@Override
public void nodeRemoved(Object nodeId) {
ObjectId id = (ObjectId) nodeId;
final MutableObjectChange objectChangeSet = changeSet.getOrCreate(id, ObjectChangeType.DELETE);
// TODO: rewrite with SelectById query after Cayenne upgrade
ObjectIdQuery query = new ObjectIdQuery(id, true, ObjectIdQuery.CACHE);
QueryResponse result = channel.onQuery(null, query);
@SuppressWarnings("unchecked")
List<DataRow> rows = result.firstList();
if (rows.isEmpty()) {
LOGGER.warn(
"No DB snapshot for object to be deleted, no changes will be recorded. ID: " + id);
return;
}
final DataRow row = rows.get(0);
ClassDescriptor descriptor = channel.getEntityResolver().getClassDescriptor(id.getEntityName());
final PostCommitEntity entity = entityFactory.getEntity(id);
descriptor.visitProperties(
new PropertyVisitor() {
@Override
public boolean visitAttribute(AttributeProperty property) {
if (!entity.isIncluded(property.getName())) {
return true;
}
Object value;
if (entity.isConfidential(property.getName())) {
value = Confidential.getInstance();
} else {
String key = property.getAttribute().getDbAttributeName();
value = row.get(key);
}
if (value != null) {
objectChangeSet.attributeChanged(property.getName(), value, null);
}
return true;
}
@Override
public boolean visitToOne(ToOneProperty property) {
// TODO record FK changes?
return true;
}
@Override
public boolean visitToMany(ToManyProperty property) {
return true;
}
});
}
/** @since 3.1 */
@Override
protected void attachToChannel(DataChannel channel) {
super.attachToChannel(channel);
if (mergeHandler != null) {
mergeHandler.setActive(false);
mergeHandler = null;
}
EventManager eventManager = channel.getEventManager();
if (eventManager != null) {
mergeHandler = new DataContextMergeHandler(this);
// listen to our channel events...
// note that we must reset listener on channel switch, as there is
// no
// guarantee that a new channel uses the same EventManager.
EventUtil.listenForChannelEvents(channel, mergeHandler);
}
if (!usingSharedSnaphsotCache && getObjectStore() != null) {
DataRowStore cache = getObjectStore().getDataRowCache();
if (cache != null) {
cache.setEventManager(eventManager);
}
}
}