/// <summary>
/// Finish the process of collection-loading for this bound result set. Mainly this
/// involves cleaning up resources and notifying the collections that loading is
/// complete.
/// </summary>
/// <param name="persister">The persister for which to complete loading. </param>
public void EndLoadingCollections(ICollectionPersister persister)
{
if (!loadContexts.HasLoadingCollectionEntries || (localLoadingCollectionKeys.Count == 0))
{
return;
}
// in an effort to avoid concurrent-modification-exceptions (from
// potential recursive calls back through here as a result of the
// eventual call to PersistentCollection#endRead), we scan the
// internal loadingCollections map for matches and store those matches
// in a temp collection. the temp collection is then used to "drive"
// the #endRead processing.
List<CollectionKey> toRemove = new List<CollectionKey>();
List<LoadingCollectionEntry> matches =new List<LoadingCollectionEntry>();
foreach (CollectionKey collectionKey in localLoadingCollectionKeys)
{
ISessionImplementor session = LoadContext.PersistenceContext.Session;
LoadingCollectionEntry lce = loadContexts.LocateLoadingCollectionEntry(collectionKey);
if (lce == null)
{
log.Warn("In CollectionLoadContext#endLoadingCollections, localLoadingCollectionKeys contained [" + collectionKey + "], but no LoadingCollectionEntry was found in loadContexts");
}
else if (lce.ResultSet == resultSet && lce.Persister == persister)
{
matches.Add(lce);
if (lce.Collection.Owner == null)
{
session.PersistenceContext.AddUnownedCollection(new CollectionKey(persister, lce.Key, session.EntityMode),
lce.Collection);
}
if (log.IsDebugEnabled)
{
log.Debug("removing collection load entry [" + lce + "]");
}
// todo : i'd much rather have this done from #endLoadingCollection(CollectionPersister,LoadingCollectionEntry)...
loadContexts.UnregisterLoadingCollectionXRef(collectionKey);
toRemove.Add(collectionKey);
}
}
localLoadingCollectionKeys.RemoveAll(toRemove);
EndLoadingCollections(persister, matches);
if ((localLoadingCollectionKeys.Count == 0))
{
// todo : hack!!!
// NOTE : here we cleanup the load context when we have no more local
// LCE entries. This "works" for the time being because really
// only the collection load contexts are implemented. Long term,
// this cleanup should become part of the "close result set"
// processing from the (sandbox/jdbc) jdbc-container code.
loadContexts.Cleanup(resultSet);
}
}
public override ICollection GetSnapshot(ICollectionPersister persister)
{
EntityMode entityMode = Session.EntityMode;
List<object> clonedList = new List<object>(list.Count);
foreach (object current in list)
{
object deepCopy = persister.ElementType.DeepCopy(current, entityMode, persister.Factory);
clonedList.Add(deepCopy);
}
return clonedList;
}
public override IAuditWorkUnit Dispatch(IWorkUnitMergeVisitor first)
{
if (first is PersistentCollectionChangeWorkUnit) {
PersistentCollectionChangeWorkUnit original = (PersistentCollectionChangeWorkUnit) first;
// Merging the collection changes in both work units.
// First building a map from the ids of the collection-entry-entities from the "second" collection changes,
// to the PCCD objects. That way, we will be later able to check if an "original" collection change
// should be added, or if it is overshadowed by a new one.
IDictionary<Object, PersistentCollectionChangeData> newChangesIdMap = new Dictionary<Object, PersistentCollectionChangeData>();
foreach (PersistentCollectionChangeData persistentCollectionChangeData in getCollectionChanges()) {
newChangesIdMap.Add(
getOriginalId(persistentCollectionChangeData),
persistentCollectionChangeData);
}
// This will be the list with the resulting (merged) changes.
