Question

I am using Hibernate search.

I have a search text box in my jsp page. If I enter some text, it returns correct result.
But if I leave empty message and click the search button, it did not return any records.

Code:

Session session = HibernateUtil.getSessionFactory().getCurrentSession();
session.beginTransaction();

String searchQuery = "Admin";
String[] userFields = {"firstName", "lastName", "role_groupName", "userId"};
QueryParser parser = new MultiFieldQueryParser(userFields, new StandardAnalyzer());
org.apache.lucene.search.Query luceneQuery;
try
{
    luceneQuery = parser.parse(searchQuery);
}
catch (ParseException e) 
{
    throw new RuntimeException("Unable to parse query: " + searchQuery, e);
}

FullTextSession ftSession = Search.getFullTextSession(session);
org.hibernate.Query query = ftSession.createFullTextQuery(luceneQuery, UserVO.class);

List results = query.list();
System.out.println("Result size:" + results.size());    

Answer 1

I just put “*”, if the search text box is empty. So that it returns all the records.
Now it is working fine for me.
This is my code.

try
{
    if(searchText == null || searchText.trim().length()==0)
    {
        searchText = "*";
    }
        luceneQuery = parser.parse(searchText);
    }
    catch (ParseException e)
    {
        throw new RuntimeException("Unable to parse query: " + searchText, e);
    }