hibernate search problem w/ entity inheritance

newmanw10 · **Joined:** Wed Dec 09, 2009 3:42 pm **Posts:** 5

I am using hibernate-search 3.0.1.GA.

I am trying to create an index with entities that inherit off a base entity;

Here is the main entity I want to store the id in the index. It has many text items. The text item has two child classes one child has a varchar the other has a clob. I want to index the text for both of those child entities in the same index. I.E. when searching for text I want my search to return a docId if the text exists in either if my children classes/tables.

Code:

@Entity
@Indexed(index = "text")
@Table(name = "DOC")
public class Doc implements java.io.Serializable {
.
   private Set<TextItem> textItems = new HashSet<TextItem>(0);
.
.
   @Id
   @DocumentId
   @Column(name = "DOC_ID", unique = true, nullable = false, scale = 0)
   @GeneratedValue( strategy=GenerationType.SEQUENCE, generator="GS_DOC_GEN" )
   @SequenceGenerator( name="GS_DOC_GEN", sequenceName="GS_DOC", allocationSize=1 )
   public long getDocId() {
      return this.docId;
   }
.
.
   @IndexedEmbedded
   @OneToMany(fetch = FetchType.LAZY, mappedBy = "doc", cascade = CascadeType.ALL)
   public Set<TextItem> getTextItems() {
      return this.textItems;
.
.
   }

TextItem entity (this is the parent class) This class does not have any search annotations, the children classes have them

Code:

Entity
@Table(name = "TEXTITEM")
@Inheritance(strategy=InheritanceType.JOINED)
public class TextItem implements java.io.Serializable {
.
.

.
.

Here is one of the children (both look the same except for type of text field)

Code:

@Entity
@Table(name="TEXTITEM_CHR_VALUE")
public class TextItemCharValue  extends TextItem {
.
.
    @Column(name="VALUE", nullable=false)
    @Field(index=Index.TOKENIZED)
    public String getValue() {
        return this.value;
    }
.
.

So I want to index the value field on my child table so I use the @Field. I am not sure if I need anything on the parent class (TextItem) as far as annotations, and I have the EmbeddedIndex annotation on the TextItems in the Doc entity.

I am not getting a field for value for this situation. If I have a @Field in the parent class a field gets created just fine but it seems like the @Field annotations are ignored in the children classes. How do I index off of DocID when the Doc entity contains a set of parent entities that do not have anything to store (the children have the data)?

Thanks in advance!

dmaier · **Joined:** Tue Aug 24, 2010 1:49 pm **Posts:** 4

Have you solved this? I'm having the same problem. Thx.

sanne.grinovero · **Posted:** Fri Sep 03, 2010 3:19 am

the current implementation uses a static mapping, so all documents are built as being of type "TextItem" which has no fields.
It's pretty easy to workaround this limitation using a ClassBridge defined on TextItem, or a fieldbridge on the getter.

sanne.grinovero · **Posted:** Fri Sep 03, 2010 3:26 am

found the reference: http://opensource.atlassian.com/projects/hibernate/browse/HSEARCH-438

emmanuel · **Posted:** Fri Sep 03, 2010 12:02 pm

Note that by reversing the query you can achieve what you want.

Code:

Query luceneQuery = parser.parse("value:hibernate AND doc.id:12");
Query query = fts.createQuery( luceneQuery, TextItem.class );