Details
Critical Description
I have a Problem with my OpenJPA, and i think its a bug. The Getter/Proxy dont get all elements of a List.
Following the complete Testcase scenario:
For the test the following Settings are used. Cache have to be disabled, otherwise the test will pass because cached data.
persistence.xml::
...
<class>hellojpa.T1</class>
<class>hellojpa.T2</class>
<class>hellojpa.T3</class>
<properties>
<property name="openjpa.Log" value="SQL=TRACE"/>
<property name="openjpa.OrphanedKeyAction" value="log(Channel=Orphans, Level=TRACE)"/>
<property name="openjpa.Multithreaded" value="true" />
<property name="openjpa.InverseManager" value="true"/>
<property name="openjpa.LockManager" value="none"/>
<property name="openjpa.WriteLockLevel" value="none"/>
<property name="openjpa.Compatibility" value="QuotedNumbersInQueries=true,CopyOnDetach=true"/>
<property name="openjpa.DetachState" value="fetch-groups"/>
<property name="openjpa.jdbc.SynchronizeMappings" value="buildSchema" />
// Using Mysql but i think the prob is the query it selves 
<property name="openjpa.ConnectionURL" value="jdbc:mysql://localhost/jpatest" />
<property name="openjpa.ConnectionDriverName" value="com.mysql.jdbc.Driver" />
<property name="openjpa.ConnectionUserName" value="jpatest" />
<property name="openjpa.ConnectionPassword" value="XXXXXXXXX" />
</properties>
...
My Entityclasses:
@Entity
@Inheritance(strategy=InheritanceType.SINGLE_TABLE)
public class T1 {
@Id
@GeneratedValue
private Integer id;
public void setId(Integer id)
public Integer getId()
{ return id; }}
@Entity
public class T2 extends T1{
@OneToMany(fetch=FetchType.LAZY, cascade=CascadeType.PERSIST)
private List<T2> t2List;
public void setT1List(List<T2> t2List)
{ this.t2List = t2List; }public List<T2> getT2List()
{ return t2List; }}
@Entity
public class T3 extends T2 {
}
We have 3 Classes on the top of each other, at the middle a List with T2s.
My Testclasses:
private static void commit(){
em.getTransaction().begin();
em.getTransaction().commit();
}
// Create a TestEntity
T2 t2 = new T2();
em.persist(t2);
commit();
// Put a T2
t2.getT2List().add(new T2());
commit();
em.refresh(t2); // important to cause a new DB-Query.
assert(t2.getT2List().size()==1); // its OK
// Put a T3
t2.getT2List().add(new T3());
commit();
em.refresh(t2); // important to cause a new DB-Query.
assert(t2.getT2List().size()==2);// it FAILS
Database after the Test:
T1:
id -> DTYPE
51 -> T2
52 -> T2
53 -> T3
T1_T1
T2_ID -> T2_T2LIST
51 -> 52
51 -> 53
In the Database, there are both Elements correctly. I think the Problem is, that OpenJPA creates the following SQL-Queries:
SELECT t1.id, t1.DTYPE
FROM T1_T1 t0 INNER JOIN T1 t1 ON t0.T2_ID = t1.id
WHERE t0.T2_ID = ? AND *t1.DTYPE = ? *
[params=(int) 3601, (String) *T2*]
So the T3 Entities would be ignored. in this query. Did anyone have an Idea why jpa makes such a strange query with ignoring the subclasses of T2.
My other trys:
- Marks with @Nonpolymorphic(NonpolymorphicType.JOINABLE)
- Marks with @ElementNonpolymorphic(NonpolymorphicType.JOINABLE)
- Take Set instead of List
- The Scenario without a List and a Single Relation would pass and gets an query with t1.DTYPE IN (T2, T3). So its only with Lists.