/// <summary>
/// 流程返签，先检查约束条件，然后调用wfruntimeinstance执行
/// </summary>
/// <param name="appName"></param>
/// <param name="appInstanceID"></param>
/// <param name="processGUID"></param>
/// <param name="userID"></param>
/// <param name="userName"></param>
/// <returns></returns>
public WfRuntimeManager GetRuntimeInstanceReverse(string appName,
int appInstanceID,
Guid processGUID,
int userID,
string userName)
{
var pim = new ProcessInstanceManager();
var processInstance = pim.GetCompletedProcess(appName, appInstanceID, processGUID);
if (processInstance == null)
{
throw new WfRuntimeException(string.Format("当前应用:{0}，实例ID：{0}, 没有办结的流程实例，无法让流程重新运行！",
appName, appInstanceID));
}
var processModel = new ProcessModel(processGUID);
var endTransitionInstance = (new TransitionInstanceManager()).GetEndTransition(appName, appInstanceID, processGUID);
var lastTaskActivity = processModel.GetActivity(endTransitionInstance.FromActivityGUID);
var lastTaskActivityInstace = (new ActivityInstanceManager()).GetById(endTransitionInstance.FromActivityInstanceGUID);
var lastToEndTransition = processModel.GetForwardTransition(lastTaskActivity.ActivityGUID);
if (!lastTaskActivityInstace.EndedByUserID.HasValue)
{
throw new WfRuntimeException("流程最后一步的办理人员为空，不正常的流程数据，无法使结束的流程回退！");
}
var endActivity = processModel.GetActivity(endTransitionInstance.ToActivityGUID);
var endActivityInstance = (new ActivityInstanceManager()).GetById(endTransitionInstance.ToActivityInstanceGUID);
this.AppRunner.NextActivityPerformers = ActivityResource.CreateNextActivityPerformers(endTransitionInstance.FromActivityGUID,
lastTaskActivityInstace.EndedByUserID.Value,
lastTaskActivityInstace.EndedByUserName);
this.ActivityResource = new ActivityResource(userID, userName, this.AppRunner.NextActivityPerformers);
this.AppRunner.AppName = appName;
this.AppRunner.AppInstanceID = appInstanceID;
this.AppRunner.ProcessGUID = processGUID;
this.AppRunner.UserID = userID;
this.AppRunner.UserName = userName;
this.BackwardContext.ProcessInstance = processInstance;
this.BackwardContext.BackwardToTaskActivity = lastTaskActivity;
this.BackwardContext.BackwardToTaskActivityInstance = lastTaskActivityInstace;
this.BackwardContext.BackwardToTargetTransition = lastToEndTransition;
this.BackwardContext.FromActivity = endActivity;
this.BackwardContext.FromActivityInstance = endActivityInstance;
return(this);
}