/// <summary>
/// Constructs an instance of an <see cref="NavigationSourceLinkBuilderAnnotation" /> class.
/// </summary>
/// <param name="navigationSource">The navigation source for which the link builder is being constructed.</param>
/// <param name="idLinkBuilder">The ID link builder which is used to build the ID link.</param>
/// <param name="editLinkBuilder">The Edit link builder which is used to build the Edit link.</param>
/// <param name="readLinkBuilder">The Read link builder which is used to build the Read link.</param>
public NavigationSourceLinkBuilderAnnotation(
IEdmNavigationSource navigationSource,
SelfLinkBuilder <Uri> idLinkBuilder,
SelfLinkBuilder <Uri> editLinkBuilder,
SelfLinkBuilder <Uri> readLinkBuilder)
{
if (navigationSource == null)
{
throw new ArgumentNullException(nameof(navigationSource));
}
_idLinkBuilder = idLinkBuilder;
_editLinkBuilder = editLinkBuilder;
_readLinkBuilder = readLinkBuilder;
}
/// <summary>
/// Initializes a new instance of the <see cref="NavigationSourceLinkBuilderAnnotation"/> class.
/// </summary>
/// <param name="navigationSource">The navigation source for which the link builder is being constructed.</param>
/// <param name="model">The EDM model that this navigation source belongs to.</param>
/// <remarks>This constructor creates a link builder that generates URL's that follow OData conventions for the given navigation source.</remarks>
public NavigationSourceLinkBuilderAnnotation(IEdmNavigationSource navigationSource, IEdmModel model)
{
if (navigationSource == null)
{
throw Error.ArgumentNull(nameof(navigationSource));
}
if (model == null)
{
throw Error.ArgumentNull(nameof(model));
}
IEdmEntityType elementType = navigationSource.EntityType();
IEnumerable <IEdmEntityType> derivedTypes = model.FindAllDerivedTypes(elementType).Cast <IEdmEntityType>();
// Add navigation link builders for all navigation properties of entity.
foreach (IEdmNavigationProperty navigationProperty in elementType.NavigationProperties())
{
Func <ResourceContext, IEdmNavigationProperty, Uri> navigationLinkFactory =
(resourceContext, navProperty) => resourceContext.GenerateNavigationPropertyLink(navProperty, includeCast: false);
AddNavigationPropertyLinkBuilder(navigationProperty, new NavigationLinkBuilder(navigationLinkFactory, followsConventions: true));
}
// Add navigation link builders for all navigation properties in derived types.
bool derivedTypesDefineNavigationProperty = false;
foreach (IEdmEntityType derivedEntityType in derivedTypes)
{
foreach (IEdmNavigationProperty navigationProperty in derivedEntityType.DeclaredNavigationProperties())
{
derivedTypesDefineNavigationProperty = true;
Func <ResourceContext, IEdmNavigationProperty, Uri> navigationLinkFactory =
(resourceContext, navProperty) => resourceContext.GenerateNavigationPropertyLink(navProperty, includeCast: true);
AddNavigationPropertyLinkBuilder(navigationProperty, new NavigationLinkBuilder(navigationLinkFactory, followsConventions: true));
}
}
Func <ResourceContext, Uri> selfLinkFactory =
(resourceContext) => resourceContext.GenerateSelfLink(includeCast: derivedTypesDefineNavigationProperty);
IdLinkBuilder = new SelfLinkBuilder <Uri>(selfLinkFactory, followsConventions: true);
}
/// <summary>
/// Sets the Read link builder for the given <see cref="IEdmNavigationSource"/>.
/// </summary>
/// <param name="model">The Edm model.</param>
/// <param name="navigationSource">The navigation source.</param>
/// <param name="readLinkBuilder">The Read link builder.</param>
public static void HasReadLink(this IEdmModel model, IEdmNavigationSource navigationSource, SelfLinkBuilder <Uri> readLinkBuilder)
{
NavigationSourceLinkBuilderAnnotation annotation = model.GetNavigationSourceLinkBuilder(navigationSource);
Contract.Assert(annotation != null);
annotation.ReadLinkBuilder = readLinkBuilder;
}