private void FindStartingTask(ref List <SetupComponentInfo> .Enumerator componentEnumerator, ref List <TaskInfo> .Enumerator taskEnumerator, ref bool nextTaskNonFatal, InstallationModes installationMode, InstallationCircumstances installationCircumstance)
{
bool flag = false;
if (this.ImplementsResume && this.isResuming && installationMode != InstallationModes.BuildToBuildUpgrade)
{
ConfigurationStatus configurationStatus = new ConfigurationStatus(this.taskNoun, this.InstallationMode);
RolesUtility.GetConfiguringStatus(ref configurationStatus);
base.WriteVerbose(Strings.LookingForTask(configurationStatus.Action.ToString(), configurationStatus.Watermark));
while (!flag && componentEnumerator.MoveNext())
{
taskEnumerator = componentEnumerator.Current.Tasks.GetEnumerator();
while (!flag && taskEnumerator.MoveNext())
{
if (taskEnumerator.Current.GetID() == configurationStatus.Watermark)
{
flag = true;
if (this.InstallationMode == InstallationModes.Uninstall && configurationStatus.Action == InstallationModes.Install)
{
nextTaskNonFatal = true;
}
}
else if (!string.IsNullOrEmpty(taskEnumerator.Current.GetTask(installationMode, installationCircumstance)))
{
this.completedSteps += taskEnumerator.Current.GetWeight(installationMode);
}
}
}
if (!flag)
{
base.WriteVerbose(Strings.CouldNotFindTask);
this.completedSteps = 0;
}
}
if (!flag)
{
componentEnumerator = this.ComponentInfoList.GetEnumerator();
while (componentEnumerator.MoveNext())
{
SetupComponentInfo setupComponentInfo = componentEnumerator.Current;
taskEnumerator = setupComponentInfo.Tasks.GetEnumerator();
if (taskEnumerator.MoveNext())
{
flag = true;
break;
}
base.WriteVerbose(Strings.ComponentEmpty(componentEnumerator.Current.Name));
}
if (!flag)
{
throw new EmptyTaskListException();
}
}
}
protected override void InternalValidate()
{
TaskLogger.LogEnter();
this.CheckInstallationMode();
ConfigurationStatus configurationStatus = new ConfigurationStatus(this.taskNoun);
RolesUtility.GetConfiguringStatus(ref configurationStatus);
if (this.ImplementsResume && configurationStatus.Action != InstallationModes.Unknown && configurationStatus.Watermark != null)
{
this.isResuming = true;
if (configurationStatus.Action != this.InstallationMode && (configurationStatus.Action != InstallationModes.Install || this.InstallationMode != InstallationModes.Uninstall))
{
base.WriteError(new IllegalResumptionException(configurationStatus.Action.ToString(), this.InstallationMode.ToString()), ErrorCategory.InvalidOperation, null);
}
}
base.InternalValidate();
TaskLogger.LogExit();
}