public LazyList(ILazyLoadResolver <IEnumerable <T> > resolver, LazyLoadParameter parameter = null)
{
_resolver = resolver;
_parameter = parameter ?? LazyLoadParameter.Null;
_list = new List <T>();
_isLoaded = false;
}
private async Task <T> InternalResolveAsync(LazyLoadParameter parameter)
{
var resolved = await LoadAsync(parameter);
if (resolved != null)
{
_resolvedObjects.Add(parameter, resolved);
}
return(resolved);
}
public Task <T> ResolveAsync(LazyLoadParameter parameter)
{
if (parameter == null)
{
throw new ArgumentNullException(nameof(parameter));
}
if (_resolvedObjects.TryGetValue(parameter, out var resolved))
{
return(Task.FromResult(resolved));
}
return(InternalResolveAsync(parameter));
}
public IList <T> Create <T>(LazyLoadParameter parameter)
{
var resolver = (ILazyLoadResolver <IEnumerable <T> >)_provider.GetService(typeof(ILazyLoadResolver <IEnumerable <T> >));
return(new LazyList <T>(resolver, parameter));
}
protected abstract Task <T> LoadAsync(LazyLoadParameter parameter);
public T Resolve(LazyLoadParameter parameter)
{
return(ResolveAsync(parameter).GetAwaiter().GetResult());
}
protected override async Task <T> LoadAsync(LazyLoadParameter parameter)
{
return(await _resolveAsync(parameter));
}