public class IssueProjectFilterFactory {
   private String projectAliasSet;
   public void setProjectAliasSet(String projectAliasSet){
      this.projectAliasSet = projectAliasSet;
   }
   @Factory
   public Filter getFilter(){
      Term term = new Term("project.key", projectAliasSet);
      Query query = (Query) new TermQuery(term);
      return new CachingWrapperFilter(new QueryWrapperFilter((org.apache.lucene.search.Query) query));
   }
      @Key
   public FilterKey getKey()
   {
      StandardFilterKey key = new StandardFilterKey();
      key.addParameter(projectAliasSet);
      return key;
   }
}

@Entity
@Indexed
@Table(name = "DEMANDE", uniqueConstraints = { @UniqueConstraint(columnNames = { "PRJ_PRJ_ID", "DEM_NUM" }) })
@FullTextFilterDef(name="project", impl=IssueProjectFilterFactory.class)
public class Issue implements Cloneable, Serializable {
   @Id
   @Column(name = "DEM_ID", nullable = false)
   @GeneratedValue(generator = "IssueSeq", strategy = GenerationType.SEQUENCE)
   @SequenceGenerator(name = "IssueSeq", sequenceName = "IBOWNER.DEM_SEQ", allocationSize = 1)
   private int id;

   @IndexedEmbedded
   @ManyToOne(fetch = FetchType.EAGER)
   @JoinColumn(name = "PRJ_PRJ_ID", nullable = false)
   @NotFound(action = NotFoundAction.IGNORE)
   private Project project;
   
   @Field
   @Column(name = "DEM_TITRE", length = 255, nullable = false)
   private String title;

   @Field
   @Column(name = "DEM_DESC", length = 4000, nullable = true)
   private String description;
        ...
}

@Entity
@Indexed
@Table(name = "PROJET")
public class Project implements Serializable {

   @Id
   @Column(name = "PRJ_ID", nullable = false)
   @GeneratedValue(generator = "ProjectSeq", strategy = GenerationType.SEQUENCE)
   @SequenceGenerator(name = "ProjectSeq", sequenceName = "IBOWNER.PRJ_SEQ", allocationSize = 1)
   private int id;
   
   @Field
   @Column(name = "PRJ_ALIAS", length = 9, nullable = false, unique = true)
   private String key;
        ...
}

      Session session = HibernateUtils.getSession(sid, account);
      FullTextSession ftSession = Search.getFullTextSession(session);      
      
      ftSession.getTransaction().begin();
      List<Issue> issues = session.createQuery("select i from Issue i").list();
      
      for(Issue issue : issues){
         ftSession.index(issue);
      }      
      ftSession.getTransaction().commit();
      
      String searchQuery = "title:Ajout OR description:test OR comments.description:test";
      org.apache.lucene.search.Query luceneQuery;
      QueryParser parser = new QueryParser(org.apache.lucene.util.Version.LUCENE_29,"title",new StandardAnalyzer(org.apache.lucene.util.Version.LUCENE_29));
      try {
         luceneQuery = parser.parse(searchQuery);
      }
      catch (ParseException e) {
         throw new RuntimeException("Unable to parse query: " + searchQuery, e);
      }
      org.hibernate.search.FullTextQuery query =  ftSession.createFullTextQuery(luceneQuery, Issue.class);
      query.enableFullTextFilter("project").setParameter("projectAliasSet", "BUZZ");
      
      //Hibernate Core Query APIs
      List<Issue> list = query.list();
      
      // Show results   
      if (list != null) {
         for (Issue issue : list) {
            log.debug(issue.toString());
         }
      }