public override IViewModel[] GetDescendants(
PathDefinitionIterator definitionSteps,
IViewModel rootVM,
bool onlyLoaded
)
{
var property = _propertySelector.GetProperty(rootVM.Descriptor);
if (onlyLoaded && !rootVM.Kernel.IsLoaded(property))
{
return(new IViewModel[0]);
}
var instance = rootVM.Kernel.GetValue(property);
if (PropertyTypeHelper.IsViewModelCollection(property.PropertyType))
{
if (instance == null)
{
return(new IViewModel[0]);
}
var collection = (IVMCollection)instance;
return(((IVMCollection)instance)
.Cast <IViewModel>()
.SelectMany(x => definitionSteps.GetDescendantNext(x, onlyLoaded))
.ToArray());
}
else if (PropertyTypeHelper.IsViewModel(property.PropertyType))
{
if (instance == null)
{
return(new IViewModel[0]);
}
return(definitionSteps.GetDescendantNext((IViewModel)instance, onlyLoaded));
}
throw new NotSupportedException(ExceptionTexts.GetDescaedantsWrongPropertyStepType);
}
public IViewModel[] GetLoadedDescendants(IViewModel rootVM)
{
var it = new PathDefinitionIterator(_steps);
return(it.GetDescendantNext(rootVM, onlyLoaded: true));
}
