Slickflow.Engine.Core.Pattern.NodeMediatorBackward.CreateBackwardActivityTaskTransitionInstance C# (CSharp) Method

        internal void CreateBackwardActivityTaskTransitionInstance(ProcessInstanceEntity processInstance,
            ActivityInstanceEntity fromActivityInstance,
            BackwardTypeEnum backwardType,
            int backMostPreviouslyActivityInstanceID,
            string transitionGUID,
            TransitionTypeEnum transitionType,
            TransitionFlyingTypeEnum flyingType,
            ActivityResource activityResource,
            IDbSession session)
        {
            //实例化Activity
            var toActivityInstance = base.CreateBackwardToActivityInstanceObject(processInstance,
                backwardType,
                backMostPreviouslyActivityInstanceID,
                activityResource.AppRunner);

            //进入准备运行状态
            toActivityInstance.ActivityState = (short)ActivityStateEnum.Ready;
            toActivityInstance.AssignedToUserIDs = base.GenerateActivityAssignedUserIDs(
                activityResource.NextActivityPerformers[base.BackwardContext.BackwardToTaskActivity.ActivityGUID]);
            toActivityInstance.AssignedToUserNames = base.GenerateActivityAssignedUserNames(
                activityResource.NextActivityPerformers[base.BackwardContext.BackwardToTaskActivity.ActivityGUID]);

            //插入活动实例数据
            base.ActivityInstanceManager.Insert(toActivityInstance,
                session);

            //插入任务数据
            base.CreateNewTask(toActivityInstance, activityResource, session);

            //插入转移数据
            base.InsertTransitionInstance(processInstance,
                transitionGUID,
                fromActivityInstance,
                toActivityInstance,
                transitionType,
                flyingType,
                activityResource.AppRunner,
                session);
        }

        internal override void ExecuteInstanceImp(IDbSession session)
        {
            //创建新任务节点
            var backMostPreviouslyActivityInstanceID = GetBackwardMostPreviouslyActivityInstanceID();
            var nodeMediatorBackward = new NodeMediatorBackward(base.BackwardContext, session);

            nodeMediatorBackward.CreateBackwardActivityTaskTransitionInstance(base.BackwardContext.ProcessInstance,
                base.BackwardContext.BackwardFromActivityInstance,
                BackwardTypeEnum.Withdrawed,
                backMostPreviouslyActivityInstanceID,
                base.BackwardContext.BackwardToTargetTransitionGUID,
                TransitionTypeEnum.Withdrawed,
                TransitionFlyingTypeEnum.NotFlying,
                base.ActivityResource,
                session);

            //更新撤销节点的状态（从准备状态更新为撤销状态）
            var aim = new ActivityInstanceManager();
            aim.Withdraw(base.BackwardContext.BackwardFromActivityInstance.ID,
                base.ActivityResource.AppRunner, session);

            //构造回调函数需要的数据
            WfExecutedResult result = base.WfExecutedResult;
            result.BackwardTaskReciever = base.BackwardContext.BackwardTaskReciever;
            result.Status = WfExecutedStatus.Success;
        }