C# NeoDatis.GetPreviousClassOID方法代码示例

		public virtual void WriteClassInfoHeader(NeoDatis.Odb.Core.Layers.Layer2.Meta.ClassInfo
			 classInfo, long position, bool writeInTransaction)
		{
			NeoDatis.Odb.OID classId = classInfo.GetId();
			if (classId == null)
			{
				classId = idManager.GetNextClassId(position);
				classInfo.SetId(classId);
			}
			else
			{
				idManager.UpdateClassPositionForId(classId, position, true);
			}
			fsi.SetWritePosition(position, writeInTransaction);
			if (NeoDatis.Odb.OdbConfiguration.IsDebugEnabled(LogId))
			{
				NeoDatis.Tool.DLogger.Debug(DepthToSpaces() + "Writing new Class info header at "
					 + position + " : " + classInfo.ToString());
			}
			// Real value of block size is only known at the end of the writing
			fsi.WriteInt(0, writeInTransaction, "block size");
			fsi.WriteByte(NeoDatis.Odb.Impl.Core.Layers.Layer3.Block.BlockTypes.BlockTypeClassHeader
				, writeInTransaction, "class header block type");
			fsi.WriteByte(classInfo.GetClassCategory(), writeInTransaction, "Class info category"
				);
			fsi.WriteLong(classId.GetObjectId(), writeInTransaction, "class id", NeoDatis.Odb.Impl.Core.Transaction.DefaultWriteAction
				.DataWriteAction);
			WriteOid(classInfo.GetPreviousClassOID(), writeInTransaction, "prev class oid", NeoDatis.Odb.Impl.Core.Transaction.DefaultWriteAction
				.DataWriteAction);
			WriteOid(classInfo.GetNextClassOID(), writeInTransaction, "next class oid", NeoDatis.Odb.Impl.Core.Transaction.DefaultWriteAction
				.DataWriteAction);
			fsi.WriteLong(classInfo.GetCommitedZoneInfo().GetNbObjects(), writeInTransaction, 
				"class nb objects", NeoDatis.Odb.Impl.Core.Transaction.DefaultWriteAction.DataWriteAction
				);
			WriteOid(classInfo.GetCommitedZoneInfo().first, writeInTransaction, "class first obj pos"
				, NeoDatis.Odb.Impl.Core.Transaction.DefaultWriteAction.DataWriteAction);
			WriteOid(classInfo.GetCommitedZoneInfo().last, writeInTransaction, "class last obj pos"
				, NeoDatis.Odb.Impl.Core.Transaction.DefaultWriteAction.DataWriteAction);
			// FIXME : append extra info if not empty (.net compatibility)
			fsi.WriteString(classInfo.GetFullClassName(), false, writeInTransaction);
			fsi.WriteInt(classInfo.GetMaxAttributeId(), writeInTransaction, "Max attribute id"
				);
			if (classInfo.GetAttributesDefinitionPosition() != -1)
			{
				fsi.WriteLong(classInfo.GetAttributesDefinitionPosition(), writeInTransaction, "class att def pos"
					, NeoDatis.Odb.Impl.Core.Transaction.DefaultWriteAction.DataWriteAction);
			}
			else
			{
				// @todo check this
				fsi.WriteLong(-1, writeInTransaction, "class att def pos", NeoDatis.Odb.Impl.Core.Transaction.DefaultWriteAction
					.DataWriteAction);
			}
			int blockSize = (int)(fsi.GetPosition() - position);
			WriteBlockSizeAt(position, blockSize, writeInTransaction, classInfo);
		}

		/// <summary>Persist a single class info - This method is used by the XML Importer.</summary>
		/// <remarks>Persist a single class info - This method is used by the XML Importer.</remarks>
		public virtual NeoDatis.Odb.Core.Layers.Layer2.Meta.ClassInfo PersistClass(NeoDatis.Odb.Core.Layers.Layer2.Meta.ClassInfo
			 newClassInfo, int lastClassInfoIndex, bool addClass, bool addDependentClasses)
		{
			NeoDatis.Odb.Core.Layers.Layer2.Meta.MetaModel metaModel = GetSession().GetMetaModel
				();
			NeoDatis.Odb.OID classInfoId = newClassInfo.GetId();
			if (classInfoId == null)
			{
				classInfoId = GetIdManager().GetNextClassId(-1);
				newClassInfo.SetId(classInfoId);
			}
