public static int SlotHandlerVersion(IExtObjectContainer objectContainer, object
obj)
{
int id = (int)objectContainer.GetID(obj);
IObjectInfo objectInfo = objectContainer.GetObjectInfo(obj);
ObjectContainerBase container = (ObjectContainerBase)objectContainer;
Transaction trans = container.Transaction;
ByteArrayBuffer buffer = container.ReadBufferById(trans, id);
UnmarshallingContext context = new UnmarshallingContext(trans, (ObjectReference)objectInfo
, Const4.Transient, false);
context.Buffer(buffer);
context.PersistentObject(obj);
context.ActivationDepth(new LegacyActivationDepth(0));
context.Read();
return context.HandlerVersion();
}
private object WriteAndRead(object obj)
{
var imaginativeID = 500;
var @ref = new ObjectReference(ClassMetadataForObject(obj), imaginativeID
);
@ref.SetObject(obj);
var marshallingContext = new MarshallingContext(Trans(), @ref, Container
().UpdateDepthProvider().ForDepth(int.MaxValue), true);
Handlers4.Write(@ref.ClassMetadata().TypeHandler(), marshallingContext, obj);
var pointer = marshallingContext.AllocateSlot();
var buffer = marshallingContext.ToWriteBuffer(pointer);
buffer.Seek(0);
// String str = new String(buffer._buffer);
// System.out.println(str);
var unmarshallingContext = new UnmarshallingContext(Trans(), @ref
, Const4.AddToIdTree, false);
unmarshallingContext.Buffer(buffer);
unmarshallingContext.ActivationDepth(new LegacyActivationDepth(5));
return unmarshallingContext.Read();
}
public virtual object ReadPrefetch(Db4objects.Db4o.Internal.Transaction trans, ByteArrayBuffer
buffer, int addToIDTree)
{
UnmarshallingContext context = new UnmarshallingContext(trans, buffer, this, addToIDTree
, false);
context.ActivationDepth(new FixedActivationDepth(1, ActivationMode.Prefetch));
return context.Read();
}
public object Read(Db4objects.Db4o.Internal.Transaction trans, ByteArrayBuffer buffer
, object obj, IActivationDepth instantiationDepth, int addToIDTree, bool checkIDTree
)
{
UnmarshallingContext context = new UnmarshallingContext(trans, buffer, this, addToIDTree
, checkIDTree);
context.PersistentObject(obj);
context.ActivationDepth(instantiationDepth);
return context.Read();
}
public override object Instantiate(UnmarshallingContext context)
{
var obj = context.PersistentObject();
if (obj == null)
{
obj = context.Read(TypeHandler());
context.SetObjectWeak(obj);
}
context.SetStateClean();
return obj;
}
public virtual void AttemptUpdate(UnmarshallingContext context)
{
if (!Updating())
{
IncrementOffset(context);
return;
}
int savedOffset = context.Offset();
try
{
object toSet = context.Read(GetHandler());
if (toSet != null)
{
Set(context.PersistentObject(), toSet);
}
}
catch (Exception)
{
// FIXME: COR-547 Diagnostics here please.
context.Buffer().Seek(savedOffset);
IncrementOffset(context);
}
}