public override PathMatch Matches(PathDefinitionIterator definitionSteps, PathIterator step)
{
if (!step.HasStep || !step.IsCollection)
{
return(PathMatch.Fail());
}
IVMCollection parentCollection = step.Collection;
step.MoveNext();
if (!step.HasStep || !step.IsProperty)
{
return(PathMatch.Fail());
}
if (!(parentCollection.GetItemDescriptor() is TDescriptor))
{
return(PathMatch.Fail());
}
var itemDescriptor = parentCollection.GetItemDescriptor();
var expectedProperty = _propertySelector.GetProperty(itemDescriptor);
if (expectedProperty == step.Property)
{
PathMatch result = PathMatch.Succeed(length: 1);
PathMatch nextResult = definitionSteps.MatchesNext(step);
return(PathMatch.Combine(result, nextResult));
}
return(PathMatch.Fail());
}
public override PathMatch Matches(PathDefinitionIterator definitionSteps, PathIterator step)
{
if (!step.HasStep || !step.IsViewModel)
{
return(PathMatch.Fail());
}
IViewModel parentViewModel = step.ViewModel;
step.MoveNext();
if (!step.HasStep || !step.IsCollection)
{
return(PathMatch.Fail());
}
if (!(parentViewModel.Descriptor is TDescriptor))
{
return(PathMatch.Fail());
}
var descriptor = (TDescriptor)parentViewModel.Descriptor;
var collectionProperty = (IVMPropertyDescriptor)_propertySelector.GetProperty(descriptor); // HACK ATTACK
if (!parentViewModel.Kernel.IsLoaded(collectionProperty))
{
return(PathMatch.Fail());
}
var expectedCollection = parentViewModel.Kernel.GetValue(collectionProperty);
if (step.Collection == expectedCollection)
{
PathMatch result = PathMatch.Succeed(length: 1);
PathMatch nextResult = definitionSteps.MatchesNext(step);
return(PathMatch.Combine(result, nextResult));
}
else
{
return(PathMatch.Fail());
}
}
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);
}