public void buildIndex() throws IOException {
		
		IndexReader.unlock(FSDirectory.getDirectory(luceneIndexDir, false));

		
		indexWriter = new IndexWriter(luceneIndexDir, analyzer, true);  

		Iterator catalogEntries = catalogDAO.getAllEntries();
        while (catalogEntries.hasNext()) {
			CatalogEntry entry = (CatalogEntry) catalogEntries.next();			
            Document doc = documentBuilder.getLuceneDocument(entry);
            if (doc != null) {
                indexWriter.addDocument(doc);
            }
        }		
        

        
        //optimize the index
        indexWriter.optimize();

        //close the index
        indexWriter.close();
        indexWriter = null;
        

    }