public virtual Differences VisitQueryUpdate(QueryUpdate update1, QueryUpdate update2){
Differences differences = new Differences(update1, update2);
if (update1 == null || update2 == null){
if (update1 != update2) differences.NumberOfDifferences++; else differences.NumberOfSimilarities++;
return differences;
}
QueryUpdate changes = (QueryUpdate)update2.Clone();
QueryUpdate deletions = (QueryUpdate)update2.Clone();
QueryUpdate insertions = (QueryUpdate)update2.Clone();
// update1.Context;
// update1.Source;
// update1.UpdateList;
if (differences.NumberOfDifferences == 0){
differences.Changes = null;
differences.Deletions = null;
differences.Insertions = null;
}else{
differences.Changes = changes;
differences.Deletions = deletions;
differences.Insertions = insertions;
}
return differences;
}
public override Node VisitQueryUpdate(QueryUpdate update){
if (update == null) return null;
return base.VisitQueryUpdate((QueryUpdate)update.Clone());
}