List<PersistentCollectionChangeData> mergedChanges = new List<PersistentCollectionChangeData>();
// Including only those original changes, which are not overshadowed by new ones.
foreach (PersistentCollectionChangeData originalCollectionChangeData in original.getCollectionChanges()) {
if (!newChangesIdMap.ContainsKey(getOriginalId(originalCollectionChangeData))) {
mergedChanges.Add(originalCollectionChangeData);
}
}
// Finally adding all of the new changes to the end of the list
mergedChanges = (List<PersistentCollectionChangeData>)mergedChanges.Concat(getCollectionChanges());
return new PersistentCollectionChangeWorkUnit(sessionImplementor, EntityName, verCfg, EntityId, mergedChanges,
ReferencingPropertyName);
} else {
throw new Exception("Trying to merge a " + first + " with a PersitentCollectionChangeWorkUnit. " +
"This is not really possible.");
}
}
public override string ToLoggableString(object value, ISessionFactoryImplementor factory)
{
if (value == null)
{
return "null";
}
Array array = (Array) value;
int length = array.Length;
IList list = new List<object>(length);
IType elemType = GetElementType(factory);
for (int i = 0; i < length; i++)
{
list.Add(elemType.ToLoggableString(array.GetValue(i), factory));
}
return CollectionPrinter.ToString(list);
}
/// <summary>
/// Adds an association and extracts the aliases the association's 'with clause' is dependent on
/// </summary>
private void AddAssociation(string subalias, OuterJoinableAssociation association)
{
subalias = subalias.ToLower();
var dependencies = new List<string>();
var on = association.On.ToString();
if (!String.IsNullOrEmpty(on))
{
foreach (Match match in aliasRegex.Matches(on))
{
string alias = match.Groups[1].Value;
if (alias == subalias) continue;
dependencies.Add(alias.ToLower());
}
}
_dependentAliases.Add(new DependentAlias
{
Alias = subalias,
DependsOn = dependencies.ToArray()
});
associations.Add(association);
}
private IList DoQuery(ISessionImplementor session, QueryParameters queryParameters, bool returnProxies)
{
RowSelection selection = queryParameters.RowSelection;
int maxRows = HasMaxRows(selection) ? selection.MaxRows : int.MaxValue;
int entitySpan = EntityPersisters.Length;
List<object> hydratedObjects = entitySpan == 0 ? null : new List<object>(entitySpan * 10);
IDbCommand st = PrepareQueryCommand(queryParameters, false, session);
IDataReader rs = GetResultSet(st, queryParameters.HasAutoDiscoverScalarTypes, queryParameters.Callable, selection,
session);
// would be great to move all this below here into another method that could also be used
// from the new scrolling stuff.
//
// Would need to change the way the max-row stuff is handled (i.e. behind an interface) so
// that I could do the control breaking at the means to know when to stop
LockMode[] lockModeArray = GetLockModes(queryParameters.LockModes);
EntityKey optionalObjectKey = GetOptionalObjectKey(queryParameters, session);
bool createSubselects = IsSubselectLoadingEnabled;
List<EntityKey[]> subselectResultKeys = createSubselects ? new List<EntityKey[]>() : null;
IList results = new List<object>();
try
{
HandleEmptyCollections(queryParameters.CollectionKeys, rs, session);
EntityKey[] keys = new EntityKey[entitySpan]; // we can reuse it each time
if (log.IsDebugEnabled)
{
log.Debug("processing result set");
}
int count;
for (count = 0; count < maxRows && rs.Read(); count++)
{
if (log.IsDebugEnabled)
{
log.Debug("result set row: " + count);
}
object result = GetRowFromResultSet(rs, session, queryParameters, lockModeArray, optionalObjectKey, hydratedObjects,
keys, returnProxies);
results.Add(result);
if (createSubselects)
{
subselectResultKeys.Add(keys);
keys = new EntityKey[entitySpan]; //can't reuse in this case
}
}
if (log.IsDebugEnabled)
{
log.Debug(string.Format("done processing result set ({0} rows)", count));
}
}
catch (Exception e)
{
e.Data["actual-sql-query"] = st.CommandText;
throw;
}
finally
{
session.Batcher.CloseCommand(st, rs);
}
InitializeEntitiesAndCollections(hydratedObjects, rs, session, queryParameters.ReadOnly);
if (createSubselects)
{
CreateSubselects(subselectResultKeys, queryParameters, session);
}
return results;
}
public override IEnumerable GetDeletes(ICollectionPersister persister, bool indexIsFormula)
{
IList deletes = new List<object>();
Array sn = (Array) GetSnapshot();
int snSize = sn.Length;
int arraySize = array.Length;
int end;
if (snSize > arraySize)
{
for (int i = arraySize; i < snSize; i++)
{
deletes.Add(i);
}
end = arraySize;
}
else
{
end = snSize;
}
for (int i = 0; i < end; i++)
{
if (array.GetValue(i) == null && sn.GetValue(i) != null)
{
deletes.Add(i);
}
}
return deletes;
}
/// <summary>
/// Before <see cref="ReadFrom" /> is called the PersistentArrayHolder needs to setup
/// a temporary list to hold the objects.
