I tryied your two tips and both didnt work. After tweaking the first one a bit,
it started to compile. But it still not doing what i want. My SQL/JPQL skills
are not very good so i probabbly did something wrong.
Here is my test class and entity classes.
------------ Test-----------------------
package entity;
|
| import java.util.ArrayList;
| import java.util.List;
|
| import javax.persistence.EntityManager;
| import javax.persistence.EntityManagerFactory;
| import javax.persistence.Persistence;
|
| public class ObjectTest {
|
| public static void main(String[] args) {
|
| EntityManagerFactory emf =
Persistence.createEntityManagerFactory("persistenceUnit");
| EntityManager em = emf.createEntityManager();
|
| ObjectA a1 = new ObjectA();
| ObjectA a2 = new ObjectA();
|
| ObjectB b1 = new ObjectB();
| ObjectB b2 = new ObjectB();
| ObjectB b3 = new ObjectB();
|
| a1.getList().add(b1);
| a1.getList().add(b2);
| a2.getList().add(b3);
|
| em.getTransaction().begin();
| em.persist(a1);
| em.persist(a2);
| em.getTransaction().commit();
|
| List<ObjectB> param = new ArrayList<ObjectB>();
| param.add(b1);
| param.add(b2);
|
| //"from ObjectA o where o.id in(select distinct b.fk_objectA from
ObjectB.fk_objectA b where b.id in :param)"
| //"from ObjectA o where o in(select distinct b from ObjectB b where b
in(:param))"
| List<ObjectA> list = em.createQuery("from ObjectA o where o
in(select b from ObjectB b where b in(:param))").setParameter("param",
param).getResultList();
| for (ObjectA t : list) {
| System.out.println(t);
| }
| }
|
| }
|
---------------- Entityies -----------------------
| package entity;
|
| import java.util.ArrayList;
| import java.util.List;
|
| import javax.persistence.CascadeType;
| import javax.persistence.Entity;
| import javax.persistence.GeneratedValue;
| import javax.persistence.GenerationType;
| import javax.persistence.Id;
| import javax.persistence.OneToMany;
|
| @Entity
| public class ObjectA {
|
| @Id
| @GeneratedValue(strategy = GenerationType.AUTO)
| private Long id;
|
| @OneToMany(mappedBy="objectA",cascade=CascadeType.ALL)
| private List<ObjectB> list = new ArrayList<ObjectB>();
|
| public Long getId() {
| return id;
| }
|
| public void setId(Long id) {
| this.id = id;
| }
|
| public List<ObjectB> getList() {
| return list;
| }
|
| public void setList(List<ObjectB> list) {
| this.list = list;
| }
|
| @Override
| public String toString() {
| String tmp = "id: "+id+"\nlist:\n";
| for(ObjectB t : list){
| tmp += "id:"+ t.getId() +"\n";
| }
| return tmp+="\n";
| }
|
| @Override
| public int hashCode() {
| final int prime = 31;
| int result = 1;
| result = prime * result + ((id == null) ? 0 : id.hashCode());
| return result;
| }
|
| @Override
| public boolean equals(Object obj) {
| if (this == obj)
| return true;
| if (obj == null)
| return false;
| if (getClass() != obj.getClass())
| return false;
| ObjectA other = (ObjectA) obj;
| if (id == null) {
| if (other.id != null)
| return false;
| } else if (!id.equals(other.id))
| return false;
| return true;
| }
|
| }
|
| package entity;
|
| import javax.persistence.Entity;
| import javax.persistence.GeneratedValue;
| import javax.persistence.GenerationType;
| import javax.persistence.Id;
| import javax.persistence.ManyToOne;
|
| @Entity
| public class ObjectB {
|
| @Id
| @GeneratedValue(strategy = GenerationType.AUTO)
| private Long id;
|
| @ManyToOne
| private ObjectA objectA;
|
| public Long getId() {
| return id;
| }
|
| public void setId(Long id) {
| this.id = id;
| }
|
| public void setObjectA(ObjectA objectA) {
| this.objectA = objectA;
| }
|
| public ObjectA getObjectA() {
| return objectA;
| }
|
| @Override
| public int hashCode() {
| final int prime = 31;
| int result = 1;
| result = prime * result + ((id == null) ? 0 : id.hashCode());
| return result;
| }
|
| @Override
| public boolean equals(Object obj) {
| if (this == obj)
| return true;
| if (obj == null)
| return false;
| if (getClass() != obj.getClass())
| return false;
| ObjectB other = (ObjectB) obj;
| if (id == null) {
| if (other.id != null)
| return false;
| } else if (!id.equals(other.id))
| return false;
| return true;
| }
|
| }
|
View the original post :
http://www.jboss.org/index.html?module=bb&op=viewtopic&p=4231141#4231141
Reply to the post :
http://www.jboss.org/index.html?module=bb&op=posting&mode=reply&p=4231141
_______________________________________________
jboss-user mailing list
jboss-user@lists.jboss.org
https://lists.jboss.org/mailman/listinfo/jboss-user
