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 Post subject: Transfer entities between to database. Id generator problem.
PostPosted: Wed Mar 09, 2011 9:25 am 
Newbie

Joined: Thu Oct 28, 2010 8:38 am
Posts: 4
Location: Ukraine
Bonjour,

I have DBF database.
I have Hibernate database model with xml-files of mapping, with identity generators.
And now i need to transfer data from dbf-table using Hibernate.
But the problem is that I don't need auto-generated ID's. they should be the same as in DBF records.

I think about 2 solutions:
1. Create complex id-generator, that can generate id or can use preset id.
2. Create record in database with generated ID, and than update ID field to needed.

What do you think????

Merci beaucoup.


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 Post subject: Re: Transfer entities between to database. Id generator problem.
PostPosted: Wed Mar 09, 2011 10:33 am 
Newbie

Joined: Thu Oct 28, 2010 8:38 am
Posts: 4
Location: Ukraine
I find solution by modifying IdentityGenerator generator:

public class Generator extends IdentityGenerator
{

@Override
public Serializable generate(SessionImplementor sessionImplemetor, Object object) throws HibernateException
{
Serializable id = sessionImplemetor.getEntityPersister( EmployeeCategory.class.getName(), object ).getIdentifier( object, sessionImplemetor );

if(id==null)
return IdentifierGeneratorHelper.POST_INSERT_INDICATOR;

return id;
}

}

For entities, that have id not null it return id-value, installed by user,
For entities, that have id==null it generate id-value.


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 Post subject: Re: Transfer entities between to database. Id generator problem.
PostPosted: Tue May 15, 2012 9:59 am 
Newbie

Joined: Tue May 15, 2012 9:43 am
Posts: 3
Hi,

I am facing the same problem.and tried your solution.
But dint get the desired output.

Code:
public class CustomIdGenerator implements IdentifierGenerator
{

   @Override
   public Serializable generate(SessionImplementor sessionImplementor, Object object) throws HibernateException
   {
      try
      {
      System.out.println("in custom generator..."+object.getClass().getCanonicalName());
      EntityPersister entityPersister = sessionImplementor.getEntityPersister("restaurantId", object);
      
      Serializable id = entityPersister.getIdentifierGenerator().generate(sessionImplementor, "restaurantId");
      
      System.out.println("id is "+id);
      if(id == null)
      {
         
         return IdentifierGeneratorFactory.POST_INSERT_INDICATOR;
      }
      
      
      return id;
      }
      catch (Exception e)
      {
         System.out.println("in exception ");
         System.out.println(e.getMessage());
         return null;
      }
   }

}


please view the following link: viewtopic.php?f=1&t=1015440
Please help.
Regards,

Annuk


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