private Object unmarshall(PersistentEntity persistentEntity, Long id, Map<String, Object> data) {
log.debug("unmarshalling entity {}, props {}, {}", id, data);
EntityAccess entityAccess = new EntityAccess(persistentEntity, persistentEntity.newInstance());
entityAccess.setConversionService(persistentEntity.getMappingContext().getConversionService());
entityAccess.setIdentifier(id);
data.remove("__id__");
for (PersistentProperty property :
entityAccess.getPersistentEntity().getPersistentProperties()) {
String propertyName = property.getName();
if (property instanceof Simple) { // implicitly sets version property as well
entityAccess.setProperty(propertyName, data.remove(propertyName));
// } else if (property instanceof OneToOne) {
// log.error("property " + property.getName() + " is of type " +
// property.getClass().getSuperclass());
} else if (property instanceof ToOne) {
ToOne to = (ToOne) property;
CypherResult cypherResult =
getSession()
.getNativeInterface()
.execute(
CypherBuilder.findRelationshipEndpointIdsFor(to),
Collections.singletonMap("id", id));
Map<String, Object> row = IteratorUtil.singleOrNull(cypherResult);
if (row != null) {
Long endpointId = (Long) row.get("id");
entityAccess.setProperty(
propertyName,
getMappingContext()
.getProxyFactory()
.createProxy(session, to.getAssociatedEntity().getJavaClass(), endpointId));
}
} else if ((property instanceof OneToMany) || (property instanceof ManyToMany)) {
LazyEnititySet lazyEnititySet =
new LazyEnititySet(
entityAccess,
(Association) property,
getMappingContext().getProxyFactory(),
getSession());
entityAccess.setProperty(propertyName, lazyEnititySet);
} else {
throw new IllegalArgumentException(
"property $property.name is of type ${property.class.superclass}");
}
}
if (!data.isEmpty()) {
GroovyObject go = (GroovyObject) (entityAccess.getEntity());
go.setProperty(Neo4jGormEnhancer.UNDECLARED_PROPERTIES, data);
}
firePostLoadEvent(entityAccess.getPersistentEntity(), entityAccess);
return entityAccess.getEntity();
}
@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);
}
protected Object getCurrentVersion(final EntityAccess ea) {
Object currentVersion = ea.getProperty("version");
if (Number.class.isAssignableFrom(ea.getPropertyType("version"))) {
currentVersion =
currentVersion != null ? ((Number) currentVersion).longValue() : currentVersion;
}
return currentVersion;
}
RelationshipPendingInsert(
EntityAccess source, String relType, EntityAccess target, CypherEngine cypherEngine) {
super(source.getPersistentEntity(), -1l, source.getEntity(), source);
this.relType = relType;
this.target = target;
this.cypherEngine = cypherEngine;
// validateNonExistingRelationship("constructor");
}
@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);
}
}
public RelationshipPendingInsert(
EntityAccess parent,
Association association,
Collection<Serializable> pendingInserts,
GraphDatabaseService graphDatabaseService,
boolean isUpdate) {
super(parent.getPersistentEntity(), -1L, parent.getEntity(), parent);
this.graphDatabaseService = graphDatabaseService;
this.targetIdentifiers = pendingInserts;
this.association = association;
this.isUpdate = isUpdate;
}
@Override
protected void loadEmbeddedCollection(
EmbeddedCollection embeddedCollection,
EntityAccess ea,
Object embeddedInstances,
String propertyKey) {
Collection<Object> instances;
if (List.class.isAssignableFrom(embeddedCollection.getType())) {
instances = new ArrayList<Object>();
} else {
instances = new HashSet<Object>();
}
if (embeddedInstances instanceof List) {
List list = (List) embeddedInstances;
for (Object dbo : list) {
if (dbo instanceof BasicDBObject) {
BasicDBObject nativeEntry = (BasicDBObject) dbo;
Object instance =
createObjectFromEmbeddedNativeEntry(
embeddedCollection.getAssociatedEntity(), nativeEntry);
instances.add(instance);
}
}
}
ea.setProperty(embeddedCollection.getName(), instances);
}
@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);
}
@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();
}
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() + ")");
}
}
}
}
