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Typed query hints [message #1090993]

Tue, 20 August 2013 23:27

Roger Spall

Messages: 17
Registered: January 2013

Junior Member

I'm loving CriteriaBuilders and the Entity metadata for strongly typed queries...

Anyway, is there any way to use the same strong typing for specifying query hints?

For example, I want to add a batch read hint using a Typed field, so instead of:

               final TypedQuery<TechnicalPublicationType> readAllQuery = ydsusEntityManager.createQuery("select o from TechnicalPublicationType o", TechnicalPublicationType.class);
                readAllQuery.setHint("eclipselink.batch", "o.categories");

I want to do something like:

                final CriteriaBuilder builder = ydsusEntityManager.getCriteriaBuilder();
                final CriteriaQuery<TechnicalPublicationType> query = builder.createQuery(TechnicalPublicationType.class);
                final Root<TechnicalPublicationType> from = query.from(TechnicalPublicationType.class);
                final TypedQuery<TechnicalPublicationType> readAllQuery = ydsusEntityManager.createQuery(query);
                readAllQuery.setHint("eclipselink.batch", from.get(TechnicalPublicationType_.categories));

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