public static List <object> SelectFx <TSource>(this IEnumerable <TSource> source, string selectorExpression)
{
if (source == null)
{
throw new ArgumentNullException("source");
}
if (string.IsNullOrEmpty(selectorExpression))
{
throw new ArgumentException("Argument can't be null nor empty.", "selectorExpression");
}
selectorExpression = CodeUtils.PreprocessCode(selectorExpression);
Session session = RoslynUtils.CreateSession();
Exception exception;
Func <TSource, object> selector =
TryExecute <Func <TSource, object> >(selectorExpression, session, out exception);
if (selector != null)
{
return(source.Select(selector).ToList());
}
throw new ArgumentException(string.Format("Couldn't parse selector expression ('{0}') as Func<T, object>. TSource: '{1}'.", selectorExpression, typeof(TSource)), "selectorExpression", exception);
}
private static IEnumerable <TSource> DoOrderByFx <TSource>(IEnumerable <TSource> source, string keySelectorExpression, Type keyType)
{
if (source == null)
{
throw new ArgumentNullException("source");
}
if (string.IsNullOrEmpty(keySelectorExpression))
{
throw new ArgumentException("Argument can't be null nor empty.", "keySelectorExpression");
}
if (keyType == null)
{
throw new ArgumentNullException("keyType");
}
keySelectorExpression = CodeUtils.PreprocessCode(keySelectorExpression);
Session session = RoslynUtils.CreateSession();
Type keySelectorType = ReflectionUtils.CreateFuncType2(typeof(TSource), keyType);
Exception exception;
object keySelector =
TryExecute(keySelectorExpression, session, keySelectorType, out exception);
if (keySelector != null && keySelectorType.IsInstanceOfType(keySelector))
{
return(InvokeOrderBy(keyType, source, keySelector));
}
throw new ArgumentException(string.Format("Couldn't parse key selector expression ('{0}') as Func<TSource, TKey>. TSource: '{1}'. TKey: '{2}'.", keySelectorExpression, typeof(TSource), keyType), "keySelectorExpression");
}
public static object Run(string code)
{
if (code == null)
{
throw new ArgumentNullException("code");
}
code = CodeUtils.PreprocessCode(code);
Session session = RoslynUtils.CreateSession();
return(session.Execute(code));
}
public static List <TSource> WhereFx <TSource>(this IEnumerable <TSource> source, string predicateExpression)
{
if (source == null)
{
throw new ArgumentNullException("source");
}
if (string.IsNullOrEmpty(predicateExpression))
{
throw new ArgumentException("Argument can't be null nor empty.", "predicateExpression");
}
predicateExpression = CodeUtils.PreprocessCode(predicateExpression);
Session session = RoslynUtils.CreateSession();
Exception exception;
Func <TSource, bool> predicate =
TryExecute <Func <TSource, bool> >(predicateExpression, session, out exception);
if (predicate != null)
{
return(source.Where(predicate).ToList());
}
Func <TSource, int, bool> predicateWithIndex =
TryExecute <Func <TSource, int, bool> >(predicateExpression, session, out exception);
if (predicateWithIndex != null)
{
return(source.Where(predicateWithIndex).ToList());
}
throw new ArgumentException(string.Format("Couldn't parse predicate expression ('{0}') as neither Func<T, bool> nor Func<T, int, bool>. TSource: '{1}'.", predicateExpression, typeof(TSource)), "predicateExpression", exception);
}
