protected virtual bool ObjectCanUpdate(Db4objects.Db4o.Internal.Transaction transaction
, object obj)
{
ObjectContainerBase container = transaction.Container();
return(container.Callbacks().ObjectCanUpdate(transaction, this) && _class.DispatchEvent
(transaction, obj, EventDispatchers.CanUpdate));
}
private void ObjectOnNew(Db4objects.Db4o.Internal.Transaction transaction, object
obj)
{
ObjectContainerBase container = transaction.Container();
container.Callbacks().ObjectOnNew(transaction, this);
_class.DispatchEvent(transaction, obj, EventDispatchers.New);
}
/// <exception cref="Db4objects.Db4o.Ext.Db4oIOException"></exception>
public virtual bool Close()
{
lock (Lock())
{
if (IsClosed())
{
return(false);
}
if (!_server.IsClosed())
{
if (!_server.ConfigImpl.IsReadOnly())
{
Commit();
}
}
_server.Callbacks().CloseOnStarted(this);
_server.CloseTransaction(_transaction, false, false);
_closed = true;
return(true);
}
}
public virtual void WriteUpdate(Db4objects.Db4o.Internal.Transaction transaction,
IUpdateDepth updatedepth)
{
ContinueSet(transaction, updatedepth);
// make sure, a concurrent new, possibly triggered by objectOnNew
// is written to the file
// preventing recursive
if (!BeginProcessing())
{
return;
}
object obj = GetObject();
if (!ObjectCanUpdate(transaction, obj) || !IsActive() || obj == null || !ClassMetadata
().IsModified(obj))
{
EndProcessing();
return;
}
MarshallingContext context = new MarshallingContext(transaction, this, updatedepth
, false);
if (context.UpdateDepth().Negative())
{
EndProcessing();
return;
}
ObjectContainerBase container = transaction.Container();
LogEvent(container, "update", Const4.State);
SetStateClean();
context.PurgeFieldIndexEntriesOnUpdate(transaction, container._handlers.ArrayType
(obj));
Handlers4.Write(_class.TypeHandler(), context, obj);
if (context.UpdateDepth().CanSkip(this))
{
EndProcessing();
return;
}
Pointer4 pointer = context.AllocateSlot();
ByteArrayBuffer buffer = context.ToWriteBuffer(pointer);
container.WriteUpdate(transaction, pointer, _class, container._handlers.ArrayType
(obj), buffer);
if (IsActive())
{
SetStateClean();
}
EndProcessing();
container.Callbacks().ObjectOnUpdate(transaction, this);
ClassMetadata().DispatchEvent(transaction, obj, EventDispatchers.Update);
}