/// </summary>
public override void BeginRead()
{
base.BeginRead();
tempList = new List<object>();
}
private void InitTransientState()
{
loadContexts = null;
nullAssociations = new HashedSet<AssociationKey>();
nonlazyCollections = new List<IPersistentCollection>(InitCollectionSize);
}
public override bool AfterInitialize(ICollectionPersister persister)
{
// NH Different behavior : NH-739
// would be nice to prevent this overhead but the operation is managed where the ICollectionPersister is not available
bool result;
if (persister.IsOneToMany && HasQueuedOperations)
{
int additionStartFrom = bag.Count;
IList additionQueue = new List<object>(additionStartFrom);
foreach (object o in QueuedAdditionIterator)
{
if (o != null)
{
for (int i = 0; i < bag.Count; i++)
{
// we are using ReferenceEquals to be sure that is exactly the same queued instance
if (ReferenceEquals(o, bag[i]))
{
additionQueue.Add(o);
break;
}
}
}
}
result = base.AfterInitialize(persister);
if(!result)
{
// removing duplicated additions
foreach (object o in additionQueue)
{
for (int i = additionStartFrom; i < bag.Count; i++)
{
if (ReferenceEquals(o, bag[i]))
{
bag.RemoveAt(i);
break;
}
}
}
}
}
else
{
result = base.AfterInitialize(persister);
}
return result;
}
/// <summary>
/// 1. Recreate the collection key -> collection map
/// 2. rebuild the collection entries
/// 3. call Interceptor.postFlush()
/// </summary>
protected virtual void PostFlush(ISessionImplementor session)
{
if (log.IsDebugEnabled)
{
log.Debug("post flush");
}
IPersistenceContext persistenceContext = session.PersistenceContext;
persistenceContext.CollectionsByKey.Clear();
persistenceContext.BatchFetchQueue.ClearSubselects();
//the database has changed now, so the subselect results need to be invalidated
// NH Different implementation: In NET an iterator is immutable;
// we need something to hold the persistent collection to remove, and it must be less intrusive as possible
IDictionary cEntries = persistenceContext.CollectionEntries;
List<IPersistentCollection> keysToRemove = new List<IPersistentCollection>(cEntries.Count);
foreach (DictionaryEntry me in cEntries)
{
CollectionEntry collectionEntry = (CollectionEntry) me.Value;
IPersistentCollection persistentCollection = (IPersistentCollection) me.Key;
collectionEntry.PostFlush(persistentCollection);
if (collectionEntry.LoadedPersister == null)
{
keysToRemove.Add(persistentCollection);
}
else
{
//otherwise recreate the mapping between the collection and its key
CollectionKey collectionKey =
new CollectionKey(collectionEntry.LoadedPersister, collectionEntry.LoadedKey, session.EntityMode);
persistenceContext.CollectionsByKey[collectionKey] = persistentCollection;
}
}
foreach (IPersistentCollection key in keysToRemove)
{
persistenceContext.CollectionEntries.Remove(key);
}
session.Interceptor.PostFlush((ICollection) persistenceContext.EntitiesByKey.Values);
}
public override IEnumerable GetDeletes(ICollectionPersister persister, bool indexIsFormula)
{
IList deletes = new List<object>();
IList sn = (IList) GetSnapshot();
int end;
if (sn.Count > list.Count)
{
for (int i = list.Count; i < sn.Count; i++)
{
deletes.Add(indexIsFormula ? sn[i] : i);
}
end = list.Count;
}
else
{
end = sn.Count;
}
for (int i = 0; i < end; i++)
{
if (list[i] == null && sn[i] != null)
{
deletes.Add(indexIsFormula ? sn[i] : i);
