/// <summary>
/// Traverses through the provided resource and returns the
/// value of the relationship on the other side of a through type
/// (e.g. Articles.ArticleTags.Tag).
/// </summary>
public override object GetValue(object resource)
{
IEnumerable throughResources = (IEnumerable)ThroughProperty.GetValue(resource) ?? Array.Empty <object>();
IEnumerable <object> rightResources = throughResources
.Cast <object>()
.Select(rightResource => RightProperty.GetValue(rightResource));
return(rightResources.CopyToTypedCollection(Property.PropertyType));
}
/// <summary>
/// Traverses through the provided entity and returns the
/// value of the relationship on the other side of a join entity
/// (e.g. Articles.ArticleTags.Tag).
/// </summary>
public override object GetValue(object entity)
{
IEnumerable joinEntities = (IEnumerable)ThroughProperty.GetValue(entity) ?? Array.Empty <object>();
IEnumerable <object> rightEntities = joinEntities
.Cast <object>()
.Select(rightEntity => RightProperty.GetValue(rightEntity));
return(rightEntities.CopyToTypedCollection(PropertyInfo.PropertyType));
}
/// <summary>
/// Traverses through the provided resource and returns the value of the relationship on the other side of the through type.
/// In the example described above, this would be the value of "Articles.ArticleTags.Tag".
/// </summary>
public override object GetValue(object resource)
{
if (resource == null)
{
throw new ArgumentNullException(nameof(resource));
}
IEnumerable throughResources = (IEnumerable)ThroughProperty.GetValue(resource) ?? Array.Empty <object>();
IEnumerable <object> rightResources = throughResources
.Cast <object>()
.Select(rightResource => RightProperty.GetValue(rightResource));
return(TypeHelper.CopyToTypedCollection(rightResources, Property.PropertyType));
}
/// <summary>
/// Traverses through the provided resource and returns the value of the relationship on the other side of the through type.
/// In the example described above, this would be the value of "Articles.ArticleTags.Tag".
/// </summary>
public override object GetValue(object resource)
{
ArgumentGuard.NotNull(resource, nameof(resource));
var throughEntity = ThroughProperty.GetValue(resource);
if (throughEntity == null)
{
return(null);
}
IEnumerable <object> rightResources = ((IEnumerable)throughEntity)
.Cast <object>()
.Select(rightResource => RightProperty.GetValue(rightResource));
return(TypeHelper.CopyToTypedCollection(rightResources, Property.PropertyType));
}
/// <summary>
/// Traverses the through the provided entity and returns the
/// value of the relationship on the other side of a join entity
/// (e.g. Articles.ArticleTags.Tag).
/// </summary>
public override object GetValue(object entity)
{
var throughNavigationProperty = entity.GetType()
.GetProperties()
.SingleOrDefault(p => string.Equals(p.Name, InternalThroughName, StringComparison.OrdinalIgnoreCase));
var throughEntities = throughNavigationProperty.GetValue(entity);
if (throughEntities == null)
{
// return an empty list for the right-type of the property.
return(TypeHelper.CreateListFor(RightType));
}
// the right entities are included on the navigation/through entities. Extract and return them.
var rightEntities = new List <IIdentifiable>();
foreach (var rightEntity in (IList)throughEntities)
{
rightEntities.Add((IIdentifiable)RightProperty.GetValue(rightEntity));
}
return(rightEntities.Cast(RightType));
}