/// <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>
/// <param name="navigationSource">The navigation source of the navigation node.</param>
/// <returns>A new CollectionNavigationNode or SingleNavigationNode to capture the navigation property access.</returns>
internal static QueryNode GetNavigationNode(IEdmNavigationProperty property, SingleResourceNode parent, IEnumerable <NamedValue> namedValues, BindingState state, KeyBinder keyBinder, out IEdmNavigationSource navigationSource)
{
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(parent, property, state.ParsedSegments);
navigationSource = collectionNavigationNode.NavigationSource;
// 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 collection");
// Otherwise it's a single navigation property
SingleNavigationNode singleNavigationNode = new SingleNavigationNode(parent, property, state.ParsedSegments);
navigationSource = singleNavigationNode.NavigationSource;
return(singleNavigationNode);
}
protected string Bind(QueryNode node)
{
CollectionNode collectionNode = node as CollectionNode;
SingleValueNode singleValueNode = node as SingleValueNode;
if (collectionNode != null)
{
switch (node.Kind)
{
case QueryNodeKind.CollectionNavigationNode:
CollectionNavigationNode navigationNode = node as CollectionNavigationNode;
return(BindNavigationPropertyNode(navigationNode.Source, navigationNode.NavigationProperty));
case QueryNodeKind.CollectionPropertyAccess:
return(BindCollectionPropertyAccessNode(node as CollectionPropertyAccessNode));
}
}
else if (singleValueNode != null)
{
switch (node.Kind)
{
case QueryNodeKind.BinaryOperator:
return(BindBinaryOperatorNode(node as BinaryOperatorNode));
case QueryNodeKind.Constant:
return(BindConstantNode(node as ConstantNode));
case QueryNodeKind.Convert:
return(BindConvertNode(node as ConvertNode));
//case QueryNodeKind.EntityRangeVariableReference:
// return BindRangeVariable((node as EntityRangeVariableReferenceNode).RangeVariable);
//case QueryNodeKind.NonentityRangeVariableReference:
// return BindRangeVariable((node as NonentityRangeVariableReferenceNode).RangeVariable);
case QueryNodeKind.SingleValuePropertyAccess:
return(BindPropertyAccessQueryNode(node as SingleValuePropertyAccessNode));
case QueryNodeKind.UnaryOperator:
return(BindUnaryOperatorNode(node as UnaryOperatorNode));
case QueryNodeKind.SingleValueFunctionCall:
return(BindSingleValueFunctionCallNode(node as SingleValueFunctionCallNode));
case QueryNodeKind.SingleNavigationNode:
SingleNavigationNode navigationNode = node as SingleNavigationNode;
return(BindNavigationPropertyNode(navigationNode.Source, navigationNode.NavigationProperty));
case QueryNodeKind.Any:
return(BindAnyNode(node as AnyNode));
case QueryNodeKind.All:
return(BindAllNode(node as AllNode));
}
}
throw new NotSupportedException(String.Format("Nodes of type {0} are not supported", node.Kind));
}
/// <summary>
/// Visit a SingleNavigationNode
/// </summary>
/// <param name="nodeIn">the node to visit</param>
/// <returns>Defined by the implementer</returns>
public virtual T Visit(SingleNavigationNode nodeIn)
{
throw new NotImplementedException();
}
