one-to-many detached Criteria parent table fetch based on child table - parent-child

Question

i have one problem in one-to-many mapping using hibernate.
i have 2 classes, Person and Address. Person is mapped by Address ( one-to-many)
i want get all Person where Address = "xxxx";. how to prepare this query using DetachedCriteria . below i have added a piece of code from my dao class. please help me to complete it.
Person.java
#Entity
#Table(name="PERSON")
public class Person {
#Id
#GeneratedValue(strategy = GenerationType.AUTO)
#Column(name="personId")
private int id;
#Column(name="personName")
private String name;
#OneToMany(cascade =CascadeType.ALL,fetch = FetchType.LAZY)
#JoinColumn(name="personId")
private Set <Address> addresses;
}
Address.java
#Entity
#Table(name = "ADDRESS")
public class Address {
#Id
#GeneratedValue(strategy = GenerationType.AUTO)
#Column(name = "addressId")
private int id;
#Column(name = "address",nullable=false)
private String address;
#ManyToOne(cascade =CascadeType.ALL)
#JoinColumn(name="personId",nullable=false)
private Person person;
}
My DAO
DetachedCriteria c = DetachedCriteria.forClass(Person.class);
List<Person> persnList =null;
/*here i want add some restriction for
fetch all person whose address = "abcd"
here address is collection. how to set restriction in it ?.
*/
persnList = getHibernateTemplate().findByCriteria(c);
System.out.println(persnList.size());
select * from person where Address.address = "xxxx"; how to implement this using DetachedCriteria ?

Answer 1

DetachedCriteria c = DetachedCriteria.forClass(Person.class);
List<Person> persnList =null;
DetachedCriteria addrCrit = c.createCriteria("addresses").addRestriction(Restrictions.eq("address","abcd"));
addrCrit.setResultTransformer(Criteria.DISTINCT_ROOT_ENTITY);
persnList = getHibernateTemplate().findByCriteria(c);
System.out.println(persnList.size());
Creating inner criteria on main criteria which will do an equivalent inner join.