protected override IQueryable <TSourceData> DefaultFilter(IQueryable <TSourceData> source, IEnumerable <TVal> key)
{
var anyNulls = key.Any(c => c == null);
var expr = ReflectionCache.CallContainsMethod(key.ToArray(), _sourceExpression);
if (anyNulls)
{
var nullcmp = LambdaHelpers.ConstantBinaryLambdaExpression(ExpressionType.Equal, _sourceExpression, null);
expr = LambdaHelpers.BinaryLambdaExpression(ExpressionType.Or, expr, nullcmp);
}
return(ReflectionCache.CallWhere(source, expr));
}