}
}
return deletes;
}
public override IEnumerable GetDeletes(ICollectionPersister persister, bool indexIsFormula)
{
IList deletes = new List<object>();
IDictionary sn = (IDictionary) GetSnapshot();
foreach (DictionaryEntry e in sn)
{
object key = e.Key;
if (!map.Contains(key))
{
deletes.Add(indexIsFormula ? e.Value : key);
}
}
return deletes;
}
/// <returns><see cref="IList" /> of <see cref="IType" /></returns>
protected SqlType[] GetParameterTypes(QueryParameters parameters, bool addLimit, bool addOffset)
{
List<IType> paramTypeList = new List<IType>();
int span = 0;
for (int index = 0; index < parameters.PositionalParameterTypes.Length; index++)
{
int location = parameters.PositionalParameterLocations[index];
location = parameters.FindAdjustedParameterLocation(location);
IType type = parameters.PositionalParameterTypes[index];
ArrayHelper.SafeSetValue(paramTypeList, location, type);
span += type.GetColumnSpan(Factory);
}
for (int index = 0; index < parameters.FilteredParameterTypes.Count; index++)
{
int location = parameters.FilteredParameterLocations[index];
IType type = parameters.FilteredParameterTypes[index];
ArrayHelper.SafeSetValue(paramTypeList, location, type);
span += type.GetColumnSpan(Factory);
}
if (parameters.NamedParameters != null && parameters.NamedParameters.Count > 0)
{
// convert the named parameters to an array of types
foreach (KeyValuePair<string, TypedValue> namedParameter in parameters.NamedParameters)
{
string name = namedParameter.Key;
TypedValue typedval = namedParameter.Value;
int[] locs = GetNamedParameterLocs(name);
span += typedval.Type.GetColumnSpan(Factory) * locs.Length;
for (int i = 0; i < locs.Length; i++)
{
int location = locs[i];
location = parameters.FindAdjustedParameterLocation(location);
// can still clash with positional parameters
// could consider throwing an exception to locate problem (NH-1098)
while ((location < paramTypeList.Count) && (paramTypeList[location] != null))
location++;
ArrayHelper.SafeSetValue(paramTypeList, location, typedval.Type);
}
}
}
if (addLimit && Factory.Dialect.SupportsVariableLimit)
{
if (Factory.Dialect.BindLimitParametersFirst)
{
paramTypeList.Insert(0, NHibernateUtil.Int32);
if (addOffset)
{
paramTypeList.Insert(0, NHibernateUtil.Int32);
}
}
else
{
paramTypeList.Add(NHibernateUtil.Int32);
if (addOffset)
{
paramTypeList.Add(NHibernateUtil.Int32);
}
}
span += addOffset ? 2 : 1;
}
return ConvertITypesToSqlTypes(paramTypeList, span);
}
protected SqlType[] ConvertITypesToSqlTypes(List<IType> nhTypes, int totalSpan)
{
SqlType[] result = new SqlType[totalSpan];
int index = 0;
foreach (IType type in nhTypes)
{
int span = type.SqlTypes(Factory).Length;
Array.Copy(type.SqlTypes(Factory), 0, result, index, span);
index += span;
}
return result;
}
protected internal virtual string RenderLoggableString(object value, ISessionFactoryImplementor factory)
{
IList list = new List<object>();
IType elemType = GetElementType(factory);
IEnumerable iter = GetElementsIterator(value);
foreach (object o in iter)
list.Add(elemType.ToLoggableString(o, factory));
return CollectionPrinter.ToString(list);
}
// For a one-to-many, a <bag> is not really a bag;
// it is *really* a set, since it can't contain the
// same element twice. It could be considered a bug
// in the mapping dtd that <bag> allows <one-to-many>.
