private int CopyDependentSlot(IDefragmentContext context, int sourceId) { try { ByteArrayBuffer sourceBuffer = context.SourceBufferById(sourceId); Slot targetPayloadSlot = context.AllocateTargetSlot(sourceBuffer.Length()); int targetId = context.Services().TargetNewId(); context.Services().MapIDs(sourceId, targetId, false); context.Services().Mapping().MapId(targetId, targetPayloadSlot); DefragmentContextImpl payloadContext = new DefragmentContextImpl(sourceBuffer, (DefragmentContextImpl )context); int clazzId = payloadContext.CopyIDReturnOriginalID(); ITypeHandler4 payloadHandler = payloadContext.TypeHandlerForId(clazzId); ITypeHandler4 versionedPayloadHandler = HandlerRegistry.CorrectHandlerVersion(payloadContext , payloadHandler); versionedPayloadHandler.Defragment(payloadContext); payloadContext.WriteToTarget(targetPayloadSlot.Address()); return targetId; } catch (IOException ioexc) { throw new Db4oIOException(ioexc); } }