Hibernate session.contains( Class clazz, Serializable id )

Question

I want to be able to check whether a session contains an entity of a given class/identifier. I can't see a way to do this at the moment.

• contains() takes an entity object not class + key
• get() queries the database if the entity is not present which I don't want to do
• load() never returns null as a proxy is always created so I can't use this method

Is it possible to do the above with no side-effects/queries to DB?

Answer 1

This works:

public boolean isIdLoaded(Serializable id)
{
    for (Object key : getSession().getStatistics().getEntityKeys())
    {
        if (((EntityKey) key).getIdentifier().equals(id))
        {
            return true;
        }
    }

    return false;
}