@Override
protected void deleteEntity(PersistentEntity pe, Object obj) {
EntityAccess entityAccess = createEntityAccess(pe, obj);
if (cancelDelete(pe, entityAccess)) {
return;
}
for (Association association : pe.getAssociations()) {
if (association.isOwningSide() && association.doesCascade(CascadeType.REMOVE)) {
log.debug("cascading delete for property " + association.getName());
GraphPersistentEntity otherPersistentEntity =
(GraphPersistentEntity) association.getAssociatedEntity();
Object otherSideValue = entityAccess.getProperty(association.getName());
if (association instanceof ToOne) {
deleteEntity(otherPersistentEntity, otherSideValue);
} else {
deleteEntities(otherPersistentEntity, (Iterable) otherSideValue);
}
}
}
getCypherEngine()
.execute(
String.format(
"MATCH (n:%s) WHERE n.__id__={id} OPTIONAL MATCH (n)-[r]-() DELETE r,n",
((GraphPersistentEntity) pe).getLabel()),
Collections.singletonMap("id", entityAccess.getIdentifier()));
firePostDeleteEvent(pe, entityAccess);
}
@Override
protected void setManyToMany(
PersistentEntity persistentEntity,
Object obj,
DBObject nativeEntry,
ManyToMany manyToMany,
Collection associatedObjects,
Map<Association, List<Serializable>> toManyKeys) {
List ids = new ArrayList();
if (associatedObjects != null) {
for (Object o : associatedObjects) {
if (o == null) {
ids.add(null);
} else {
PersistentEntity childPersistentEntity =
getMappingContext().getPersistentEntity(o.getClass().getName());
EntityAccess entityAccess = createEntityAccess(childPersistentEntity, o);
ids.add(entityAccess.getIdentifier());
}
}
}
nativeEntry.put(manyToMany.getName() + "_$$manyToManyIds", ids);
}
@Override
protected void deleteEntities(
PersistentEntity pe, @SuppressWarnings("rawtypes") Iterable objects) {
List<EntityAccess> entityAccesses = new ArrayList<EntityAccess>();
List<Object> ids = new ArrayList<Object>();
Map<PersistentEntity, Collection<Object>> cascades =
new HashMap<PersistentEntity, Collection<Object>>();
for (Object obj : objects) {
EntityAccess entityAccess = createEntityAccess(pe, obj);
if (cancelDelete(pe, entityAccess)) {
return;
}
entityAccesses.add(entityAccess);
ids.add(entityAccess.getIdentifier());
// populate cascades
for (Association association : pe.getAssociations()) {
Object property = entityAccess.getProperty(association.getName());
if (association.isOwningSide()
&& association.doesCascade(CascadeType.REMOVE)
&& (property != null)) {
PersistentEntity associatedEntity = association.getAssociatedEntity();
Collection<Object> cascadesForPersistentEntity = cascades.get(associatedEntity);
if (cascadesForPersistentEntity == null) {
cascadesForPersistentEntity = new ArrayList<Object>();
cascades.put(associatedEntity, cascadesForPersistentEntity);
}
if (association instanceof ToOne) {
cascadesForPersistentEntity.add(property);
} else {
cascadesForPersistentEntity.addAll((Collection<?>) property);
}
}
}
}
for (Map.Entry<PersistentEntity, Collection<Object>> entry : cascades.entrySet()) {
deleteEntities(entry.getKey(), entry.getValue());
}
getCypherEngine()
.execute(
String.format(
"MATCH (n:%s) WHERE n.__id__ in {ids} OPTIONAL MATCH (n)-[r]-() DELETE r,n",
((GraphPersistentEntity) pe).getLabel()),
Collections.singletonMap("ids", ids));
for (EntityAccess entityAccess : entityAccesses) {
firePostDeleteEvent(pe, entityAccess);
}
}
@Override
protected Serializable persistEntity(PersistentEntity pe, Object obj) {
if ((obj == null) || (getSession().containsPersistingInstance(obj))) {
return null;
}
EntityAccess entityAccess = createEntityAccess(pe, obj);
if (getMappingContext().getProxyFactory().isProxy(obj)) {
return (Serializable) entityAccess.getIdentifier();
}
getSession().addPersistingInstance(obj);
// cancel operation if vetoed
boolean isUpdate = entityAccess.getIdentifier() != null;
if (isUpdate) {
if (cancelUpdate(pe, entityAccess)) {
return null;
}
getSession()
.addPendingUpdate(
new NodePendingUpdate(entityAccess, getCypherEngine(), getMappingContext()));
persistAssociationsOfEntity(pe, entityAccess, true);
firePostUpdateEvent(pe, entityAccess);
} else {
if (cancelInsert(pe, entityAccess)) {
return null;
}
getSession()
.addPendingInsert(
new NodePendingInsert(
getSession().getDatastore().nextIdForType(pe),
entityAccess,
getCypherEngine(),
getMappingContext()));
persistAssociationsOfEntity(pe, entityAccess, false);
firePostInsertEvent(pe, entityAccess);
}
return (Serializable) entityAccess.getIdentifier();
}
@Override
public void run() {
// validateNonExistingRelationship("execution");
List params = new ArrayList();
params.add(getEntityAccess().getIdentifier());
params.add(target.getIdentifier());
String labelsFrom = ((GraphPersistentEntity) getEntity()).getLabelsAsString();
String labelsTo = ((GraphPersistentEntity) target.getPersistentEntity()).getLabelsAsString();
String cypher =
String.format(
"MATCH (from%s {__id__:{1}}), (to%s {__id__:{2}}) MERGE (from)-[:%s]->(to)",
labelsFrom, labelsTo, relType);
cypherEngine.execute(cypher, params);
}
@Override
public boolean isDirty(Object instance, Object entry) {
if (super.isDirty(instance, entry)) {
return true;
}
DBObject dbo = (DBObject) entry;
PersistentEntity entity = getPersistentEntity();
EntityAccess entityAccess = createEntityAccess(entity, instance, dbo);
DBObject cached =
(DBObject)
((SessionImplementor<?>) getSession())
.getCachedEntry(entity, (Serializable) entityAccess.getIdentifier(), true);
return !dbo.equals(cached);
}
