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assigned primary key with the sequence generator

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cameronbraid

Post subject: assigned primary key with the sequence generator

Posted: Mon Nov 01, 2004 10:36 am

Beginner

Joined: Thu Aug 26, 2004 5:53 am
Posts: 37

I am using the sequence generator class.

I need to import data from an old database, during a migration phase, and I need to keep the primary keys the same on some tables.

I would like to not have to change the mappings from

generator class="sequence"
to
generator class="assigned"

to perform the migration.

I have tried setting the primary key column to the value that I wish to assign, and calling Session.save(), though the sequence generator is still used.

Is there an out of the box soloution for this ?

Could I use modified sequence generator that checks for an assigned pk ?

Thanks.

Cameron

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cameronbraid

Post subject:

Posted: Mon Nov 01, 2004 10:38 am

Beginner

Joined: Thu Aug 26, 2004 5:53 am
Posts: 37

just to clarif, when I said

Quote:

I have tried setting the primary key column to the value that I wish to assign

I meant

Quote:

I have tried setting the primary key property to the value that I wish to assign

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cameronbraid

Post subject:

Posted: Mon Nov 01, 2004 10:58 am

Beginner

Joined: Thu Aug 26, 2004 5:53 am
Posts: 37

I thikn I created a soloution.

I subclassed net.sf.hibernate.id.SequenceGenerator and overwrote :

Code:

    public Serializable generate(SessionImplementor session, Object object) throws SQLException, HibernateException {
        Serializable identifier = session.getSessionFactory().getClassMetadata(object.getClass()).getIdentifier(object);
        if (identifier != null) {
            return identifier;
        } else {
            return super.generate(session, object);
        }
    }

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