private static IPredicateVisitor CombinePredicateVisitors(IPredicateVisitor left, IPredicateVisitor right)
{
EqualPredicateVisitor equalLeft = left as EqualPredicateVisitor;
EqualPredicateVisitor equalRight = right as EqualPredicateVisitor;
Visitors.AccessorPredicateVisitor accessorLeft = equalLeft?.Left as Visitors.AccessorPredicateVisitor;
Visitors.AccessorPredicateVisitor accessorRight = equalRight?.Left as Visitors.AccessorPredicateVisitor;
IPredicateVisitor collection;
if (equalLeft?.Right is RangeCollectionPredicateVisitor rangeLeft &&
equalRight?.Right is RangeCollectionPredicateVisitor rangeRight)
{
List <RangePredicateVisitor> combinedRanges = new List <RangePredicateVisitor>();
combinedRanges.AddRange(rangeLeft.Ranges);
combinedRanges.AddRange(rangeRight.Ranges);
collection = new RangeCollectionPredicateVisitor(combinedRanges);
}
public IPredicateVisitor Convert(Expression expression, IPredicateVisitorFactory predicateVisitorFactory)
{
MethodCallExpression methodCallExpression = expression as MethodCallExpression;
if (methodCallExpression == null)
{
return(null);
}
IPredicateVisitor from = predicateVisitorFactory.Create(methodCallExpression.Arguments[1]);
IPredicateVisitor to = predicateVisitorFactory.Create(methodCallExpression.Arguments[2]);
RangePredicateVisitor range = new RangePredicateVisitor(from, to);
RangeCollectionPredicateVisitor ranges = new RangeCollectionPredicateVisitor(new List <RangePredicateVisitor>()
{
range
});
IPredicateVisitor parent = predicateVisitorFactory.Create(methodCallExpression.Arguments[0]);
return(new EqualPredicateVisitor(parent, ranges));
}
