Hey I have a simple class UiManager I wanna validate all variables so they should not be null

[SerializeField]    private    SceneLoaderManager.SceneName   gamePlaySceneName;
[SerializeField]    private    TextMeshProUGUI                coinCountUI;
[SerializeField]    private    TextMeshProUGUI                energyCountUI;

for now, I have only 3 variables but in the future, It can be more than 1000 I will probably validate them by checking for null but it's a lot of work to do

if (coinCountUi == null) Debug.Log ("you way forget to assign `CoinCountUi` "); 

How can I validate all variables at once and throw some kind of message to the user? I have an idea to do this but don't know how to execute it like [WarnOnNull] [SerializeField] private TextMeshProUGUI energyCountUI; please guide me how I can create Attribute like this which can validate those stuff

CodePudding user response：

How can I validate all variables at once when exactly? On compile time these are most probably always gonna be null.

You could of course go for reflection and use a certain attribute - or simply use the existing one SerializeField and only check those like e.g.

var type = GetType();
var serializedFields = type.GetFields(BindingFlags.Instance | BindingFlags.Public | BindingFlags.NonPublic | BindingFlags.FlattenHierarchy).Where(field => field.FieldType.IsValueType && (field.IsPublic || field.IsDefined(typeof(SerializeField)))).ToArray();

foreach (var field in serializedFields)
{
    var value = field.GetValue(this);
    if (value == null)
    {
        Debug.LogError($"{field.Name} is not referenced!");
    }
}