/// <summary>
/// Parses the next OData path segment following an entity.
/// </summary>
/// <param name="model">The model to use for path parsing.</param>
/// <param name="previous">The previous path segment.</param>
/// <param name="previousEdmType">The EDM type of the OData path up to the previous segment.</param>
/// <param name="segment">The value of the segment to parse.</param>
/// <param name="segments">The queue of pending segments.</param>
/// <returns>A parsed representation of the segment.</returns>
protected virtual ODataPathSegment ParseAtEntity(IEdmModel model, ODataPathSegment previous,
IEdmType previousEdmType, string segment, Queue<string> segments)
{
if (previous == null)
{
throw Error.ArgumentNull("previous");
}
if (segments == null)
{
throw Error.ArgumentNull("segments");
}
if (String.IsNullOrEmpty(segment))
{
throw Error.Argument(SRResources.SegmentNullOrEmpty);
}
IEdmEntityType previousType = previousEdmType as IEdmEntityType;
if (previousType == null)
{
throw Error.Argument(SRResources.PreviousSegmentMustBeEntityType, previousEdmType);
}
// first look for navigation properties
IEdmNavigationProperty navigation = previousType.NavigationProperties().SingleOrDefault(np => np.Name == segment);
if (navigation != null)
{
return new NavigationPathSegment(navigation);
}
// next look for properties
IEdmProperty property = previousType.Properties().SingleOrDefault(p => p.Name == segment);
if (property != null)
{
return new PropertyAccessPathSegment(property);
}
// next look for type casts
IEdmEntityType castType = model.FindDeclaredType(segment) as IEdmEntityType;
if (castType != null)
{
if (!castType.IsOrInheritsFrom(previousType) && !previousType.IsOrInheritsFrom(castType))
{
throw new ODataException(Error.Format(SRResources.InvalidCastInPath, castType, previousType));
}
return new CastPathSegment(castType);
}
// look for $ref
if (segment == ODataSegmentKinds.Ref)
{
return new RefPathSegment();
}
// finally look for bindable procedures
IEdmAction action = model.FindAction(segment, previousType);
if (action != null)
{
return new BoundActionPathSegment(action);
}
// Try to match this to a function call
BoundFunctionPathSegment pathSegment = TryMatchBoundFunctionCall(segment, segments, model, bindingType: previousType);
if (pathSegment != null)
{
return pathSegment;
}
// Treating as an open property
return new UnresolvedPathSegment(segment);
}
/// <summary>
/// Parses the next OData path segment following an entity.
/// </summary>
/// <param name="model">The model to use for path parsing.</param>
/// <param name="previous">The previous path segment.</param>
/// <param name="previousEdmType">The EDM type of the OData path up to the previous segment.</param>
/// <param name="segment">The value of the segment to parse.</param>
/// <param name="segments">The queue of pending segments.</param>
/// <returns>A parsed representation of the segment.</returns>
protected virtual ODataPathSegment ParseAtEntity(IEdmModel model, ODataPathSegment previous,
IEdmType previousEdmType, string segment, Queue <string> segments)
{
if (previous == null)
{
throw Error.ArgumentNull("previous");
}
if (segments == null)
{
throw Error.ArgumentNull("segments");
}
if (String.IsNullOrEmpty(segment))
{
throw Error.Argument(SRResources.SegmentNullOrEmpty);
}
IEdmEntityType previousType = previousEdmType as IEdmEntityType;
if (previousType == null)
{
throw Error.Argument(SRResources.PreviousSegmentMustBeEntityType, previousEdmType);
}
// first look for navigation properties
IEdmNavigationProperty navigation = previousType.NavigationProperties().SingleOrDefault(np => np.Name == segment);
if (navigation != null)
{
return(new NavigationPathSegment(navigation));
}
// next look for properties
IEdmProperty property = previousType.Properties().SingleOrDefault(p => p.Name == segment);
if (property != null)
{
return(new PropertyAccessPathSegment(property));
}
// next look for type casts
IEdmEntityType castType = model.FindDeclaredType(segment) as IEdmEntityType;
if (castType != null)
{
if (!castType.IsOrInheritsFrom(previousType) && !previousType.IsOrInheritsFrom(castType))
{
throw new ODataException(Error.Format(SRResources.InvalidCastInPath, castType, previousType));
}
return(new CastPathSegment(castType));
}
// look for $ref
if (segment == ODataSegmentKinds.Ref)
{
return(new RefPathSegment());
}
// finally look for bindable procedures
IEdmAction action = model.FindAction(segment, previousType);
if (action != null)
{
return(new BoundActionPathSegment(action));
}
// Try to match this to a function call
BoundFunctionPathSegment pathSegment = TryMatchBoundFunctionCall(segment, segments, model, bindingType: previousType);
if (pathSegment != null)
{
return(pathSegment);
}
// Treating as an open property
return(new UnresolvedPathSegment(segment));
}
/// <summary>
/// Parses the next OData path segment following an entity collection.
