/// <summary>
/// Returns object1 from a link table entity given a Ria services change set and a find method.
/// </summary>
/// <typeparam name="TObject1"></typeparam>
/// <typeparam name="TObject2"></typeparam>
/// <param name="linkTableEntity"></param>
/// <param name="changeSet"></param>
/// <param name="find">function to find and retrieve an entity in a repository.</param>
/// <returns></returns>
public static TObject1 FetchObject1 <TObject1, TObject2>(
this LinkTable <TObject1, TObject2> linkTableEntity, ChangeSet changeSet,
Func <object[], TObject1> find)
where TObject1 : class
where TObject2 : class
{
var properties = TypeDescriptor.GetProperties(linkTableEntity.GetType());
var navProp = properties["Object1"];
var associationAttribute =
navProp.Attributes.OfType <AssociationAttribute>().SingleOrDefault();
return(Find(
linkTableEntity, linkTableEntity.Object1, changeSet, find, associationAttribute));
}
/// <summary>
/// Returns object1 from a link table entity given a Ria services change set and an EntityFramework DbContext.
/// </summary>
/// <typeparam name="TObject1"></typeparam>
/// <typeparam name="TObject2"></typeparam>
/// <param name="linkTableEntity"></param>
/// <param name="changeSet"></param>
/// <param name="dbContext"></param>
/// <returns></returns>
public static TObject1 FetchObject1 <TObject1, TObject2>(
this LinkTable <TObject1, TObject2> linkTableEntity, ChangeSet changeSet,
System.Data.Entity.DbContext dbContext)
where TObject1 : class where TObject2 : class
{
var properties = TypeDescriptor.GetProperties(linkTableEntity.GetType());
var navProp = properties["Object1"];
var associationAttribute =
navProp.Attributes.OfType <AssociationAttribute>().SingleOrDefault();
return(Find(
linkTableEntity, linkTableEntity.Object1, changeSet, keys => dbContext.Set <TObject1>().Find(keys),
associationAttribute));
}