// Anyway, here we implement <set> semantics for a
// <one-to-many> <bag>!
public override IEnumerable GetDeletes(ICollectionPersister persister, bool indexIsFormula)
{
IType elementType = persister.ElementType;
EntityMode entityMode = Session.EntityMode;
List<object> deletes = new List<object>();
IList sn = (IList) GetSnapshot();
int i = 0;
foreach (object old in sn)
{
bool found = false;
if (bag.Count > i && elementType.IsSame(old, bag[i++], entityMode))
{
//a shortcut if its location didn't change!
found = true;
}
else
{
foreach (object newObject in bag)
{
if (elementType.IsSame(old, newObject, entityMode))
{
found = true;
break;
}
}
}
if (!found)
{
deletes.Add(old);
}
}
return deletes;
}
void IDeserializationCallback.OnDeserialization(object sender)
{
log.Debug("Deserialization callback persistent-context");
// during deserialization, we need to reconnect all proxies and
// collections to this session, as well as the EntityEntry and
// CollectionEntry instances; these associations are transient
// because serialization is used for different things.
parentsByChild = IdentityMap.Instantiate(InitCollectionSize);
// OnDeserialization() must be called manually on all Dictionaries and Hashtables,
// otherwise they are still empty at this point (the .NET deserialization code calls
// OnDeserialization() on them AFTER it calls the current method).
entitiesByKey.OnDeserialization(sender);
entitiesByUniqueKey.OnDeserialization(sender);
((IDeserializationCallback)entityEntries).OnDeserialization(sender);
proxiesByKey.OnDeserialization(sender);
entitySnapshotsByKey.OnDeserialization(sender);
((IDeserializationCallback)arrayHolders).OnDeserialization(sender);
((IDeserializationCallback)collectionEntries).OnDeserialization(sender);
collectionsByKey.OnDeserialization(sender);
// If nullifiableEntityKeys is once used in the current method, HashedSets will need
// an OnDeserialization() method.
//nullifiableEntityKeys.OnDeserialization(sender);
if (unownedCollections != null)
{
unownedCollections.OnDeserialization(sender);
}
// TODO NH: "reconnect" EntityKey with session.factory and create a test for serialization of StatefulPersistenceContext
foreach (DictionaryEntry collectionEntry in collectionEntries)
{
try
{
((IPersistentCollection)collectionEntry.Key).SetCurrentSession(session);
CollectionEntry ce = (CollectionEntry)collectionEntry.Value;
if (ce.Role != null)
{
ce.AfterDeserialize(Session.Factory);
}
}
catch (HibernateException he)
{
throw new InvalidOperationException(he.Message);
}
}
List<EntityKey> keysToRemove = new List<EntityKey>();
foreach (KeyValuePair<EntityKey, INHibernateProxy> p in proxiesByKey)
{
if (p.Value != null)
{
(p.Value).HibernateLazyInitializer.Session = session;
}
else
{
// the proxy was pruned during the serialization process because the target had been instantiated.
keysToRemove.Add(p.Key);
}
}
for (int i = 0; i < keysToRemove.Count; i++)
proxiesByKey.Remove(keysToRemove[i]);
foreach (EntityEntry e in entityEntries.Values)
{
try
{
e.Persister = session.Factory.GetEntityPersister(e.EntityName);
}
catch (MappingException me)
{
throw new InvalidOperationException(me.Message);
}
}
}
void IDeserializationCallback.OnDeserialization(object sender)
{
log.Debug("Deserialization callback persistent-context");
// during deserialization, we need to reconnect all proxies and
// collections to this session, as well as the EntityEntry and
// CollectionEntry instances; these associations are transient
// because serialization is used for different things.
// TODO NH: "reconnect" EntityKey with session.factory and create a test for serialization of StatefulPersistenceContext
foreach (DictionaryEntry collectionEntry in collectionEntries)
{
try
{
((IPersistentCollection)collectionEntry.Key).SetCurrentSession(session);
CollectionEntry ce = (CollectionEntry)collectionEntry.Value;
if (ce.Role != null)
{
ce.AfterDeserialize(Session.Factory);
}
}
catch (HibernateException he)
{
throw new InvalidOperationException(he.Message);
}
}
List<EntityKey> keysToRemove = new List<EntityKey>();
foreach (KeyValuePair<EntityKey, INHibernateProxy> p in proxiesByKey)
{
if (p.Value != null)
{
(p.Value).HibernateLazyInitializer.Session = session;
}
else
{
// the proxy was pruned during the serialization process because the target had been instantiated.
