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ambika_devi
 Post subject: Hibernate Search with clob datatype makes problem
PostPosted: Fri Jun 13, 2008 5:53 am 
Beginner
Beginner

Joined: Mon Oct 01, 2007 8:21 am
Posts: 40
Hi

Im trying with hibernate search functionality, hibernate search is working fine when i index string data type,

My POJO:
Code:

@Entity
@Indexed
public class ConferenceInfo  implements java.io.Serializable {


    @Id
    @DocumentId
     private String conferenceId;
   
    @ContainedIn
     private EventDb eventDb;
   
     private String createdBy;
     private Date dateCreated;
     private String modifiedBy;
     private Date dateModified;
     
     @Field(index=Index.TOKENIZED, store=Store.NO)
     private String theme;
     
     @Field(index=Index.TOKENIZED, store=Store.NO)
     private Clob overview;
     
     @Field(index=Index.TOKENIZED, store=Store.NO)
     private String trackOverview;
     


Im getting the error for the fields overview corresponding to the dataType clob.
Error:
Code:
org.hibernate.search.SearchException: Unable to guess FieldBridge for overview
   at org.hibernate.search.bridge.BridgeFactory.guessType(BridgeFactory.java:180)
   at org.hibernate.search.engine.DocumentBuilder.bindFieldAnnotation(DocumentBuilder.java:321)
   at org.hibernate.search.engine.DocumentBuilder.initializeMember(DocumentBuilder.java:220)
   at org.hibernate.search.engine.DocumentBuilder.initializeMembers(DocumentBuilder.java:167)
   at org.hibernate.search.engine.DocumentBuilder.<init>(DocumentBuilder.java:94)
   at org.hibernate.search.impl.SearchFactoryImpl.initDocumentBuilders(SearchFactoryImpl.java:262)
   at org.hibernate.search.impl.SearchFactoryImpl.<init>(SearchFactoryImpl.java:94)
   at org.hibernate.search.impl.SearchFactoryImpl.getSearchFactory(SearchFactoryImpl.java:172)
   at org.hibernate.search.event.FullTextIndexEventListener.initialize(FullTextIndexEventListener.java:44)
   at org.hibernate.event.EventListeners.initializeListeners(EventListeners.java:356)
   at org.hibernate.cfg.Configuration.getInitializedEventListeners(Configuration.java:1304)
   at org.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:1294)
   at com.i3l.sample.test.Example.main(Example.java:60)



As specified in the hibernate search document,
Quote:
Then any property or field can use this bridge thanks to the @FieldBridge annotation

@FieldBridge(impl = PaddedIntegerBridge.class)
private Integer length;


should v write any stringBridge class for the clob and character datatype.

Any suggesstions pls come ahead. I really dont no how to do.

Thanks,
Ambika.
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hardy.ferentschik
 Post subject:
PostPosted: Fri Jun 13, 2008 9:58 am 
Hibernate Team
Hibernate Team

Joined: Thu Apr 05, 2007 5:52 am
Posts: 1689
Location: Sweden
Hi Ambika,

have you tried to map your overview property like this?

Code:
     @Field(index=Index.TOKENIZED, store=Store.NO)
     @Lob
     private String overview;


Assuming of course that the overview is a string ;-)

If for some reason you have to stick with the Clob type you will have to write your own FieldBridge as described in the Hibernate Search documentation.

--Hardy
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ambika_devi
 Post subject:
PostPosted: Mon Jun 16, 2008 2:53 am 
Beginner
Beginner

Joined: Mon Oct 01, 2007 8:21 am
Posts: 40
Hi Hardy,

for some reason i would like to stick on to CLOB data type for the overview.

I tried like this but still this is not working as such,

Code:
public class ClobImpl implements StringBridge {
   
   public String objectToString(Object object) {
      // TODO Auto-generated method stub
                                System.out.println("Reached objectToString Method===>");
       Clob overview = ( (Clob) object );
       String str = null;
      

try{
       BufferedReader br = new BufferedReader(overview.getCharacterStream());

       String line = null;

       while((line = br.readLine())!= null){

       str.concat(line);

       }

       }catch(SQLException e){

       e.printStackTrace();

       }catch(IOException e){

       System.out.println("");

       e.printStackTrace();

       }

       return overview.toString();

      
   }
}


i tried in the other wy aslo, but still helpless,
Code:
public class ClobImpl implements StringBridge {
   
   public String objectToString(Object object) {
             System.out.println("Reached objectToString Method===>");
      // TODO Auto-generated method stub
                              String Overview = ( (Clob) object ).toString();
                              StringBuilder clobstring = new StringBuilder( );
                              return clobstring .append( Overview ).toString();
                }
}


In my pojo like this,
@FieldBridge(impl = ClobImpl.class)
private Clob overview;

but still i feel the first statement only not reached, the System.out.println("Reached objectToString Method===>");
itself is not printed.

Any idea pls suggest me.

Thanks,
Ambika
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hardy.ferentschik
 Post subject:
PostPosted: Mon Jun 16, 2008 4:32 am 
Hibernate Team
Hibernate Team

Joined: Thu Apr 05, 2007 5:52 am
Posts: 1689
Location: Sweden
Hi Ambika,

you still have to have the @Field annotation

ambika_devi wrote:
In my pojo like this,
@FieldBridge(impl = ClobImpl.class)
private Clob overview;

Code:
@Field
@FieldBridge(impl = ClobImpl.class)
private Clob overview;

or like this in one single annotation:
Code:
  @Field(bridge = @FieldBridge(impl = ClobImpl.class.class))
  private Clob overview;


--Hardy
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ambika_devi
 Post subject:
PostPosted: Mon Jun 16, 2008 7:47 am 
Beginner
Beginner

Joined: Mon Oct 01, 2007 8:21 am
Posts: 40
Thanks Hardy,

Its Working!
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