public void indexDocument(FB2Document fb2doc, String path) throws IOException {
        Document doc = new Document();
        if (fb2doc.getBookTitle() != null) {
            doc.add(new Field("bookTitle", fb2doc.getBookTitle(), TextField.TYPE_STORED));
        }
        if (fb2doc.getFirstName() != null) {
            doc.add(new Field("firstName", fb2doc.getFirstName(), TextField.TYPE_STORED));
        }
        if (fb2doc.getLastName() != null) {
            doc.add(new Field("lastName", fb2doc.getLastName(), TextField.TYPE_STORED));
        }
        if (fb2doc.getGenre() != null) {
            doc.add(new Field("genre", fb2doc.getGenre(), TextField.TYPE_STORED));
        }
        if (fb2doc.getSrcLang() != null) {
            doc.add(new Field("srcLang", fb2doc.getSrcLang(), TextField.TYPE_STORED));
        }        
        doc.add(new Field("text", fb2doc.getText().toString(), TextField.TYPE_NOT_STORED));
        doc.add(new Field("path2", path, TextField.TYPE_STORED));
        Term term = new Term("path", path);
        indexWriter.updateDocument(term, doc);
    }