/**
* INTERNAL: Return the value of the field from the row or a value holder on the query to obtain
* the object. Check for batch + aggregation reading.
*/
@Override
public Object valueFromRow(
AbstractRecord row,
JoinedAttributeManager joinManager,
ObjectBuildingQuery sourceQuery,
AbstractSession executionSession)
throws DatabaseException {
// If any field in the foreign key is null then it means there are no referenced objects
for (Enumeration enumeration = getFields().elements(); enumeration.hasMoreElements(); ) {
DatabaseField field = (DatabaseField) enumeration.nextElement();
if (row.get(field) == null) {
return getIndirectionPolicy().nullValueFromRow();
}
}
if (getTypeField() != null) {
// If the query used batched reading, return a special value holder,
// or retrieve the object from the query property.
if (sourceQuery.isReadAllQuery()
&& (((ReadAllQuery) sourceQuery).isAttributeBatchRead(getDescriptor(), getAttributeName())
|| shouldUseBatchReading())) {
return batchedValueFromRow(row, ((ReadAllQuery) sourceQuery));
}
// If the field is empty we cannot load the object because we do not know what class it will
// be
if (row.get(getTypeField()) == null) {
return getIndirectionPolicy().nullValueFromRow();
}
Class implementerClass =
(Class) getImplementorForType(row.get(getTypeField()), executionSession);
ReadObjectQuery query = (ReadObjectQuery) getSelectionQuery().clone();
query.setReferenceClass(implementerClass);
query.setSelectionCriteria(getSelectionCriteria());
query.setDescriptor(null); // Must set to null so the right descriptor is used
if (sourceQuery.isObjectLevelReadQuery()
&& (sourceQuery.shouldCascadeAllParts()
|| (sourceQuery.shouldCascadePrivateParts() && isPrivateOwned())
|| (sourceQuery.shouldCascadeByMapping() && this.cascadeRefresh))) {
query.setShouldRefreshIdentityMapResult(sourceQuery.shouldRefreshIdentityMapResult());
query.setCascadePolicy(sourceQuery.getCascadePolicy());
query.setShouldMaintainCache(sourceQuery.shouldMaintainCache());
// For flashback.
if (((ObjectLevelReadQuery) sourceQuery).hasAsOfClause()) {
query.setAsOfClause(((ObjectLevelReadQuery) sourceQuery).getAsOfClause());
}
// CR #4365 - used to prevent infinit recursion on refresh object cascade all
query.setQueryId(sourceQuery.getQueryId());
}
return getIndirectionPolicy().valueFromQuery(query, row, executionSession);
} else {
return super.valueFromRow(row, joinManager, sourceQuery, executionSession);
}
}
public void executeUntilStopped() {
Session session =
ConcurrentTestRefreshWithOptimisticLocking.server.serverSession.acquireClientSession();
DeadLockAddress address =
(DeadLockAddress)
session.readObject(
org.eclipse.persistence.testing.tests.clientserver.DeadLockAddress.class);
DeadLockEmployee employee = (DeadLockEmployee) session.readObject(DeadLockEmployee.class);
ReadObjectQuery query;
if ((this.index % 2) != 0) {
query = new ReadObjectQuery(address);
query.refreshIdentityMapResult();
query.setCascadePolicy(DatabaseQuery.CascadeAllParts);
} else {
query = new ReadObjectQuery(employee);
query.refreshIdentityMapResult();
query.setCascadePolicy(DatabaseQuery.CascadeAllParts);
}
while (ConcurrentTestRefreshWithOptimisticLocking.execute) {
ConcurrentTestRefreshWithOptimisticLocking.timeList[this.index] = System.currentTimeMillis();
session.executeQuery(query);
}
// System.out.println("BeingShutDown");
}