/// <summary>
/// Returns the ValidationModelField associated with object. If a non-null view model object is passed
/// across then it is always used, otherwise the <see cref="ViewModelObject"/> value is used.
/// </summary>
/// <param name="viewModelObject"></param>
/// <returns></returns>
public ValidationModelField GetField(ViewModelObject viewModelObject)
{
ValidationModelField result;
var obj = viewModelObject ?? SingleInstanceViewModelObject;
try {
result = obj.Property.GetValue(obj.Instance, null) as ValidationModelField;
if (result == null)
{
result = new ValidationModelField();
obj.Property.SetValue(obj.Instance, result, null);
}
} catch (Exception ex) {
throw new InvalidOperationException(String.Format("Could not set property for validation field {0} on {1} (viewModelObject={2}, {3} singleton instance(s) seen, {4} collection instances seen)",
Field,
obj == null ? "null" : obj.Property.Name,
viewModelObject,
SingleInstanceViewModelObject == null ? 0 : 1,
CollectionViewModelObjects.Count
), ex);
}
return(result);
}
/// <summary>
/// Sets or adds the appropriate ViewModelObject property.
/// </summary>
public void AddViewModelObject(object instance, PropertyInfo property, bool seenOnCollection)
{
var viewModelObject = new ViewModelObject(instance, property);
if (seenOnCollection)
{
CollectionViewModelObjects.Add(viewModelObject);
}
else
{
if (SingleInstanceViewModelObject != null)
{
throw new InvalidOperationException($"Seen a single instance of {Field} on at least two non-collection objects: {SingleInstanceViewModelObject.Instance.GetType().Name} and {instance.GetType().Name}");
}
SingleInstanceViewModelObject = viewModelObject;
}
}
public ObjectTranslation()
{
InitializeComponent();
BindingContext = new ViewModelObject();
}
