I am able to delete now the Index using the following
if(indexDir.exists())
{
IndexReader reader = IndexReader.open( indexDir );
uidIter = reader.terms(new Term("id", ""));
while (uidIter.term() != null && uidIter.term().field() == "id") {
reader.delete(uidIter.term());
uidIter.next();
}
reader.close();
}
where "id" is the keyword field. But here also all the documents are
deleted. How can I modify my code and delete particular document with given
id
Iam creating the index in the following way
Document doc = new Document();
doc.add(Field.Text("text",text));
doc.add(Field.Keyword("id",Long.toString(id)));
doc.add(Field.Keyword("title",title));
doc.add(Field.Keyword("keywords",keywords));
doc.add(Field.Keyword("type",type));
writer.addDocument(doc);
----- Original Message -----
From: "Chuck Williams" <[EMAIL PROTECTED]>
To: "Lucene Users List" <[EMAIL PROTECTED]>
Sent: Wednesday, November 24, 2004 1:06 PM
Subject: RE: modifying existing index
A good way to do this is to add a keyword field with whatever unique id
you have for the document. Then you can delete the term containing a
unique id to delete the document from the index (look at
IndexReader.delete(Term)). You can look at the demo class IndexHTML to
see how it does incremental indexing for an example.
Chuck
> -----Original Message-----> From: Santosh
[mailto:[EMAIL PROTECTED]> Sent: Tuesday, November 23, 2004 11:34
PM> To: Lucene Users List> Subject: Re: modifying existing index> > I have
gon through IndexReader , I got method : delete(int> docNum) ,> but
from where I will get document number? Is this predifined? or
we> have> to give a number prior to indexing?> ----- Original
Message -----> From: "Luke Francl" <[EMAIL PROTECTED]>> To: "Lucene
Users List" <[EMAIL PROTECTED]>> Sent: Wednesday, November 24,
2004 1:26 AM> Subject: Re: modifying existing index> > > > On Tue,
2004-11-23 at 13:59, Santosh wrote:> > > I am using lucene for indexing,
when I am creating Index the> docuemnts> are added. but when I want to
modify the single existing document
and> reIndex again, it is taking as new document and adding one more
time, so> that I am getting same document twice in the results.> > > To
overcome this I am deleting existing Index and again
recreating> whole> Index. but is it possibe to index the modified document
again and> overwrite> existing document without deleting and recreation. can
I do this? If
so> how?> >> > You do not need to recreate the whole index. Just mark the
document as> > deleted using the IndexReader and then add it again with the>
> IndexWriter. Remember to close your IndexReader and IndexWriter
after> > doing this.> >> > The deleted document will be removed the next
time you optimize
your> > index.> >> > Luke Francl> >> >> >
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