/// <summary>
/// Created a SingleEntityCastNode with the given source node and the given type to cast to.
/// </summary>
/// <param name="source"> Source <see cref="SingleValueNode"/> that is being cast.</param>
/// <param name="entityType">Type to cast to.</param>
/// <exception cref="System.ArgumentNullException">Throws if the input entityType is null.</exception>
public SingleEntityCastNode(SingleEntityNode source, IEdmEntityType entityType)
{
ExceptionUtils.CheckArgumentNotNull(entityType, "entityType");
this.source = source;
this.navigationSource = source != null ? source.NavigationSource : null;
this.entityTypeReference = new EdmEntityTypeReference(entityType, false);
}
/// <summary>
/// Creates a CollectionNavigationNode.
/// </summary>
/// <param name="navigationProperty">The navigation property that defines the collection node.</param>
/// <param name="source">The parent of this collection navigation node.</param>
/// <returns>The collection node.</returns>
/// <exception cref="System.ArgumentNullException">Throws if the input source or navigation property is null.</exception>
/// <exception cref="ArgumentException">Throws if the input navigation doesn't target a collection.</exception>
public CollectionNavigationNode(IEdmNavigationProperty navigationProperty, SingleEntityNode source)
: this(navigationProperty)
{
ExceptionUtils.CheckArgumentNotNull(source, "source");
this.source = source;
this.navigationSource = source.NavigationSource != null?source.NavigationSource.FindNavigationTarget(navigationProperty) : null;
}
/// <summary>
/// Constructs a SingleNavigationNode.
/// </summary>
/// <param name="navigationProperty">The navigation property this node represents.</param>
/// <param name="source">The previous node in the path.</param>
/// <exception cref="System.ArgumentNullException">Throws if the input navigationProperty or source is null.</exception>
/// <exception cref="ArgumentException">Throws if the input navigationProperty targets more than one entity.</exception>
public SingleNavigationNode(IEdmNavigationProperty navigationProperty, SingleEntityNode source)
{
ExceptionUtils.CheckArgumentNotNull(navigationProperty, "navigationProperty");
ExceptionUtils.CheckArgumentNotNull(source, "source");
EdmMultiplicity multiplicity = navigationProperty.TargetMultiplicityTemporary();
if (multiplicity != EdmMultiplicity.One && multiplicity != EdmMultiplicity.ZeroOrOne)
{
throw new ArgumentException(ODataErrorStrings.Nodes_CollectionNavigationNode_MustHaveSingleMultiplicity);
}
this.source = source;
this.navigationProperty = navigationProperty;
this.entityTypeReference = (IEdmEntityTypeReference)this.NavigationProperty.Type;
this.navigationSource = source.NavigationSource != null?source.NavigationSource.FindNavigationTarget(navigationProperty) : null;
}
/// <summary>
/// Builds an appropriate navigation query node (collection or single) for the given property and parent node.
/// </summary>
/// <param name="property">Navigation property.</param>
/// <param name="parent">Parent Node.</param>
/// <param name="namedValues">Named values (key values) that were included in the node we are binding, if any.</param>
/// <param name="state">State of binding.</param>
/// <param name="keyBinder">Object to perform binding on any key values that are present.</param>
/// <returns>A new CollectionNavigationNode or SingleNavigationNode to capture the navigation propety access.</returns>
internal static QueryNode GetNavigationNode(IEdmNavigationProperty property, SingleEntityNode parent, IEnumerable<NamedValue> namedValues, BindingState state, KeyBinder keyBinder)
{
ExceptionUtils.CheckArgumentNotNull(property, "property");
ExceptionUtils.CheckArgumentNotNull(parent, "parent");
ExceptionUtils.CheckArgumentNotNull(state, "state");
ExceptionUtils.CheckArgumentNotNull(keyBinder, "keyBinder");
// Handle collection navigation property
if (property.TargetMultiplicity() == EdmMultiplicity.Many)
{
CollectionNavigationNode collectionNavigationNode = new CollectionNavigationNode(property, parent);
// Doing key lookup on the collection navigation property
if (namedValues != null)
{
return keyBinder.BindKeyValues(collectionNavigationNode, namedValues, state.Model);
}
// Otherwise it's just a normal collection of entities
return collectionNavigationNode;
}
Debug.Assert(namedValues == null || !namedValues.Any(), "namedValues should not exist if it isn't a colleciton");
// Otherwise it's a single navigation property
return new SingleNavigationNode(property, parent);
}
private string BindNavigationPropertyNode(SingleEntityNode singleEntityNode, IEdmNavigationProperty edmNavigationProperty)
{
return Bind(singleEntityNode) + "." + edmNavigationProperty.Name;
}
