indexing data without writing to disk ?

[Patrick Diviacco]

Is there a way to index data into memory without writing to disk in Lucene ?

This is my current code storing it on disk

writer = new IndexWriter(FSDirectory.open(index_dir), new
IndexWriterConfig(org.apache.lucene.util.Version.LUCENE_40, new
WhitespaceAnalyzer(org.apache.lucene.util.Version.LUCENE_40)));

//store sorted content to contents
Iterator<Map.Entry<String,Cluster>> it = clusters.entrySet().iterator();

while (it.hasNext()) {

...
Document document  = new Document();
                document.add(new Field("id", id, Field.Store.YES,
Field.Index.ANALYZED));
               writer.addDocument(document);
}
writer.optimize();
writer.close();


thanks