@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 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);
}
}
private void persistAssociationsOfEntity(
PersistentEntity pe, EntityAccess entityAccess, boolean isUpdate) {
Object obj = entityAccess.getEntity();
DirtyCheckable dirtyCheckable = null;
if (obj instanceof DirtyCheckable) {
dirtyCheckable = (DirtyCheckable) obj;
}
for (PersistentProperty pp : pe.getAssociations()) {
if ((!isUpdate) || ((dirtyCheckable != null) && dirtyCheckable.hasChanged(pp.getName()))) {
Object propertyValue = entityAccess.getProperty(pp.getName());
if ((pp instanceof OneToMany) || (pp instanceof ManyToMany)) {
Association association = (Association) pp;
if (propertyValue != null) {
if (association.isBidirectional()) { // Populate other side of bidi
for (Object associatedObject : (Iterable) propertyValue) {
EntityAccess assocEntityAccess =
createEntityAccess(association.getAssociatedEntity(), associatedObject);
assocEntityAccess.setProperty(association.getReferencedPropertyName(), obj);
}
}
Iterable targets = (Iterable) propertyValue;
persistEntities(association.getAssociatedEntity(), targets);
boolean reversed = RelationshipUtils.useReversedMappingFor(association);
if (!reversed) {
if (!(propertyValue instanceof LazyEnititySet)) {
LazyEnititySet les =
new LazyEnititySet(
entityAccess,
association,
getMappingContext().getProxyFactory(),
getSession());
les.addAll(targets);
entityAccess.setProperty(association.getName(), les);
}
}
}
} else if (pp instanceof ToOne) {
if (propertyValue != null) {
ToOne to = (ToOne) pp;
if (to.isBidirectional()) { // Populate other side of bidi
EntityAccess assocEntityAccess =
createEntityAccess(to.getAssociatedEntity(), propertyValue);
if (to instanceof OneToOne) {
assocEntityAccess.setProperty(to.getReferencedPropertyName(), obj);
} else {
Collection collection =
(Collection) assocEntityAccess.getProperty(to.getReferencedPropertyName());
if (collection == null) {
collection = new ArrayList();
assocEntityAccess.setProperty(to.getReferencedPropertyName(), collection);
}
if (!collection.contains(obj)) {
collection.add(obj);
}
}
}
persistEntity(to.getAssociatedEntity(), propertyValue);
boolean reversed = RelationshipUtils.useReversedMappingFor(to);
String relType = RelationshipUtils.relationshipTypeUsedFor(to);
if (!reversed) {
getSession()
.addPendingInsert(
new RelationshipPendingInsert(
entityAccess,
relType,
new EntityAccess(to.getAssociatedEntity(), propertyValue),
getCypherEngine()));
}
}
} else {
throw new IllegalArgumentException(
"wtf don't know how to handle " + pp + "(" + pp.getClass() + ")");
}
}
}
}
