Hello,
I am currently porting our application from OJB 1.0.0rc4 to OJB 1.0.0
A new problem has been introduced since then in
MtoNCollectionPrefetcher.associateBatched,
as Jakob points out in this source's javadoc:
BRJ: There is a potential problem with the type of the pks used to build the
Identities.
* When creating an Identity for the owner, the type of pk is defined by the
instvars
* representing the pk. When creating the Identity based on the
mToNImplementor the
* type of the pk is defined by the jdbc-type of field-descriptor of the
referenced class.
* This type mismatch results in Identities not being equal. <br>
* Integer[] {10,20,30} is not equal Long[] {10,20,30}
In my application, I use primary keys of type Long mapped to BigDecimal.
The issue then results in the stacktrace below.
java.lang.NullPointerException
at
org.apache.ojb.broker.accesslayer.MtoNCollectionPrefetcher.associateBatched(
MtoNCollectionPrefetcher.java:408)
at
org.apache.ojb.broker.accesslayer.MtoNCollectionPrefetcher.prefetchRelations
hip(MtoNCollectionPrefetcher.java:94)
at
org.apache.ojb.broker.core.QueryReferenceBroker$PBPrefetchingListener.prefet
ch(QueryReferenceBroker.java:873)
at
org.apache.ojb.broker.core.QueryReferenceBroker$PBCollectionProxyListener.be
foreLoading(QueryReferenceBroker.java:930)
at
org.apache.ojb.broker.core.proxy.CollectionProxyDefaultImpl.beforeLoading(Co
llectionProxyDefaultImpl.java:182)
at
org.apache.ojb.broker.core.proxy.CollectionProxyDefaultImpl.getData(Collecti
onProxyDefaultImpl.java:425)
at
org.apache.ojb.broker.core.proxy.CollectionProxyDefaultImpl.toArray(Collecti
onProxyDefaultImpl.java:260)
at
de.ppi.neuwerk.repman.persistent.ojb.AuditOjb.getCreatedNodes(AuditOjb.java:
157)
With some effort, I tried also current CVS head, and the problem is still
there.
Any ideas for a workaround? I wonder if anybody else has this problem?!
I cannot image that we are the only ones who have primary-key fields with
FieldConversion
and who use m:n-Collections.
Best regards,
Olli
P.S. I am committer myself, and I apologize for my long absence from active
participation.
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