/** @since 3.1 */
@Override
public <T extends Persistent> T localObject(T objectFromAnotherContext) {
if (objectFromAnotherContext == null) {
throw new NullPointerException("Null object argument");
}
ObjectId id = objectFromAnotherContext.getObjectId();
// first look for the ID in the local GraphManager
synchronized (getGraphManager()) {
T localObject = (T) getGraphManager().getNode(id);
if (localObject != null) {
return localObject;
}
// create a hollow object, optimistically assuming that the ID we
// got from
// 'objectFromAnotherContext' is a valid ID either in the parent
// context or in
// the DB. This essentially defers possible FaultFailureExceptions.
ClassDescriptor descriptor = getEntityResolver().getClassDescriptor(id.getEntityName());
Persistent persistent = (Persistent) descriptor.createObject();
persistent.setObjectContext(this);
persistent.setObjectId(id);
persistent.setPersistenceState(PersistenceState.HOLLOW);
getGraphManager().registerNode(id, persistent);
return (T) persistent;
}
}
/**
* Returns a map key for a given to-many map relationship and a target object.
*
* @since 3.0
*/
protected Object getMapKey(String relationshipName, Object value) {
EntityResolver resolver = objectContext.getEntityResolver();
ClassDescriptor descriptor = resolver.getClassDescriptor(objectId.getEntityName());
if (descriptor == null) {
throw new IllegalStateException("DataObject's entity is unmapped, objectId: " + objectId);
}
PropertyDescriptor property = descriptor.getProperty(relationshipName);
if (property instanceof ToManyMapProperty) {
return ((ToManyMapProperty) property).getMapKey(value);
}
throw new IllegalArgumentException(
"Relationship '" + relationshipName + "' is not a to-many Map");
}
