public virtual Differences VisitQueryOrderItem(QueryOrderItem item1, QueryOrderItem item2){
Differences differences = new Differences(item1, item2);
if (item1 == null || item2 == null){
if (item1 != item2) differences.NumberOfDifferences++; else differences.NumberOfSimilarities++;
return differences;
}
QueryOrderItem changes = (QueryOrderItem)item2.Clone();
QueryOrderItem deletions = (QueryOrderItem)item2.Clone();
QueryOrderItem insertions = (QueryOrderItem)item2.Clone();
// item1.Expression;
// item1.OrderType;
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 virtual Node VisitQueryOrderItem(QueryOrderItem item, QueryOrderItem changes, QueryOrderItem deletions, QueryOrderItem insertions){
this.UpdateSourceContext(item, changes);
if (item == null) return changes;
if (changes != null){
if (deletions == null || insertions == null)
Debug.Assert(false);
else{
}
}else if (deletions != null)
return null;
return item;
}
public override Node VisitQueryOrderItem(QueryOrderItem qoi) {
// order items can only occur in the OrderBy.OrderList
if (qoi != null) this.HandleError(qoi, Error.QueryBadOrderItem);
return null;
}
public virtual Node VisitQueryOrderItem(QueryOrderItem item){
if (item == null) return null;
item.Expression = this.VisitExpression(item.Expression);
return item;
}
public virtual void VisitQueryOrderItem(QueryOrderItem item){
if (item == null) return;
this.VisitExpression(item.Expression);
}
public override Node VisitQueryOrderItem(QueryOrderItem item){
if (item == null) return null;
item.Expression = this.VisitExpression(item.Expression);
if (item.Expression != null && item.Expression.Type != null){
item.Type = item.Expression.Type;
}
return item;
}
public override Node VisitQueryOrderItem(QueryOrderItem item){
if (item == null) return null;
return base.VisitQueryOrderItem((QueryOrderItem)item.Clone());
}
public virtual Node VisitQueryOrderItem(QueryOrderItem item1, QueryOrderItem item2){
if (item1 == null) return null;
if (item2 == null)
item1.Expression = this.VisitExpression(item1.Expression, null);
else
item1.Expression = this.VisitExpression(item1.Expression, item2.Expression);
return item1;
}
public override Node VisitQueryOrderItem(QueryOrderItem item) {
base.VisitQueryOrderItem(item);
return this.Compose(item, this.GetComposer(item.Expression));
}
public override Node VisitQueryOrderItem(QueryOrderItem item)
{
base.VisitQueryOrderItem(item);
return(this.Compose(item, this.GetComposer(item.Expression)));
}
public EventingVisitor(Action<QueryOrderItem> visitQueryOrderItem) { VisitedQueryOrderItem += visitQueryOrderItem; } public event Action<QueryOrderItem> VisitedQueryOrderItem; public override Node VisitQueryOrderItem(QueryOrderItem item) { if (VisitedQueryOrderItem != null) VisitedQueryOrderItem(item); return base.VisitQueryOrderItem(item); }
