The JavaDoc for FSDirectory.getDirectory() is pretty clear about this:
http://jakarta.apache.org/lucene/docs/api/org/apache/lucene/store/FSDirectory.html#getDirectory(java.lang.String,%20boolean)
The files, if they exist, get erased, when create is True.
Right, I understood that. I was asking about strategies for managing this, given that the same code that would create the table, if run a second time, will wipe out the old index without any warning.
If it isn't clear already, I have very little experience with Java. I'm a Python fish in a sea of Java coders, however... ;-)
I think that the lucene-user mailing list is a very good source of information about strategies for using the Lucene APIs. Given that the PyLucene APIs match the Java Lucene APIs almost 1-1 any advice you can get there is likely not to be too java-specific and to apply to PyLucene usage as well.
http://jakarta.apache.org/site/mail2.html#Lucene
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