我正在使用Hibernate-search在我的Jboss应用程序中搜索数据。我有3个JPA实体类,它们都扩展了BaseEntity类,每个类都被Lucene索引。例如:
@MappedSuperclass
public abstract class BaseEntity implements Serializable {
@Temporal(TemporalType.TIMESTAMP)
private Date created;
public abstract Long getId();
}
@Entity
@Table(name = "DVD")
public class Dvd extends BaseEntity {
@Id
@GeneratedValue(strategy = GenerationType.AUTO)
private Long id;
@Field
private String title;
}
@Entity
@Table(name = "BOOK")
public class Book extends BaseEntity {
@Id
@GeneratedValue(strategy = GenerationType.AUTO)
private Long id;
@Field
private String author;
}
现在我想通过通配符搜索查询搜索DVD标题或书籍作者,并将结果列表作为列表。这就是我迄今为止所拥有的:
public List<BaseEntity> search(String query, int firstResult, int maxResults) {
List<BaseEntity> results = null;
FullTextEntityManager fullTextEntityManager = Search.getFullTextEntityManager(em);
Query luceneQuery = new WildcardQuery(new Term("*", "*" + query + "*"));
FullTextQuery fullTextQuery = fullTextEntityManager.createFullTextQuery(luceneQuery, BaseEntity.class);
fullTextQuery.setFirstResult(firstResult);
fullTextQuery.setMaxResults(maxResults);
results = fullTextQuery.getResultList();
return results;
}
但有了这个,我没有得到任何结果。如何在不使用buildQueryBuilder为每个实体的情况下实现这一点或者是否有可能?谢谢!
答案 0 :(得分:1)
您需要对类使用varargs样式方法,如下所示:
FullTextQuery fullTextQuery = fullTextEntityManager.createFullTextQuery(luceneQuery, DVD.class, Book.class);
这是因为当Hibernate Search创建搜索查询时,它会将类名添加到查询中(对于_hibernate_class字段,这是索引类的名称)。