private static bool CheckDictionaryAccessors(TypeModel model, Type pair, Type value)
{
return(pair.IsGenericType && pair.GetGenericTypeDefinition() == model.MapType(typeof(KeyValuePair <,>)) && pair.GetGenericArguments()[1] == value);
}
internal static Type GetListItemType(TypeModel model, Type listType)
{
if (listType == model.MapType(typeof(string)) || listType.IsArray || !model.MapType(typeof(IEnumerable)).IsAssignableFrom(listType))
{
return(null);
}
BasicList candidates = new BasicList();
MethodInfo[] methods = listType.GetMethods();
for (int i = 0; i < methods.Length; i++)
{
MethodInfo method = methods[i];
if (!method.IsStatic && !(method.Name != "Add"))
{
ParameterInfo[] parameters = method.GetParameters();
Type paramType;
if (parameters.Length == 1 && !candidates.Contains(paramType = parameters[0].ParameterType))
{
candidates.Add(paramType);
}
}
}
string name = listType.Name;
if (name == null || (name.IndexOf("Queue") < 0 && name.IndexOf("Stack") < 0))
{
TypeModel.TestEnumerableListPatterns(model, candidates, listType);
Type[] interfaces = listType.GetInterfaces();
for (int j = 0; j < interfaces.Length; j++)
{
Type iType = interfaces[j];
TypeModel.TestEnumerableListPatterns(model, candidates, iType);
}
}
PropertyInfo[] properties = listType.GetProperties(BindingFlags.Instance | BindingFlags.Public | BindingFlags.NonPublic);
for (int k = 0; k < properties.Length; k++)
{
PropertyInfo indexer = properties[k];
if (!(indexer.Name != "Item") && !candidates.Contains(indexer.PropertyType))
{
ParameterInfo[] args = indexer.GetIndexParameters();
if (args.Length == 1 && !(args[0].ParameterType != model.MapType(typeof(int))))
{
candidates.Add(indexer.PropertyType);
}
}
}
switch (candidates.Count)
{
case 0:
return(null);
case 1:
return((Type)candidates[0]);
case 2:
if (TypeModel.CheckDictionaryAccessors(model, (Type)candidates[0], (Type)candidates[1]))
{
return((Type)candidates[0]);
}
if (TypeModel.CheckDictionaryAccessors(model, (Type)candidates[1], (Type)candidates[0]))
{
return((Type)candidates[1]);
}
break;
}
return(null);
}