///-------------------------------------------------------------------------------------------------
/// <summary>
/// Gets all.
/// </summary>
/// <param name="key">
/// The key.
/// </param>
/// <param name="skip">
/// The skip.
/// </param>
/// <returns>
/// An enumerator that allows foreach to be used to process all items in this collection.
/// </returns>
///-------------------------------------------------------------------------------------------------
public IEnumerable <Identity> GetAll(object key, int skip)
{
if (key == null)
{
return(null);
}
using (var session = EnsuresRunInSession())
{
HypergraphTransaction tx = null;
var graph = _graph.Target as HyperGraph;
if (graph != null)
{
tx = graph.CurrentTransaction;
}
_sync.EnterReadLock();
try
{
var cx = 0;
var result = new List <Identity>();
HashSet <Identity> list;
if (_index.TryGetValue(key, out list))
{
foreach (var id in list)
{
if (tx == null || tx.IsValidInTransaction(id))
{
if (cx++ >= skip)
{
result.Add(id);
}
}
}
}
if (tx != null && cx <= skip)
{
foreach (var id in tx.GetPendingIndexFor(Name, key))
{
if (cx++ >= skip)
{
result.Add(id);
}
}
}
return(result);
}
finally
{
_sync.ExitReadLock();
if (session != null)
{
session.AcceptChanges();
}
}
}
}
///-------------------------------------------------------------------------------------------------
/// <summary>
/// Gets the specified key.
/// </summary>
/// <param name="key">
/// The key.
/// </param>
/// <returns>
/// An Identity.
/// </returns>
///-------------------------------------------------------------------------------------------------
public Identity Get(object key)
{
if (key == null)
{
return(null);
}
using (var session = EnsuresRunInSession())
{
HypergraphTransaction tx = null;
var graph = _graph.Target as HyperGraph;
if (graph != null)
{
tx = graph.CurrentTransaction;
}
_sync.EnterReadLock();
try
{
HashSet <Identity> list;
if (_index.TryGetValue(key, out list))
{
foreach (var id in list)
{
if (tx == null || tx.IsValidInTransaction(id))
{
return(id);
}
}
}
// Il se peut que l'index ne soit pas encore mis à jour dans le contexte d'une transaction.
// On va voir si ce n'est pas le cas
if (tx != null)
{
return(tx.GetPendingIndexFor(Name, key)
.FirstOrDefault());
}
return(null);
}
finally
{
_sync.ExitReadLock();
if (session != null)
{
session.AcceptChanges();
}
}
}
}
protected ITransaction BeginTransaction()
{
DebugContract.Requires(Session.Current);
var tx = CurrentTransaction;
if (tx == null)
{
tx = new HypergraphTransaction(_indexManager);
CurrentTransaction = tx;
CurrentTransaction.UpdateProfiler(p => p.NumberOfTransactions.Incr());
}
else
{
// Nested
tx.PushNestedTransaction();
}
return(tx);
}
