/// <summary>
/// Sets the value of the property, or if it has a NamedCollectionOption, adds it to the collection of the property value.
/// </summary>
/// <param name="instance"></param>
/// <param name="value"></param>
public void SetValue(object instance, object?value)
{
if (AttributeHandler.IsCollectionAttribute(Option))
{
if (value == null)
{
throw new InvalidOperationException($"The target value for the property \"{PropertyInfo.Name}\" on \"{PropertyInfo.DeclaringType}\" is null, but it is marked as a collection.");
}
var propertyValue = PropertyInfo.GetValue(instance) ?? throw new InvalidOperationException($"The property \"{PropertyInfo.Name}\" on \"{PropertyInfo.DeclaringType}\" must return an instance.");
//TODO: use ICollection for this case, instead of IList.
//that way we don't demand both IList and ICollection<>
var list = (IList)propertyValue;
list.Clear();
foreach (var element in (IList)value)
{
list.Add(element);
}
}
else
{
PropertyInfo.SetValue(instance, value);
}
}
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;
}
}