Hi tom,
What I found : I am creating 1-M relationship > CtrClaim -
CtrClaimDyr (pc0017) (mentioned below). So when I search on
CtrClaim, at object building phase it finds, 1-M relationship
(pc0017), then if fires ReadObjectQuery. Unfortunately the it tries
to get descriptor ReadObjectQuery.getDescriptor, it comes NULL
/**
* INTERNAL:
* Return the value of the reference attribute or a value
holder.
* Check whether the mapping's attribute should be optimized
through batch and joining.
*/
protected Object valueFromRowInternal(AbstractRecord row,
JoinedAttributeManager joinManager, ObjectBuildingQuery sourceQuery,
AbstractSession executionSession) throws DatabaseException {
// PERF: Direct variable access.
ReadQuery targetQuery = this.selectionQuery;
// Copy nested fetch group from the source query
if (targetQuery.isObjectLevelReadQuery() &&
targetQuery.getDescriptor().hasFetchGroupManager()) { NPE
One to many mapping are created as follows
DatabaseMapping oneToManyMapping(ClassDescriptor classDescriptor,
String attributeName, Class<?> attributeType) { classDescriptor>>ClassDescriptor
of CtrClaim, attributeName = pc0017 and
attributeType=CtrClaimDyr.class
OneToManyMapping _oneToManyMapping_ = new OneToManyMapping();
oneToManyMapping.setDescriptor(classDescriptor);
oneToManyMapping.setCascadeAll(true);
oneToManyMapping.useTransparentList();
VirtualAttributeAccessor virtualAttributeAccessor = new
VirtualAttributeAccessor();
virtualAttributeAccessor.setAttributeName(attributeName);
virtualAttributeAccessor.setGetMethodName("get");
virtualAttributeAccessor.setSetMethodName("set");
virtualAttributeAccessor.initializeAttributes(classDescriptor.getJavaClass());
oneToManyMapping.setAttributeAccessor(virtualAttributeAccessor);
oneToManyMapping.setAttributeName(attributeName);
oneToManyMapping.setReferenceClass(attributeType);
oneToManyMapping.addTargetForeignKeyFieldName("ID",
"BASE_TABLE_ID");
return oneToManyMapping;
}
On 26-07-2012 03:44 PM, Tom Ware wrote:
Hi
Gaurav,
I think Chris' quotes are a bit out of context here. We're now
further along - we are seeing the metadata refreshed.
Lets try to figure out which mapping is causing the problem and
why.
-Tom
On 26/07/2012 9:41 AM, gaurav malhotra wrote:
Hi Tom,
From the previous post by chris, I gathered that "We are
executing the query on
the session and not entityManager, which was pointed out is not
correct" Are we
doing something fundamentally wrong. It seems session - return
((EntityManagerImpl) em.getDelegate()).getActiveSession(); does
not contain
newly added mappings (OneToMany)
Chris says:-/
EclipseLink nightly testing verify that refreshMetadata does
work in the manner
Tom described. What are variables that might be causing you
problems are that I
see Spring is involved, and you are executing queries directly
on Sessions as
shown in the few lines below from a stack trace you sent in
earlier:
at
org.eclipse.persistence.internal.sessions.AbstractSession.executeQuery(AbstractSession.java:1449)
at
com.oracle.healthinsurance.support.domain.service.GenericSearchDAOImpl$16.doInJpa(GenericSearchDAOImpl.java:623)
at
com.oracle.healthinsurance.support.domain.service.GenericSearchDAOImpl$16.doInJpa(GenericSearchDAOImpl.java:1)
at
org.springframework.orm.jpa.JpaTemplate.execute(JpaTemplate.java:183)
I would have expected to just see an EclipseLink EntityManager
executing a
query, not a GenericSearchDAOImpl directly accessing/holding a
session or a
Spring JpaTemplate being involved. /
On 26-07-2012 03:26 PM, Tom Ware wrote:
Hi Gaurav,
I can't tell much about your query from the code you have sent
me. For the
most part, the required information exists in variables being
passed to the
code below and in methods that are not included in your
snippet.
What I can tell you is this:
- The exception is occurring on a mapping that is a
relationship (xToOne or
xToMany).
- It is occurring because the targetQuery for the mapping is
not properly setup
I suggest figuring out which entity is referenced by the
ReadAllQuery and then
figuring out which relationship mappings that object has. We
need to look at
those. I suggest starting with the relationships your
customizer is adding.
Lets try to isolate the exception to a single mapping and then
take a look at
the code that creates that mapping.
