private void checkHitsForUpdate(LuceneHits hits) {
if (hits.length() == 0) {
throw new LuceneIndexAccessException("The identifier returns no document.");
}
if (hits.length() > 1) {
throw new LuceneIndexAccessException("The identifier returns more than one document.");
}
}
public void updateDocument(
Term identifierTerm, DocumentModifier documentModifier, Analyzer analyzer) {
LuceneIndexReader reader = IndexReaderFactoryUtils.getIndexReader(indexFactory);
LuceneSearcher searcher = null;
Document updatedDocument = null;
try {
searcher = reader.createSearcher();
LuceneHits hits = searcher.search(new TermQuery(identifierTerm));
checkHitsForUpdate(hits);
updatedDocument = documentModifier.updateDocument(hits.doc(0));
} catch (Exception ex) {
throw new LuceneIndexAccessException("Error during updating a document.", ex);
} finally {
SearcherFactoryUtils.closeSearcher(searcher);
IndexReaderFactoryUtils.releaseIndexReader(indexFactory, reader);
}
deleteDocuments(identifierTerm);
addDocument(updatedDocument, analyzer);
}