/// <summary>
/// Constructor that accepts type name.
/// </summary>
/// <param name="typeName">Type name.</param>
/// <param name="factoryDelegate">Factory delegate to create objects of this type.</param>
public TypeHelper(string typeName, Func <object[], object> factoryDelegate = null)
{
_isRuntimeType = true;
_factoryDelegate = factoryDelegate ?? (args => VMController.CreateInstance(Type, args));
Name = typeName.Contains(".") ? typeName.Split('.').Last() : typeName;
FullName = typeName;
}
/// <summary>
/// Constructor that accepts type.
/// </summary>
/// <param name="type">Type.</param>
public TypeHelper(Type type)
{
Type = type;
Name = type.Name;
FullName = type.FullName;
_factoryDelegate = args => VMController.CreateInstance(Type, args);
}
/// <summary>
/// Constructor that accepts type.
/// </summary>
/// <param name="type">Type.</param>
/// <param name="factoryDelegate">Factory delegate to create objects of this type.</param>
public TypeHelper(Type type, Func <object[], object> factoryDelegate = null)
{
Type = type;
Name = type.Name;
FullName = type.FullName;
_factoryDelegate = factoryDelegate ?? (args => VMController.CreateInstance(Type, args));
}
/// <summary>
/// Creates a view model instance.
/// </summary>
/// <param name="registeredTypes">Registered view model types.</param>
/// <param name="vmTypeName">View model type name.</param>
/// <param name="vmInstanceId">Optional view model instance identifier.</param>
/// <param name="vmNamespace">Optional view model type namespace.</param>
/// <returns></returns>
internal static BaseVM Create(IEnumerable <Type> registeredTypes, string vmTypeName, string vmInstanceId = null, string vmNamespace = null)
{
Type vmType = vmNamespace != null?
registeredTypes.FirstOrDefault(i => i.FullName == $"{vmNamespace}.{vmTypeName}") :
registeredTypes.FirstOrDefault(i => i.Name == vmTypeName);
if (vmType == null)
{
return(null);
}
try
{
if (vmInstanceId != null)
{
var instance = VMController.CreateInstance(vmType, new object[] { vmInstanceId }) as INotifyPropertyChanged;
if (instance != null)
{
return(instance is BaseVM ? instance as BaseVM : new BaseVM(instance));
}
}
}
catch (MissingMethodException)
{
Trace.Fail($"[dotNetify] ERROR: '{vmTypeName}' has no constructor accepting instance ID.");
}
try
{
var instance = VMController.CreateInstance(vmType, null) as INotifyPropertyChanged;
if (instance != null)
{
return(instance is BaseVM ? instance as BaseVM : new BaseVM(instance));
}
}
catch (MissingMethodException)
{
Trace.Fail($"[dotNetify] ERROR: '{vmTypeName}' has no parameterless constructor.");
}
return(null);
}