-Tom
On 26/07/2012 9:09 AM, gaurav malhotra wrote:
Hi Tom,
Now my question is regarding ReadAllQuery. Since we use
ReadAllQuery and serach
like below
Session session = getActiveSession(em); >>>>
ReadAllQuery query = new ReadAllQuery();
// Create _expression_ from Search Criteria use locale as set
in Context object
GenericSearchCriteria<?> gsc =
searchInput.getSearchCriteria();
gsc.setLocale(ohiBusinessContext.getLocale());
GenerateEclipseLinkExpression genExpression = new
GenerateEclipseLinkExpression(gsc,
dynamicSearchExpressionContextProvider);
ClassDescriptor cd =
session.getClassDescriptor(gsc.getPersistableClass());
// Setup how the query should be executed
setQueryExecutionConfiguration(searchInput, session, query,
gsc,
genExpression, cd);
_expression_ exp =
genExpression.buildSelectionCriteriaFromSearchCriteria(gsc.getSearchCriteria());
// ExampleObject
query.setReferenceClass(gsc.getPersistableClass());
if (exp != null) {
logger.debug("_expression_ is: {0}", exp);
query.setSelectionCriteria(exp);
}
NanoStopWatch swInner = new NanoStopWatch();
swInner.start();
// Execute the query
List<Object> results =
CastUtil.castToList(session.executeQuery(query));
- ------- - ------- - ------- - ------- - ------- - -------
- ------- - -------
- ------- - ------- - ------- - ------- - ------- - -------
- ------- - -------
_*Search Example*_ - To the entity CtrClaimDomain, new
mappings have weaved.
With the call _*nameOfField,ctrClaim.get(nameOfField) *_/I
am trying to fetch
them/
List<CtrClaim> ctrClaims = new
SearchBuilder(CtrClaim.class).execute();
for (CtrClaim ctrClaim : ctrClaims) {
Map<String, Object> dynRecs1 =
ctrClaim.getDynamicRecords();
if (dynRecs1.size() > 0) {
for (Map.Entry<String, Object> entry :
dynRecs1.entrySet()) {
String nameOfField = entry.getKey();
System.err.println(String.format("Name=%s Value=%s"_*,
nameOfField,ctrClaim.get(nameOfField)*_));
}
}
}
}
I am getting the following exception
java.lang.NullPointerException
at org.eclipse.persistence.mappings.ForeignReferenceMapping
.valueFromRowInternal(ForeignReferenceMapping.java:2019)
at
org.eclipse.persistence.mappings.ForeignReferenceMapping.valueFromRow(ForeignReferenceMapping.java:1987)
at
org.eclipse.persistence.mappings.ForeignReferenceMapping.buildCloneFromRow(ForeignReferenceMapping.java:276)
at
org.eclipse.persistence.internal.descriptors.ObjectBuilder.buildAttributesIntoWorkingCopyClone(ObjectBuilder.java:1548)
at
org.eclipse.persistence.internal.descriptors.ObjectBuilder.buildWorkingCopyCloneFromRow(ObjectBuilder.java:1694)
at
org.eclipse.persistence.internal.descriptors.ObjectBuilder.buildObjectInUnitOfWork(ObjectBuilder.java:664)
at
org.eclipse.persistence.internal.descriptors.ObjectBuilder.buildObject(ObjectBuilder.java:601)
at
org.eclipse.persistence.internal.descriptors.ObjectBuilder.buildObject(ObjectBuilder.java:560)
at
org.eclipse.persistence.queries.ObjectLevelReadQuery.buildObject(ObjectLevelReadQuery.java:717)
at
org.eclipse.persistence.queries.ReadAllQuery.registerResultInUnitOfWork(ReadAllQuery.java:769)
at
org.eclipse.persistence.queries.ReadAllQuery.executeObjectLevelReadQuery(ReadAllQuery.java:433)
at
org.eclipse.persistence.queries.ObjectLevelReadQuery.executeDatabaseQuery(ObjectLevelReadQuery.java:1081)
at
org.eclipse.persistence.queries.DatabaseQuery.execute(DatabaseQuery.java:844)
at
org.eclipse.persistence.queries.ObjectLevelReadQuery.execute(ObjectLevelReadQuery.java:1040)
at
org.eclipse.persistence.queries.ReadAllQuery.execute(ReadAllQuery.java:392)
at
org.eclipse.persistence.queries.ObjectLevelReadQuery.executeInUnitOfWork(ObjectLevelReadQuery.java:1128)
at
org.eclipse.persistence.internal.sessions.UnitOfWorkImpl.internalExecuteQuery(UnitOfWorkImpl.java:2871)
at
org.eclipse.persistence.internal.sessions.AbstractSession.executeQuery(AbstractSession.java:1516)
at
org.eclipse.persistence.internal.sessions.AbstractSession.executeQuery(AbstractSession.java:1498)
at
org.eclipse.persistence.internal.sessions.AbstractSession.executeQuery(AbstractSession.java:1449)
at
com.oracle.healthinsurance.support.domain.service.GenericSearchDAOImpl$16.doInJpa(GenericSearchDAOImpl.java:623)
at
com.oracle.healthinsurance.support.domain.service.GenericSearchDAOImpl$16.doInJpa(GenericSearchDAOImpl.java:1)
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