine whether or not a 
> directory existed.
> 
> With the deprecation of the above class call in Lucene 2.1,  I need a 
> new method for determining the existence of an index.  I can just check 
> to see if either of the files INDEX_PATH/segments or 
> INDEX_PATH/segments.gen exist, but that doesn't seem like the best route.
> 
> Is there a function call to determine whether or not an index already 
> exists?

You want IndexReader.indexExists(...).

Also you may want to use the new constructors to IndexWriter that create
a new index if there isn't one already, else open the existing one.

Mike

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Re: Determining if index exists Lucene 2.1

Posted by karl wettin <ka...@gmail.com>.
23 feb 2007 kl. 19.53 skrev Shane:
>
> Is there a function call to determine whether or not an index  
> already exists?

<http://lucene.apache.org/java/docs/api/org/apache/lucene/index/ 
IndexReader.html#indexExists(org.apache.lucene.store.Directory)>

HTH

-- 
karl

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