/// <summary>
/// Determines the parent node. If the token has a parent, that token is bound. If not, then we
/// use the implicit parameter from the BindingState as the parent node.
/// </summary>
/// <param name="segmentToken">Token to determine the parent node for.</param>
/// <param name="state">Current state of binding.</param>
/// <returns>A SingleValueQueryNode that is the parent node of the <paramref name="segmentToken"/>.</returns>
private QueryNode DetermineParentNode(InnerPathToken segmentToken, BindingState state)
{
ExceptionUtils.CheckArgumentNotNull(segmentToken, "segmentToken");
ExceptionUtils.CheckArgumentNotNull(state, "state");
if (segmentToken.NextToken != null)
{
return(this.bindMethod(segmentToken.NextToken));
}
else
{
RangeVariable implicitRangeVariable = state.ImplicitRangeVariable;
return(NodeFactory.CreateRangeVariableReferenceNode(implicitRangeVariable));
}
}
/// <summary>
/// Try to bind an inner path token as a function call. Used for bound functions without parameters
/// that parse as inner path tokens syntactically
/// </summary>
/// <param name="innerPathToken">the end path token to bind</param>
/// <param name="parent">the parent node to this end path token.</param>
/// <param name="boundFunction">a single value function call node representing the function call, if it exists</param>
/// <returns>true if we found a function for this token, false otherwise.</returns>
internal bool TryBindInnerPathAsFunctionCall(InnerPathToken innerPathToken, QueryNode parent, out QueryNode boundFunction)
{
return(this.TryBindIdentifier(innerPathToken.Identifier, null, parent, state, out boundFunction));
}
/// <summary>
/// Binds an InnerPathToken.
/// </summary>
/// <param name="token">Token to bind.</param>
/// <returns>Either a SingleNavigationNode, CollectionNavigationNode, SinglePropertyAccessNode (complex),
/// or CollectionPropertyAccessNode (primitive or complex) that is the metadata-bound version of the given token.</returns>
protected virtual QueryNode BindInnerPathSegment(InnerPathToken token)
{
InnerPathTokenBinder innerPathTokenBinder = new InnerPathTokenBinder(this.Bind, this.BindingState);
return(innerPathTokenBinder.BindInnerPathSegment(token));
}
/// <summary>
/// Binds a <see cref="InnerPathToken"/>.
/// This includes more than just navigations - it includes complex property access and primitive collections.
/// </summary>
/// <param name="segmentToken">The segment token to bind.</param>
/// <returns>The bound node.</returns>
internal QueryNode BindInnerPathSegment(InnerPathToken segmentToken)
{
FunctionCallBinder functionCallBinder = new FunctionCallBinder(this.bindMethod, state);
// First we get the parent node
QueryNode parent = this.DetermineParentNode(segmentToken, state);
Debug.Assert(parent != null, "parent should never be null");
SingleValueNode singleValueParent = parent as SingleValueNode;
if (singleValueParent == null)
{
QueryNode boundFunction;
if (functionCallBinder.TryBindInnerPathAsFunctionCall(segmentToken, parent, out boundFunction))
{
return(boundFunction);
}
throw new ODataException(ODataErrorStrings.MetadataBinder_PropertyAccessSourceNotSingleValue(segmentToken.Identifier));
}
// Using the parent and name of this token, we try to get the IEdmProperty it represents
IEdmProperty property = BindProperty(singleValueParent.TypeReference, segmentToken.Identifier, this.Resolver);
if (property == null)
{
QueryNode boundFunction;
if (functionCallBinder.TryBindInnerPathAsFunctionCall(segmentToken, parent, out boundFunction))
{
return(boundFunction);
}
if (singleValueParent.TypeReference != null && !singleValueParent.TypeReference.Definition.IsOpen())
{
throw ExceptionUtil.CreatePropertyNotFoundException(segmentToken.Identifier, parent.GetEdmTypeReference().FullName());
}
return(new SingleValueOpenPropertyAccessNode(singleValueParent, segmentToken.Identifier));
}
IEdmStructuralProperty structuralProperty = property as IEdmStructuralProperty;
if (property.Type.IsComplex())
{
// Generate a segment to parsed segments for the parsed token
state.ParsedSegments.Add(new PropertySegment(structuralProperty));
return(new SingleComplexNode(singleValueParent as SingleResourceNode, property));
}
else if (property.Type.IsPrimitive())
{
return(new SingleValuePropertyAccessNode(singleValueParent, property));
}
// Note - this means nonentity collection (primitive or complex)
if (property.Type.IsNonEntityCollectionType())
{
if (property.Type.IsStructuredCollectionType())
{
// Generate a segment to parsed segments for the parsed token
state.ParsedSegments.Add(new PropertySegment(structuralProperty));
return(new CollectionComplexNode(singleValueParent as SingleResourceNode, property));
}
return(new CollectionPropertyAccessNode(singleValueParent, property));
}
IEdmNavigationProperty navigationProperty = property as IEdmNavigationProperty;
if (navigationProperty == null)
{
throw new ODataException(ODataErrorStrings.MetadataBinder_IllegalSegmentType(property.Name));
}
SingleResourceNode parentResource = EnsureParentIsResourceForNavProp(singleValueParent);
IEdmNavigationSource navigationSource;
QueryNode node = GetNavigationNode(navigationProperty, parentResource, segmentToken.NamedValues, state,
new KeyBinder(this.bindMethod), out navigationSource);
// Generate a segment to parsed segments for the parsed token
state.ParsedSegments.Add(new NavigationPropertySegment(navigationProperty, navigationSource));
return(node);
}
/// <summary>
/// Visits a InnerPathToken
/// </summary>
/// <param name="tokenIn">The InnerPathToken to bind</param>
/// <returns>A SingleValueNode or SingleEntityNode bound to this InnerPathToken</returns>
public virtual T Visit(InnerPathToken tokenIn)
{
throw new NotImplementedException();
}
