H Search Whitespace Issue

WeirdAl · **Joined:** Fri Apr 27, 2007 5:05 pm **Posts:** 7

Hi,
I have problems to analyze Strings with whitespaces in H Search.

I use this method to search over multiple fields and return the corresponding List (List with hits)

Code:

public static List<Character> getResultList(String fullText, String gameFilter){
               
      List<Character> result = null;
      org.apache.lucene.search.Query luceneQuery = null;

      Session session = HibernateUtil.getSessionFactory().getCurrentSession();
      FullTextSession fullTextSession = Search.createFullTextSession(session);
      
      
      String[] fields = {"name","guild","server"};
      MultiFieldQueryParser parser = new MultiFieldQueryParser(fields, new WhitespaceAnalyzer());
            
      try {
         luceneQuery = parser.parse(fullText);
      } catch (ParseException e) {
         e.printStackTrace();
      }
      org.hibernate.Query fullTextQuery = fullTextSession.createFullTextQuery( luceneQuery );
              
      //look in the database for Character Objects
      session.beginTransaction();
      result = fullTextQuery.list(); //return a list of managed objects    
      session.getTransaction().commit();
      return result;
}

My class character has got a String name where I can write "Surname name" for instance. If I am looking for this name by using Surname*, I am able to find the character. But if I use only Surname without the Wildcard I didn't find it. Could anybody help me here?

Thnx
Alex

emmanuel · **Posted:** Thu May 31, 2007 1:28 pm

Seems like you don't use the same analyzer for querying and indexing

WeirdAl · **Joined:** Fri Apr 27, 2007 5:05 pm **Posts:** 7

Hi,
first I used the Keywordanalyzer and now I tried to switch to the Whitespaceanalyzer. I deleted the old indexes and now the search only found new created characters. I think I have to try the Lucene Demo war file first and look how I recreate a proper index.

Thnx for that hint with the Analyzer and Indexing :)

Edit: I create now a setIndexHelperMethod to ensure that all characters are indexed (after I deleted the index or try to change the Analyzer). Is that a good approach to use this helper method every time I change something at the search or the @Index in the Character DTO?

Helper Method:

Code:

public static void indexCharacters(){
      Session session = HibernateUtil.getSessionFactory().getCurrentSession();
      FullTextSession fullTextSession = Search.createFullTextSession(session);
      
      Transaction tx = fullTextSession.beginTransaction();
      
      Query q = session.createQuery("from Character character");
      List<Character> characters = q.list();
           
      for (Character character : characters) {
         fullTextSession.index(character);
      }
      
      tx.commit();
   }

Cu
Alex