protected static object GetDataContextActivities(Activity compiledRoot, bool forImplementation)
{
var vistor = new CompiledDataContextActivityVistor();
vistor.Visit(compiledRoot, forImplementation);
var cache = new CompiledDataContextActivitiesCache(vistor.DataContextActivities);
return(cache);
}
private static ActivityInstance GetDataContextInstance(CompiledDataContextActivitiesCache dataContextActivities, ActivityContext activityContext, Activity compiledRoot)
{
ActivityInstance dataContextInstance = null;
var currentInstance = activityContext.CurrentInstance;
while (currentInstance != null)
{
if (dataContextActivities.Contains(currentInstance.Activity))
{
dataContextInstance = currentInstance;
break;
}
//
// Make sure we don't walk out of our IdSpace
if (currentInstance.Activity == compiledRoot)
{
break;
}
//
// For SecondaryRoot scenarios the ActivityInstance tree may not
// contain any of the data context activity instances because
// the instance tree does not have to match the activity definition tree.
// In this case just use the root instance.
if (currentInstance.Parent == null)
{
dataContextInstance = currentInstance;
}
currentInstance = currentInstance.Parent;
}
if (dataContextInstance == null)
{
throw FxTrace.Exception.AsError(new InvalidOperationException(SR.CompiledExpressionsNoCompiledRoot(activityContext.Activity.Id)));
}
return(dataContextInstance);
}
