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());
}
private bool Matches(IVMCollection collection, PathIterator nextStep)
{
bool canMatchAgainstItemDescriptor = nextStep.IsProperty;
if (!canMatchAgainstItemDescriptor)
{
return(false);
}
if (!(collection.GetItemDescriptor() is TDescriptor))
{
return(false);
}
TDescriptor itemDescriptor = (TDescriptor)collection.GetItemDescriptor();
return(_propertySelector.GetProperty(itemDescriptor) == nextStep.Property);
}
public IValidatorInvocationBuilder Targeting <TDescriptor>(
IVMCollectionExpression <IViewModel <TDescriptor> > target,
Func <TDescriptor, IVMPropertyDescriptor> targetPropertySelector
) where TDescriptor : IVMDescriptor
{
_targetCollection = (IVMCollection)target;
_targetProperty = targetPropertySelector((TDescriptor)_targetCollection.GetItemDescriptor());
return(this);
}