keysToRemove.Add(p.Key);
}
}
for (int i = 0; i < keysToRemove.Count; i++)
proxiesByKey.Remove(keysToRemove[i]);
foreach (EntityEntry e in entityEntries.Values)
{
try
{
e.Persister = session.Factory.GetEntityPersister(e.EntityName);
}
catch (MappingException me)
{
throw new InvalidOperationException(me.Message);
}
}
}
/// <summary>
/// Queue an addition, delete etc. if the persistent collection supports it
/// </summary>
protected void QueueOperation(IDelayedOperation element)
{
if (operationQueue == null)
{
operationQueue = new List<IDelayedOperation>(10);
}
operationQueue.Add(element);
dirty = true; //needed so that we remove this collection from the second-level cache
}
/// <summary>
/// Remove an entity from the session cache, also clear
/// up other state associated with the entity, all except
/// for the <tt>EntityEntry</tt>
/// </summary>
public object RemoveEntity(EntityKey key)
{
object tempObject = entitiesByKey[key];
entitiesByKey.Remove(key);
object entity = tempObject;
List<EntityUniqueKey> toRemove = new List<EntityUniqueKey>();
foreach (KeyValuePair<EntityUniqueKey, object> pair in entitiesByUniqueKey)
{
if (pair.Value == entity) toRemove.Add(pair.Key);
}
foreach (EntityUniqueKey uniqueKey in toRemove)
{
entitiesByUniqueKey.Remove(uniqueKey);
}
entitySnapshotsByKey.Remove(key);
nullifiableEntityKeys.Remove(key);
BatchFetchQueue.RemoveBatchLoadableEntityKey(key);
BatchFetchQueue.RemoveSubselect(key);
return entity;
}
/// <summary>
/// Clears out any Queued operation.
/// </summary>
/// <remarks>
/// After flushing, clear any "queued" additions, since the
/// database state is now synchronized with the memory state.
/// </remarks>
public virtual void PostAction()
{
operationQueue = null;
cachedSize = -1;
ClearDirty();
}
/// <summary>
/// Takes the contents stored in the temporary list created during <see cref="BeginRead" />
/// that was populated during <see cref="ReadFrom" /> and write it to the underlying
/// array.
/// </summary>
public override bool EndRead(ICollectionPersister persister)
{
SetInitialized();
array = System.Array.CreateInstance(elementClass, tempList.Count);
for (int i = 0; i < tempList.Count; i++)
{
array.SetValue(tempList[i], i);
}
tempList = null;
return true;
}
public virtual bool AfterInitialize(ICollectionPersister persister)
{
SetInitialized();
//do this bit after setting initialized to true or it will recurse
if (operationQueue != null)
{
PerformQueuedOperations();
operationQueue = null;
cachedSize = -1;
return false;
}
else
{
return true;
}
}
public override ICollection GetOrphans(object snapshot, string entityName)
{
object[] sn = (object[]) snapshot;
object[] arr = (object[]) array;
List<object> result = new List<object>(sn);
for (int i = 0; i < sn.Length; i++)
{
IdentityRemove(result, arr[i], entityName, Session);
}
return result;
}
public ICollection GetQueuedOrphans(string entityName)
{
if (HasQueuedOperations)
{
List<object> additions = new List<object>(operationQueue.Count);
List<object> removals = new List<object>(operationQueue.Count);
for (int i = 0; i < operationQueue.Count; i++)
{
IDelayedOperation op = operationQueue[i];
if (op.AddedInstance != null)
{
additions.Add(op.AddedInstance);
}
if (op.Orphan != null)
{
removals.Add(op.Orphan);
}
}
return GetOrphans(removals, additions, entityName, session);
}
return CollectionHelper.EmptyCollection;
}
private static int[] GetTopologicalSortOrder(List<DependentAlias> fields)
{
TopologicalSorter g = new TopologicalSorter(fields.Count);
Dictionary<string, int> _indexes = new Dictionary<string, int>();
// add vertices
for (int i = 0; i < fields.Count; i++)
{
_indexes[fields[i].Alias.ToLower()] = g.AddVertex(i);
}
// add edges
for (int i = 0; i < fields.Count; i++)
{
