如何将休眠子条件限制应用于Java列表？

Question

class A{
     String name;
     List<B> b;
     boolean ra;
}

 class B{
    boolean rb;  
    int a;
        }

i want to add child criteria that everything from List of b will come whhose value of boolean rb is false in class b.

   Criteria criteria = sessionFactory.getCurrentSession().createCriteria(A.class,"a");
    criteria.add(Restrictions.like("a.name","hi", MatchMode.ANYWHERE);

how add this child criteria that will get some elements from list of b which contain value of rb is false?

Answer 1

You can use aliases as described in the Hibernate documentation

List cats = sess.createCriteria(Cat.class)
    .createAlias("kittens", "kt")
    .createAlias("mate", "mt")
    .add( Restrictions.eqProperty("kt.name", "mt.name") )
    .list();

So in your case you want to create alias for ´b´.

Criteria criteria = sessionFactory.getCurrentSession().createCriteria(A.class,"a");
    criteria.createAlias('b', 'b');
    criteria.add(Restrictions.eq('b.rb', false));
    ...

https://docs.jboss.org/hibernate/orm/3.3/reference/en/html/querycriteria.html