internal static DynamicUpdateMap Merge(DynamicUpdateMap first, DynamicUpdateMap second, MergeErrorContext errorContext)
{
if (first == null || second == null)
{
return(first ?? second);
}
if (first.IsNoChanges || second.IsNoChanges)
{
// DynamicUpdateMap.NoChanges has zero members, so we need to special-case it here.
return(first.IsNoChanges ? second : first);
}
ThrowIfMapsIncompatible(first, second, errorContext);
DynamicUpdateMap result = new DynamicUpdateMap
{
IsForImplementation = first.IsForImplementation,
NewDefinitionMemberCount = second.NewDefinitionMemberCount,
ArgumentsAreUnknown = first.ArgumentsAreUnknown && second.ArgumentsAreUnknown,
oldArguments = first.ArgumentsAreUnknown ? second.oldArguments : first.oldArguments,
newArguments = second.ArgumentsAreUnknown ? first.newArguments : second.newArguments
};
foreach (DynamicUpdateMapEntry firstEntry in first.Entries)
{
DynamicUpdateMapEntry parent = null;
if (firstEntry.Parent != null)
{
result.TryGetUpdateEntry(firstEntry.Parent.OldActivityId, out parent);
}
if (firstEntry.IsRemoval)
{
result.AddEntry(firstEntry.Clone(parent));
}
else
{
DynamicUpdateMapEntry secondEntry = second.entries[firstEntry.NewActivityId];
result.AddEntry(DynamicUpdateMapEntry.Merge(firstEntry, secondEntry, parent, errorContext));
}
}
return(result);
}
// rootIdSpace is optional. if it's null, result.NewActivity will be null
internal UpdatedActivity GetUpdatedActivity(QualifiedId oldQualifiedId, IdSpace rootIdSpace)
{
UpdatedActivity result = new UpdatedActivity();
int[] oldIdSegments = oldQualifiedId.AsIDArray();
int[] newIdSegments = null;
IdSpace currentIdSpace = rootIdSpace;
DynamicUpdateMap currentMap = this;
Fx.Assert(!this.IsForImplementation, "This method is never supposed to be called on an implementation map.");
for (int i = 0; i < oldIdSegments.Length; i++)
{
if (currentMap == null || currentMap.Entries.Count == 0)
{
break;
}
DynamicUpdateMapEntry entry;
if (!currentMap.TryGetUpdateEntry(oldIdSegments[i], out entry))
{
// UpdateMap should contain entries for all old activities in the IdSpace
int[] subIdSegments = new int[i + 1];
Array.Copy(oldIdSegments, subIdSegments, subIdSegments.Length);
throw FxTrace.Exception.AsError(new InstanceUpdateException(SR.InvalidUpdateMap(
SR.MapEntryNotFound(new QualifiedId(subIdSegments)))));
}
if (entry.IsIdChange)
{
if (newIdSegments == null)
{
newIdSegments = new int[oldIdSegments.Length];
Array.Copy(oldIdSegments, newIdSegments, oldIdSegments.Length);
}
newIdSegments[i] = entry.NewActivityId;
}
Activity currentActivity = null;
if (currentIdSpace != null && !entry.IsRemoval)
{
currentActivity = currentIdSpace[entry.NewActivityId];
if (currentActivity == null)
{
// New Activity pointed to by UpdateMap should exist
string activityId = currentIdSpace.Owner.Id + "." + entry.NewActivityId.ToString(CultureInfo.InvariantCulture);
throw FxTrace.Exception.AsError(new InstanceUpdateException(SR.InvalidUpdateMap(
SR.ActivityNotFound(activityId))));
}
currentIdSpace = currentActivity.ParentOf;
}
if (i == oldIdSegments.Length - 1)
{
result.Map = currentMap;
result.MapEntry = entry;
result.NewActivity = currentActivity;
}
else if (entry.IsRuntimeUpdateBlocked || entry.IsUpdateBlockedByUpdateAuthor)
{
currentMap = null;
}
else
{
currentMap = entry.ImplementationUpdateMap;
}
}
result.IdChanged = newIdSegments != null;
result.NewId = result.IdChanged ? new QualifiedId(newIdSegments) : oldQualifiedId;
return(result);
}