I put together this utility method. It seems to work:
public static <T extends Persistent> T faultForPrimaryKeyValue(
Class<T> type, Object pkValue, ObjectContext context) {
if (type == null || pkValue == null || context == null) {
throw new IllegalArgumentException("type, pkValue, and
context must not be null");
}
EntityResolver resolver = context.getEntityResolver();
ObjEntity objEntity = resolver.getObjEntity(type);
if (objEntity == null) {
throw new IllegalArgumentException("No ObjEntity found
for class " + type.getName());
}
DbEntity dbEntity = objEntity.getDbEntity();
if (dbEntity == null) {
throw new IllegalStateException("No DbEntity mapped for
ObjEntity " + objEntity.getName());
}
if (dbEntity.getPrimaryKeys().size() != 1) {
throw new IllegalStateException(
"Entity " + dbEntity.getName() + " must
have exactly one primary key column");
}
// Build the ObjectId
DbAttribute pkAttr =
dbEntity.getPrimaryKeys().iterator().next();
String pkName = pkAttr.getName();
String entityName = objEntity.getName();
ObjectId objectId = ObjectId.of(entityName, pkName, pkValue);
// Check if object already registered
Persistent existing = (Persistent)
context.getGraphManager().getNode(objectId);
if (existing != null) {
@SuppressWarnings("unchecked")
T casted = (T) existing;
return casted;
}
// Create a new hollow (fault) object
ClassDescriptor descriptor =
resolver.getClassDescriptor(entityName);
Persistent obj = (Persistent) descriptor.createObject();
obj.setObjectContext(context);
obj.setObjectId(objectId);
obj.setPersistenceState(PersistenceState.HOLLOW);
context.getGraphManager().registerNode(objectId, obj);
@SuppressWarnings("unchecked")
T casted = (T) obj;
return casted;
}
> On Oct 25, 2025, at 4:34 PM, Ricardo Parada <[email protected]> wrote:
>
>
> Awesome, thank you for that code Andrus.
>
> Ricardo Parada
>
>
>
>>
>> On Oct 25, 2025, at 12:16 PM, Andrus Adamchik <[email protected]> wrote:
>>
>> Hi Ricardo,
>>
>> A rough equivalent used by Cayenne internally is this:
>>
>> ObjectId oid = ObjectId.of(entityName, "PK_COL_NAME", id);
>> ClassDescriptor descriptor =
>> context.getEntityResolver().getClassDescriptor(entityName);
>>
>> Persistent o = (Persistent) descriptor.createObject();
>> o.setObjectContext(context);
>> o.setObjectId(oid);
>> o.setPersistenceState(PersistenceState.HOLLOW);
>>
>> context.getGraphManager().registerNode(oid, o);
>>
>> Thanks,
>> Andrus
>>
>>
>>> On Oct 24, 2025, at 9:05 AM, Ricardo Parada <[email protected]> wrote:
>>> Good morning,
>>> I’m looking for the equivalent of the following EOF code:
>>> var obj = EOUtilities.faultWithPrimaryKeyValue(editingContext, entityName,
>>> id);
>>> What I have so far is:
>>> var objClass =
>>> oc.getEntityResolver().getClassDescriptor(objEntityName).getObjectClass();
>>> var obj = SelectById.query(objClass, id)
>>> .localCache()
>>> .selectOne(oc);
>>> But it seems to fetch the object the first time even though the object
>>> already exists in the object context.
>>> Thanks in advance,
>>> Ricardo Parada
