private void Delete <T>(IEnumerable <T> dataset, bool suppressEventing, CascadeDeleteType cascadeDeleteType, bool referencesFromAllScopes, HashSet <DataSourceId> dataPendingDeletion)
where T : class, IData
{
Verify.ArgumentNotNull(dataset, nameof(dataset));
dataset = dataset.Evaluate();
foreach (var data in dataset)
{
var dataSourceId = data.DataSourceId;
if (!dataPendingDeletion.Contains(dataSourceId))
{
dataPendingDeletion.Add(dataSourceId);
}
}
if (cascadeDeleteType != CascadeDeleteType.Disable)
{
foreach (IData data in dataset)
{
Verify.ArgumentCondition(data != null, nameof(dataset), "dataset may not contain nulls");
Type interfaceType = data.DataSourceId.InterfaceType;
// Not deleting references if the data is versioned and not all of the
// versions of the element are to be deleted
if (data is IVersioned && interfaceType.GetKeyProperties().Count == 1)
{
var key = data.GetUniqueKey();
var versions = DataFacade.TryGetDataVersionsByUniqueKey(interfaceType, key).ToList();
if (versions.Count > 1 &&
(dataset.Count() < versions.Count ||
!versions.All(v => dataPendingDeletion.Contains(v.DataSourceId))))
{
continue;
}
}
using (new DataScope(data.DataSourceId.DataScopeIdentifier))
{
var allReferences = DataReferenceFacade.GetRefereesInt(data, referencesFromAllScopes, (a, b) => true);
if (allReferences.Count == 0)
{
continue;
}
Verify.IsTrue(cascadeDeleteType != CascadeDeleteType.Disallow, "One of the given datas is referenced by one or more datas");
var optionalReferences = allReferences.Where(kvp => kvp.Item2.IsOptionalReference);
var notOptionalReferences = allReferences.Where(kvp => !kvp.Item2.IsOptionalReference &&
!dataPendingDeletion.Contains(kvp.Item1.DataSourceId)).Evaluate();
foreach (var reference in optionalReferences)
{
var referee = reference.Item1;
reference.Item2.SourcePropertyInfo.SetValue(referee, null, null);
DataFacade.Update(referee, false, true, false);
}
foreach (var refereeInfo in notOptionalReferences)
{
if (!refereeInfo.Item2.AllowCascadeDeletes)
{
throw new InvalidOperationException("One of the given data items is referenced by one or more data items that do not allow cascade delete.");
}
}
var toDelete = notOptionalReferences.Select(_ => _.Item1);
Delete <IData>(toDelete, suppressEventing, cascadeDeleteType, referencesFromAllScopes);
}
}
}
Dictionary <string, Dictionary <Type, List <IData> > > sortedDatas = dataset.ToDataProviderAndInterfaceTypeSortedDictionary();
foreach (KeyValuePair <string, Dictionary <Type, List <IData> > > providerPair in sortedDatas)
{
foreach (KeyValuePair <Type, List <IData> > interfaceTypePair in providerPair.Value)
{
DataProviderPluginFacade.Delete(providerPair.Key, interfaceTypePair.Value.Select(d => d.DataSourceId));
if (DataCachingFacade.IsTypeCacheable(interfaceTypePair.Key))
{
DataCachingFacade.RemoveFromCache(interfaceTypePair.Value);
}
}
}
if (!suppressEventing)
{
foreach (IData element in dataset)
{
DataEventSystemFacade.FireDataDeletedEvent(element.DataSourceId.InterfaceType, element);
}
}
}
private void Delete <T>(IEnumerable <T> dataset, bool suppressEventing, CascadeDeleteType cascadeDeleteType, bool referencesFromAllScopes, HashSet <DataSourceId> dataPendingDeletion)
where T : class, IData
{
Verify.ArgumentNotNull(dataset, nameof(dataset));
dataset = dataset.Evaluate();
foreach (var data in dataset)
{
var dataSourceId = data.DataSourceId;
if (!dataPendingDeletion.Contains(dataSourceId))
{
dataPendingDeletion.Add(dataSourceId);
}
}
if (cascadeDeleteType != CascadeDeleteType.Disable)
{
foreach (IData element in dataset)
{
Verify.ArgumentCondition(element != null, nameof(dataset), "dataset may not contain nulls");
if (!element.IsDataReferred())
{
continue;
}
Type interfaceType = element.DataSourceId.InterfaceType;
// Not deleting references if the data is versioned and not all of the
// versions of the element are to be deleted
if (element is IVersioned)
{
var key = element.GetUniqueKey();
var versions = DataFacade.TryGetDataVersionsByUniqueKey(interfaceType, key).ToList();
if (versions.Count > 1 &&
(dataset.Count() < versions.Count ||
!versions.All(v => dataPendingDeletion.Contains(v.DataSourceId))))
{
continue;
}
}
Verify.IsTrue(cascadeDeleteType != CascadeDeleteType.Disallow, "One of the given datas is referenced by one or more datas");
element.RemoveOptionalReferences();
IEnumerable <IData> referees;
using (new DataScope(element.DataSourceId.DataScopeIdentifier))
{
// For some weird reason, this line does not work.... /MRJ
// IEnumerable<IData> referees = dataset.GetRefereesRecursively();
referees = element.GetReferees(referencesFromAllScopes)
.Where(reference => !dataPendingDeletion.Contains(reference.DataSourceId))
.Evaluate();
}
foreach (IData referee in referees)
{
if (!referee.CascadeDeleteAllowed(interfaceType))
{
throw new InvalidOperationException("One of the given datas is referenced by one or more datas that does not allow cascade delete");
}
}
Delete <IData>(referees, suppressEventing, cascadeDeleteType, referencesFromAllScopes);
}
}
Dictionary <string, Dictionary <Type, List <IData> > > sortedDatas = dataset.ToDataProviderAndInterfaceTypeSortedDictionary();
foreach (KeyValuePair <string, Dictionary <Type, List <IData> > > providerPair in sortedDatas)
{
foreach (KeyValuePair <Type, List <IData> > interfaceTypePair in providerPair.Value)
{
DataProviderPluginFacade.Delete(providerPair.Key, interfaceTypePair.Value.Select(d => d.DataSourceId));
if (DataCachingFacade.IsTypeCacheable(interfaceTypePair.Key))
{
DataCachingFacade.ClearCache(interfaceTypePair.Key, interfaceTypePair.Value.First().DataSourceId.DataScopeIdentifier);
}
}
}
if (!suppressEventing)
{
foreach (IData element in dataset)
{
DataEventSystemFacade.FireDataDeletedEvent(element.DataSourceId.InterfaceType, element);
}
}
}
