Hi,
We did some work to support this use case in OpenJPA, but it's
certainly not the most-tested pathway through our codebase.
From your description, it sounds as though things work for you in some
cases (em.persist) but not others (em.merge). Is that correct?
If you could upload a test case that fails, that'd be a great start to
fixing the issue.
-Patrick
On 7/18/07, mikecool <[EMAIL PROTECTED]> wrote:
Hi,
Maybe you know, one of the entity implementation is composite of a hash set,
which stores key-value pairs.
It's a common design of Entity Bean in EJB2.x ages. Does any one use it in
OpenJPA? I am using it right now, and encounter an issue in entity cascade
manipulate. Here is the issue description.
Base.java : the super class of entities.
protected final Object getAttributeValue(String attributeName) {
return _values.get(attributeName);
}
protected final void setAttributeValue(String attributeName, Object
value)
{
_values.put(attributeName, value);
}
// To hold the {attributeName, value} pair of the value object.
private HashMap<String, Object> _values = new HashMap<String, Object>();
C.java extends Base.java : Entity C has a set of Entity D.
public void setDs(Set<D> ds) {
setCollection("Ds", ds);
}
@OneToMany(mappedBy = "c", fetch = FetchType.LAZY, cascade =
CascadeType.ALL)
public Set<D> getDs() {
return (Set<D>)getAttributeValue("Ds");
}
D.java extends Base.java as well.
The relationship between C and D is one-to-many. I use following code to
reproduce the issue.
C c = em.find(C.class, 1);
logger.debug(c.getDs().size());
D d = new D();
d.setC(c);
c.getDs().add(d);
em.merge(c);
After commit the transaction, you will find the new D instance was not
inserted into the database(there is no insert sql log as well). After you
add, em.persist(c). That new instance will be added!
Meanwhile, I wrote a couple of classes, which do not use a HashSet. I got
the expected result after merge is done.
Any thought? I can upload my code if it was required.
--
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--
Patrick Linskey
202 669 5907
