/// <summary>
/// Permet de retourner la liste des methodes d'evaluation disponibles dans les types fournis.
/// </summary>
/// <param name="types"></param>
/// <returns></returns>
private IEnumerable <(Type, ExposeClassAttribute, ExposeMethodAttribute, MethodInfo)> GetActions_Impl(BindingFlags bindings, params Type[] types)
{
var _result = new List <(Type, ExposeClassAttribute, ExposeMethodAttribute, MethodInfo)>();
var _types = new ExposedTypes()
.GetTypes()
.Where(c => types.Contains(c.Key))
.ToList();
foreach (var u in _types)
{
var type = u.Key;
foreach (ExposeClassAttribute attribute in u.Value)
{
if (attribute.Context == Context)
{
var items = MethodDiscovery.GetMethods(type, bindings, returnType, methodSign);
foreach (var method in items)
{
var attribute2 = method.GetCustomAttribute <ExposeMethodAttribute>();
if (attribute2 != null && (string.IsNullOrEmpty(Context) || attribute2.Context == Context))
{
_result.Add((u.Key, attribute, attribute2, method));
}
}
}
}
}
return(_result);
}
/// <summary>
/// Permet de retourner la liste des methodes d'evaluation disponibles dans les types fournis.
/// </summary>
/// <param name="types"></param>
/// <returns></returns>
private IEnumerable <BusinessAction <T> > GetActions_Impl <T>(BindingFlags bindings, params Type[] types)
{
var _result = new List <BusinessAction <T> >();
var _types = new ExposedTypes()
.GetTypes()
.Where(c => types.Contains(c.Key))
.ToList();
foreach (var u in _types)
{
var type = u.Key;
foreach (ExposeClassAttribute attribute in u.Value)
{
string name = attribute.Name ?? type.Name;
var items = MethodDiscovery.GetMethods(type, bindings, returnType, methodSign);
foreach (var method in items)
{
RegisterMethodAttribute attribute2 = TypeDescriptor.GetAttributes(method).OfType <RegisterMethodAttribute>().FirstOrDefault();
if (attribute2 != null && (string.IsNullOrEmpty(Context) || attribute2.Context == Context))
{
_result.Add(new BusinessAction <T>
{
Name = $"{name}.{attribute2.DisplayName}",
Method = method,
Type = type,
RuleName = attribute2.DisplayName,
Origin = $"Assembly {type.AssemblyQualifiedName}",
Context = attribute2.Context,
});
}
}
}
}
return(_result);
}
/// <summary>
/// Smarts convert help to create expression with many consideration on source type and target type.
/// if no converter found yo can create one in custom class decorated '[Bb.ComponentModel.Attributes.ExposeClass(Context = ConstantsCore.Cast)]'
/// </summary>
/// <param name="self">The self.</param>
/// <param name="targetType">Type of the target.</param>
/// <returns></returns>
/// <exception cref="System.InvalidCastException">no adapted method cast found for {argument.Type.Name} -> {targetType.Name}</exception>
public static Expression SmartConvert(this Expression self, Type targetType)
{
var bindings = BindingFlags.Static | BindingFlags.Public;
var argument = self;
if (argument is ConstantExpression c)
{
argument = Expression.Constant(Convert.ChangeType(c.Value, targetType));
}
else
{
var types = new List <Type>()
{
argument.Type
};
MethodInfo convertMethod = null;
if (targetType.IsAssignableFrom(self.Type))
{
argument = Expression.Convert(self, targetType);
}
else
{
if (convertMethod == null) // try to get implicit or explicit opérator
{
convertMethod = MethodDiscovery.GetMethods(argument.Type, bindings, targetType, types).FirstOrDefault();
}
if (convertMethod == null) // try in convert static methods
{
convertMethod = MethodDiscovery.GetMethods(typeof(Convert), bindings, targetType, types).FirstOrDefault();
}
if (convertMethod == null) // try in custom class
{
var _types = TypeDiscovery.Instance.GetTypesWithAttributes <ExposeClassAttribute>(typeof(object), (attr) => attr.Context == ConstantsCore.Cast).ToList();
foreach (var item in _types)
{
if ((convertMethod = MethodDiscovery.GetMethods(item, bindings, targetType, types).FirstOrDefault()) != null)
{
break;
}
}
}
if (convertMethod != null)
{
argument = Expression.Call(convertMethod, argument);
}
else
{
if (System.Diagnostics.Debugger.IsAttached)
{
System.Diagnostics.Debugger.Break();
}
throw new InvalidCastException($"no adapted method cast found for {argument.Type.Name} -> {targetType.Name}. Please considere use a static class tagged [ExposeClass(Context =Constants.Cast)] with a specialized method to convert.");
}
}
}
return(argument);
}
