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 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 UnmarshallingContext DescendMarshallingContext(Transaction trans, ObjectReference
@ref)
{
UnmarshallingContext context = new UnmarshallingContext(trans, @ref, Const4.AddToIdTree
, false);
context.ActivationDepth(ActivationDepthProvider().ActivationDepth(1, ActivationMode
.Activate));
return context;
}
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;
}
public virtual object InstantiateTransient(UnmarshallingContext context)
{
// overridden in YapClassPrimitive
// never called for primitive YapAny
var obj = InstantiateObject(context);
if (obj == null)
{
return null;
}
context.Container().Peeked(context.ObjectId(), obj);
if (context.ActivationDepth().RequiresActivation())
{
InstantiateFields(context);
}
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 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 object Get(Transaction trans, object onObject)
{
if (_containingClass == null)
{
return null;
}
ObjectContainerBase container = Container();
if (container == null)
{
return null;
}
lock (container.Lock())
{
// FIXME: The following is not really transactional.
// This will work OK for normal C/S and for
// single local mode but the transaction will
// be wrong for MTOC.
if (trans == null)
{
trans = container.Transaction;
}
container.CheckClosed();
ObjectReference @ref = trans.ReferenceForObject(onObject);
if (@ref == null)
{
return null;
}
int id = @ref.GetID();
if (id <= 0)
{
return null;
}
UnmarshallingContext context = new UnmarshallingContext(trans, @ref, Const4.AddToIdTree
, false);
context.ActivationDepth(new LegacyActivationDepth(1));
return context.ReadFieldValue(this);
}
}
