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();
}
public override void Activate(UnmarshallingContext context)
{
object obj = Read(context);
// Activation of members is necessary on purpose here.
// Classes like Hashtable need fully activated members
// to be able to calculate hashCode()
if (obj != null)
{
context.Container().Activate(context.Transaction(), obj, context.ActivationDepth(
));
}
SetOn(context.Transaction(), context.PersistentObject(), obj);
}
private object Activate(UnmarshallingContext context)
{
var obj = context.PersistentObject();
var objectReference = context.ObjectReference();
if (!ObjectCanActivate(context.Transaction(), obj))
{
objectReference.SetStateDeactivated();
return obj;
}
objectReference.SetStateClean();
if (context.ActivationDepth().RequiresActivation())
{
InstantiateFields(context);
}
ObjectOnActivate(context.Transaction(), objectReference);
return obj;
}
private object InstantiateObject(UnmarshallingContext context)
{
var obj = _constructor.Apply(context);
context.PersistentObject(obj);
return obj;
}
public virtual object Instantiate(UnmarshallingContext context)
{
// overridden in PrimitiveTypeMetadata
// never called for primitive YapAny
// FIXME: [TA] no longer necessary?
// context.adjustInstantiationDepth();
var obj = context.PersistentObject();
var instantiating = (obj == null);
if (instantiating)
{
obj = InstantiateObject(context);
if (obj == null)
{
return null;
}
ShareTransaction(obj, context.Transaction());
ShareObjectReference(obj, context.ObjectReference());
OnInstantiate(context, obj);
if (context.ActivationDepth().Mode().IsPrefetch())
{
context.ObjectReference().SetStateDeactivated();
return obj;
}
if (!context.ActivationDepth().RequiresActivation())
{
context.ObjectReference().SetStateDeactivated();
return obj;
}
return Activate(context);
}
if (ActivatingActiveObject(context.ActivationDepth().Mode(), context.ObjectReference
()))
{
var child = context.ActivationDepth().Descend(this);
if (child.RequiresActivation())
{
CascadeActivation(new ActivationContext4(context.Transaction(), obj, child));
}
return obj;
}
return Activate(context);
}
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);
}
}
public override void Activate(UnmarshallingContext context)
{
if (!CheckAlive(context))
{
return;
}
if (!ShouldStoreField())
{
IncrementOffset(context);
return;
}
object toSet = Read(context);
InformAboutTransaction(toSet, context.Transaction());
Set(context.PersistentObject(), toSet);
}