if (fields[i].DependsOn != null)
{
for (int j = 0; j < fields[i].DependsOn.Length; j++)
{
var dependentField = fields[i].DependsOn[j].ToLower();
if (_indexes.ContainsKey(dependentField))
{
g.AddEdge(i, _indexes[dependentField]);
}
}
}
}
return g.Sort();
}
/// <summary>
/// Given a collection of entity instances that used to
/// belong to the collection, and a collection of instances
/// that currently belong, return a collection of orphans
/// </summary>
protected static ICollection GetOrphans(ICollection oldElements, ICollection currentElements, string entityName,
ISessionImplementor session)
{
// short-circuit(s)
if (currentElements.Count == 0)
{
// no new elements, the old list contains only Orphans
return oldElements;
}
if (oldElements.Count == 0)
{
// no old elements, so no Orphans neither
return oldElements;
}
IType idType = session.Factory.GetEntityPersister(entityName).IdentifierType;
// create the collection holding the orphans
List<object> res = new List<object>();
// collect EntityIdentifier(s) of the *current* elements - add them into a HashSet for fast access
HashedSet<TypedValue> currentIds = new HashedSet<TypedValue>();
foreach (object current in currentElements)
{
if (current != null && ForeignKeys.IsNotTransient(entityName, current, null, session))
{
object currentId = ForeignKeys.GetEntityIdentifierIfNotUnsaved(entityName, current, session);
currentIds.Add(new TypedValue(idType, currentId, session.EntityMode));
}
}
// iterate over the *old* list
foreach (object old in oldElements)
{
object oldId = ForeignKeys.GetEntityIdentifierIfNotUnsaved(entityName, old, session);
if (!currentIds.Contains(new TypedValue(idType, oldId, session.EntityMode)))
{
res.Add(old);
}
}
return res;
}
/// <summary>
/// Generate a sequence of <c>LEFT OUTER JOIN</c> clauses for the given associations.
/// </summary>
protected JoinFragment MergeOuterJoins(IList<OuterJoinableAssociation> associations)
{
IList<OuterJoinableAssociation> sortedAssociations = new List<OuterJoinableAssociation>();
var indices = GetTopologicalSortOrder(_dependentAliases);
for (int index = indices.Length - 1; index >= 0; index--)
{
sortedAssociations.Add(associations[indices[index]]);
}
JoinFragment outerjoin = Dialect.CreateOuterJoinFragment();
OuterJoinableAssociation last = null;
foreach (OuterJoinableAssociation oj in sortedAssociations)
{
if (last != null && last.IsManyToManyWith(oj))
{
oj.AddManyToManyJoin(outerjoin, (IQueryableCollection) last.Joinable);
}
else
{
oj.AddJoins(outerjoin);
// NH Different behavior : NH1179 and NH1293
// Apply filters in Many-To-One association
if (enabledFiltersForManyToOne.Count > 0)
{
string manyToOneFilterFragment = oj.Joinable.FilterFragment(oj.RHSAlias, enabledFiltersForManyToOne);
bool joinClauseDoesNotContainsFilterAlready =
outerjoin.ToFromFragmentString.IndexOfCaseInsensitive(manyToOneFilterFragment) == -1;
if (joinClauseDoesNotContainsFilterAlready)
{
outerjoin.AddCondition(manyToOneFilterFragment);
}
}
}
last = oj;
}
return outerjoin;
}
public static void IdentityRemove(IList list, object obj, string entityName, ISessionImplementor session)
{
if (obj != null && ForeignKeys.IsNotTransient(entityName, obj, null, session))
{
IType idType = session.Factory.GetEntityPersister(entityName).IdentifierType;
object idOfCurrent = ForeignKeys.GetEntityIdentifierIfNotUnsaved(entityName, obj, session);
List<object> toRemove = new List<object>(list.Count);
foreach (object current in list)
{
if (current == null)
{
continue;
}
object idOfOld = ForeignKeys.GetEntityIdentifierIfNotUnsaved(entityName, current, session);
if (idType.IsEqual(idOfCurrent, idOfOld, session.EntityMode, session.Factory))
{
toRemove.Add(current);
}
}
foreach (object ro in toRemove)
{
list.Remove(ro);
}
}
}
