public AttributeParser(AttributeConfiguration configuration, IParameterFormatter parameterFormatter, IValueConverter valueConverter, IHelpPresenter helpPresenter)
{
Configuration = configuration ?? throw new ArgumentNullException(nameof(configuration));
_attributeHandler = new AttributeHandler(configuration, parameterFormatter, (option, value) =>
{
var optionProperty = Configuration.GetOptionProperty(option);
return(valueConverter.ConvertFromString(option, optionProperty.PropertyInfo, AttributeHandler.GetValueType(optionProperty.Option, optionProperty.PropertyInfo.PropertyType), value));
},
(option) =>
{
return(Configuration.GetOptionProperty(option).PropertyInfo.PropertyType);
});
_helpPresenter = helpPresenter ?? throw new ArgumentNullException(nameof(helpPresenter));
}
public void SetValue(object?value)
{
if (AttributeHandler.IsCollectionAttribute(Option))
{
if (value == null)
{
throw new InvalidOperationException($"The target value for the property \"{ParameterInfo.Name}\" on \"{MethodName}\" is null, but it is marked as a collection.");
}
//TODO: Create element of the correct type.
if (Value == null)
{
var constructor = ParameterInfo.ParameterType.GetConstructors().FirstOrDefault((x) => x.IsPublic && x.GetParameters().Length == 0);
if (constructor != null)
{
Value = constructor.Invoke(new object[0]);
}
else
{
Value = Activator.CreateInstance(typeof(List <>).MakeGenericType(AttributeHandler.GetValueType(Option, ParameterInfo.ParameterType)));
}
}
var list = (IList)Value;
list.Clear();
foreach (var element in (IList)value)
{
list.Add(element);
}
}
else
{
Value = value;
}
}