public virtual Differences VisitQueryDifference(QueryDifference diff1, QueryDifference diff2){
Differences differences = new Differences(diff1, diff2);
if (diff1 == null || diff2 == null){
if (diff1 != diff2) differences.NumberOfDifferences++; else differences.NumberOfSimilarities++;
return differences;
}
QueryDifference changes = (QueryDifference)diff2.Clone();
QueryDifference deletions = (QueryDifference)diff2.Clone();
QueryDifference insertions = (QueryDifference)diff2.Clone();
// diff1.LeftSource;
// diff1.RightSource;
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 VisitQueryDifference(QueryDifference diff, QueryDifference changes, QueryDifference deletions, QueryDifference insertions){
this.UpdateSourceContext(diff, changes);
if (diff == null) return changes;
return diff;
}
public override Node VisitQueryDifference(QueryDifference qd) {
if (qd == null) return null;
qd.LeftSource = this.VisitExpression(qd.LeftSource);
qd.RightSource = this.VisitExpression(qd.RightSource);
if (qd.LeftSource == null || qd.LeftSource.Type == null ||
qd.RightSource == null || qd.RightSource.Type == null) return null;
Cardinality card = this.typeSystem.GetCardinality(qd.LeftSource, this.TypeViewer);
if (card != Cardinality.OneOrMore && card != Cardinality.ZeroOrMore) {
this.HandleError(qd.LeftSource, Error.QueryNotStream);
return null;
}
card = this.typeSystem.GetCardinality(qd.RightSource, this.TypeViewer);
if (card != Cardinality.OneOrMore && card != Cardinality.ZeroOrMore) {
this.HandleError(qd.RightSource, Error.QueryNotStream);
return null;
}
if (qd.LeftSource.Type.UniqueKey != qd.RightSource.Type.UniqueKey) {
this.HandleError(qd, Error.QueryBadDifferenceTypes, this.GetTypeName(qd.LeftSource.Type), this.GetTypeName(qd.RightSource.Type));
return null;
}
if (qd.Type == null) return null;
this.HandleError(qd, Error.QueryNotSupported);
return null;
}
public virtual Node VisitQueryDifference(QueryDifference diff){
if (diff == null) return null;
diff.LeftSource = this.VisitExpression(diff.LeftSource);
diff.RightSource = this.VisitExpression(diff.RightSource);
return diff;
}
public virtual void VisitQueryDifference(QueryDifference diff){
if (diff == null) return;
this.VisitExpression(diff.LeftSource);
this.VisitExpression(diff.RightSource);
}
public override Node VisitQueryDifference(QueryDifference diff){
if (diff == null) return null;
diff.LeftSource = this.VisitExpression(diff.LeftSource);
diff.RightSource = this.VisitExpression(diff.RightSource);
if (diff.LeftSource != null && diff.RightSource != null &&
diff.LeftSource.Type != null && diff.RightSource.Type != null ){
diff.Type = diff.LeftSource.Type; // hack for now
}
return diff;
}
public override Node VisitQueryDifference(QueryDifference diff){
if (diff == null) return null;
return base.VisitQueryDifference((QueryDifference)diff.Clone());
}
public virtual Node VisitQueryDifference(QueryDifference diff1, QueryDifference diff2){
if (diff1 == null) return null;
if (diff2 == null){
diff1.LeftSource = this.VisitExpression(diff1.LeftSource, null);
diff1.RightSource = this.VisitExpression(diff1.RightSource, null);
}else{
diff1.LeftSource = this.VisitExpression(diff1.LeftSource, diff2.LeftSource);
diff1.RightSource = this.VisitExpression(diff1.RightSource, diff2.RightSource);
}
return diff1;
}
public override Node VisitQueryDifference(QueryDifference diff) {
base.VisitQueryDifference(diff);
return this.Compose(diff, this.GetComposer(diff.LeftSource), this.GetComposer(diff.RightSource));
}
public override Node VisitQueryDifference(QueryDifference diff)
{
base.VisitQueryDifference(diff);
return(this.Compose(diff, this.GetComposer(diff.LeftSource), this.GetComposer(diff.RightSource)));
}
public EventingVisitor(Action<QueryDifference> visitQueryDifference) { VisitedQueryDifference += visitQueryDifference; } public event Action<QueryDifference> VisitedQueryDifference; public override Node VisitQueryDifference(QueryDifference diff) { if (VisitedQueryDifference != null) VisitedQueryDifference(diff); return base.VisitQueryDifference(diff); }
