static bool SetAndLoadIfNull(System.Object container, FieldInfo info,
string path, ReloadAttribute.Package location)
{
if (IsNull(container, info))
{
info.SetValue(container, Load(path, info.FieldType, location));
return(true);
}
return(false);
}
static bool SetAndLoadIfNull(Array array, int index, string path, ReloadAttribute.Package location)
{
var element = array.GetValue(index);
if (IsNull(element))
{
array.SetValue(Load(path, array.GetType().GetElementType(), location), index);
return(true);
}
return(false);
}
static UnityEngine.Object Load(string path, Type type, ReloadAttribute.Package location)
{
// Check if asset exist.
// Direct loading can be prevented by AssetDatabase being reloading.
var guid = AssetDatabase.AssetPathToGUID(path);
if (location == ReloadAttribute.Package.Root && String.IsNullOrEmpty(guid))
{
throw new Exception($"Cannot load. Incorrect path: {path}");
}
// Else the path is good. Attempt loading resource if AssetDatabase available.
UnityEngine.Object result;
switch (location)
{
case ReloadAttribute.Package.Builtin:
if (type == typeof(Shader))
{
result = Shader.Find(path);
}
else
{
result = Resources.GetBuiltinResource(type, path); //handle wrong path error
}
break;
case ReloadAttribute.Package.BuiltinExtra:
if (type == typeof(Shader))
{
result = Shader.Find(path);
}
else
{
result = AssetDatabase.GetBuiltinExtraResource(type, path); //handle wrong path error
}
break;
case ReloadAttribute.Package.Root:
result = AssetDatabase.LoadAssetAtPath(path, type);
break;
default:
throw new NotImplementedException($"Unknown {location}");
}
if (IsNull(result))
{
var e = new Exception($"Cannot load. Path {path} is correct but AssetDatabase cannot load now.");
e.Data["InvalidImport"] = 1;
throw e;
}
return(result);
}