			long writePosition = fsi.GetAvailablePosition();
			newClassInfo.SetPosition(writePosition);
			GetIdManager().UpdateClassPositionForId(classInfoId, writePosition, true);
			if (NeoDatis.Odb.OdbConfiguration.IsDebugEnabled(LogId))
			{
				NeoDatis.Tool.DLogger.Debug("Persisting class into database : " + newClassInfo.GetFullClassName
					() + " with oid " + classInfoId + " at pos " + writePosition);
				NeoDatis.Tool.DLogger.Debug("class " + newClassInfo.GetFullClassName() + " has " 
					+ newClassInfo.GetNumberOfAttributes() + " attributes : " + newClassInfo.GetAttributes
					());
			}
			// The class info oid is created in ObjectWriter.writeClassInfoHeader
			if (metaModel.GetNumberOfClasses() > 0 && lastClassInfoIndex != -2)
			{
				NeoDatis.Odb.Core.Layers.Layer2.Meta.ClassInfo lastClassinfo = null;
				if (lastClassInfoIndex == -1)
				{
					lastClassinfo = metaModel.GetLastClassInfo();
				}
				else
				{
					lastClassinfo = metaModel.GetClassInfo(lastClassInfoIndex);
				}
				lastClassinfo.SetNextClassOID(newClassInfo.GetId());
				if (NeoDatis.Odb.OdbConfiguration.IsDebugEnabled(LogId))
				{
					NeoDatis.Tool.DLogger.Debug("changing next class oid. of class info " + lastClassinfo
						.GetFullClassName() + " @ " + lastClassinfo.GetPosition() + " + offset " + NeoDatis.Odb.Impl.Core.Layers.Layer3.Engine.StorageEngineConstant
						.ClassOffsetNextClassPosition + " to " + newClassInfo.GetId() + "(" + newClassInfo
						.GetFullClassName() + ")");
				}
				fsi.SetWritePosition(lastClassinfo.GetPosition() + NeoDatis.Odb.Impl.Core.Layers.Layer3.Engine.StorageEngineConstant
					.ClassOffsetNextClassPosition, true);
				fsi.WriteLong(newClassInfo.GetId().GetObjectId(), true, "next class oid", NeoDatis.Odb.Impl.Core.Transaction.DefaultWriteAction
					.PointerWriteAction);
				newClassInfo.SetPreviousClassOID(lastClassinfo.GetId());
			}
			if (addClass)
			{
				metaModel.AddClass(newClassInfo);
			}
			// updates number of classes
			WriteNumberOfClasses(metaModel.GetNumberOfClasses(), true);
			// If it is the first class , updates the first class OID
			if (newClassInfo.GetPreviousClassOID() == null)
			{
				WriteFirstClassInfoOID(newClassInfo.GetId(), true);
			}
			// Writes the header of the class - out of transaction (FIXME why out of
			// transaction)
			WriteClassInfoHeader(newClassInfo, writePosition, false);
			if (addDependentClasses)
			{
				NeoDatis.Tool.Wrappers.List.IOdbList<NeoDatis.Odb.Core.Layers.Layer2.Meta.ClassAttributeInfo
					> dependingAttributes = newClassInfo.GetAllNonNativeAttributes();
				NeoDatis.Odb.Core.Layers.Layer2.Meta.ClassAttributeInfo cai = null;
				for (int i = 0; i < dependingAttributes.Count; i++)
				{
					cai = dependingAttributes[i];
					try
					{
						NeoDatis.Odb.Core.Layers.Layer2.Meta.ClassInfo existingCI = metaModel.GetClassInfo
							(cai.GetFullClassname(), false);
						if (existingCI == null)
						{
							// TODO check if this getClassInfo is ok. Maybe, should
							// use
							// a buffered one
							AddClasses(classIntrospector.Introspect(cai.GetFullClassname(), true));
						}
						else
						{
							// Even,if it exist,take the one from metamodel
							cai.SetClassInfo(existingCI);
						}
					}
					catch (System.Exception e)
					{
						throw new NeoDatis.Odb.ODBRuntimeException(NeoDatis.Odb.Core.NeoDatisError.ClassIntrospectionError
							.AddParameter(cai.GetFullClassname()), e);
					}
				}
			}
			WriteClassInfoBody(newClassInfo, fsi.GetAvailablePosition(), true);
			return newClassInfo;
		}