internal static Expression <Func <IEnumerable <T> > > Rewrite <T>(IndexQueryValues queryValues, Expression queryValuesExpression, Expression expression)
{
var enumerableRewriter = new IndexExpressionRewriter(queryValues, queryValuesExpression);
var body = enumerableRewriter.Visit(expression);
return(Expression.Lambda <Func <IEnumerable <T> > >(body, null));
}
internal IndexExpressionRewriter(IndexQueryValues index, Expression indexExpression)
{
_index = index ?? throw new ArgumentNullException(nameof(index));
_indexExpression = indexExpression ?? throw new ArgumentNullException(nameof(indexExpression));
_indexMethods = new Lazy <ILookup <string, MethodInfo> >(() =>
typeof(Index <>).MakeGenericType(index.ElementType).GetMethods(BindingFlags.Instance | BindingFlags.Public).ToLookup(m => m.Name));
}
internal static Func <IEnumerable <T> > Compile <T>(IndexQueryValues queryValues, Expression queryValuesExpression, Expression expression)
{
return(Rewrite <T>(queryValues, queryValuesExpression, expression).Compile());
}