// query nodes
public virtual Differences VisitQueryAggregate(QueryAggregate qa1, QueryAggregate qa2){
Differences differences = new Differences(qa1, qa2);
if (qa1 == null || qa2 == null){
if (qa1 != qa2) differences.NumberOfDifferences++; else differences.NumberOfSimilarities++;
return differences;
}
QueryAggregate changes = (QueryAggregate)qa2.Clone();
QueryAggregate deletions = (QueryAggregate)qa2.Clone();
QueryAggregate insertions = (QueryAggregate)qa2.Clone();
Differences diff = this.VisitTypeNode(qa1.AggregateType, qa2.AggregateType);
if (diff == null){Debug.Assert(false); return differences;}
changes.AggregateType = diff.Changes as TypeNode;
deletions.AggregateType = diff.Deletions as TypeNode;
insertions.AggregateType = diff.Insertions as TypeNode;
//Debug.Assert(diff.Changes == changes.AggregateType && diff.Deletions == deletions.AggregateType && diff.Insertions == insertions.AggregateType);
differences.NumberOfDifferences += diff.NumberOfDifferences;
differences.NumberOfSimilarities += diff.NumberOfSimilarities;
diff = this.VisitExpression(qa1.Expression, qa2.Expression);
if (diff == null){Debug.Assert(false); return differences;}
changes.Expression = diff.Changes as Expression;
deletions.Expression = diff.Deletions as Expression;
insertions.Expression = diff.Insertions as Expression;
Debug.Assert(diff.Changes == changes.Expression && diff.Deletions == deletions.Expression && diff.Insertions == insertions.Expression);
differences.NumberOfDifferences += diff.NumberOfDifferences;
differences.NumberOfSimilarities += diff.NumberOfSimilarities;
diff = this.VisitQueryGroupBy(qa1.Group, qa2.Group);
if (diff == null){Debug.Assert(false); return differences;}
changes.Group = diff.Changes as QueryGroupBy;
deletions.Group = diff.Deletions as QueryGroupBy;
insertions.Group = diff.Insertions as QueryGroupBy;
Debug.Assert(diff.Changes == changes.Group && diff.Deletions == deletions.Group && diff.Insertions == insertions.Group);
differences.NumberOfDifferences += diff.NumberOfDifferences;
differences.NumberOfSimilarities += diff.NumberOfSimilarities;
diff = this.VisitIdentifier(qa1.Name, qa2.Name);
if (diff == null){Debug.Assert(false); return differences;}
changes.Name = diff.Changes as Identifier;
deletions.Name = diff.Deletions as Identifier;
insertions.Name = diff.Insertions as Identifier;
Debug.Assert(diff.Changes == changes.Name && diff.Deletions == deletions.Name && diff.Insertions == insertions.Name);
differences.NumberOfDifferences += diff.NumberOfDifferences;
differences.NumberOfSimilarities += diff.NumberOfSimilarities;
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;
}
// query nodes
public override Node VisitQueryAggregate(QueryAggregate qa){
if (qa == null) return null;
return base.VisitQueryAggregate((QueryAggregate)qa.Clone());
}