/// </summary>
/// <param name="model">The model to use for path parsing.</param>
/// <param name="previous">The previous path segment.</param>
/// <param name="previousEdmType">The EDM type of the OData path up to the previous segment.</param>
/// <param name="segment">The value of the segment to parse.</param>
/// <param name="segments">The queue of pending segments.</param>
/// <returns>A parsed representation of the segment.</returns>
protected virtual ODataPathSegment ParseAtEntityCollection(IEdmModel model, ODataPathSegment previous,
IEdmType previousEdmType, string segment, Queue<string> segments)
{
if (previous == null)
{
throw Error.ArgumentNull("previous");
}
if (segments == null)
{
throw Error.ArgumentNull("segments");
}
if (String.IsNullOrEmpty(segment))
{
throw Error.Argument(SRResources.SegmentNullOrEmpty);
}
if (previousEdmType == null)
{
throw Error.InvalidOperation(SRResources.PreviousSegmentEdmTypeCannotBeNull);
}
IEdmCollectionType collectionType = previousEdmType as IEdmCollectionType;
if (collectionType == null)
{
throw Error.Argument(SRResources.PreviousSegmentMustBeEntityCollectionType, previousEdmType);
}
IEdmEntityType elementType = collectionType.ElementType.Definition as IEdmEntityType;
if (elementType == null)
{
throw Error.Argument(SRResources.PreviousSegmentMustBeEntityCollectionType, previousEdmType);
}
// look for keys first.
if (segment.StartsWith("(", StringComparison.Ordinal) && segment.EndsWith(")", StringComparison.Ordinal))
{
Contract.Assert(segment.Length >= 2);
string value = segment.Substring(1, segment.Length - 2);
return new KeyValuePathSegment(value);
}
// next look for casts
IEdmEntityType castType = model.FindDeclaredType(segment) as IEdmEntityType;
if (castType != null)
{
IEdmType previousElementType = collectionType.ElementType.Definition;
if (!castType.IsOrInheritsFrom(previousElementType) && !previousElementType.IsOrInheritsFrom(castType))
{
throw new ODataException(Error.Format(SRResources.InvalidCastInPath, castType, previousElementType));
}
return new CastPathSegment(castType);
}
// look for $ref
if (segment == ODataSegmentKinds.Ref)
{
return new RefPathSegment();
}
// now look for bindable actions
IEdmAction action = model.FindAction(segment, collectionType);
if (action != null)
{
return new BoundActionPathSegment(action);
}
// Try to match this to a function call
BoundFunctionPathSegment pathSegment = TryMatchBoundFunctionCall(segment, segments, model, bindingType: collectionType);
if (pathSegment != null)
{
return pathSegment;
}
throw new ODataException(Error.Format(SRResources.NoActionFoundForCollection, segment, collectionType.ElementType));
}
/// <summary>
/// Parses the next OData path segment following an entity collection.
/// </summary>
/// <param name="model">The model to use for path parsing.</param>
/// <param name="previous">The previous path segment.</param>
/// <param name="previousEdmType">The EDM type of the OData path up to the previous segment.</param>
/// <param name="segment">The value of the segment to parse.</param>
/// <param name="segments">The queue of pending segments.</param>
/// <returns>A parsed representation of the segment.</returns>
protected virtual ODataPathSegment ParseAtEntityCollection(IEdmModel model, ODataPathSegment previous,
IEdmType previousEdmType, string segment, Queue <string> segments)
{
if (previous == null)
{
throw Error.ArgumentNull("previous");
}
if (segments == null)
{
throw Error.ArgumentNull("segments");
}
if (String.IsNullOrEmpty(segment))
{
throw Error.Argument(SRResources.SegmentNullOrEmpty);
}
if (previousEdmType == null)
{
throw Error.InvalidOperation(SRResources.PreviousSegmentEdmTypeCannotBeNull);
}
IEdmCollectionType collectionType = previousEdmType as IEdmCollectionType;
if (collectionType == null)
{
throw Error.Argument(SRResources.PreviousSegmentMustBeEntityCollectionType, previousEdmType);
}
IEdmEntityType elementType = collectionType.ElementType.Definition as IEdmEntityType;
if (elementType == null)
{
throw Error.Argument(SRResources.PreviousSegmentMustBeEntityCollectionType, previousEdmType);
}
// look for keys first.
if (segment.StartsWith("(", StringComparison.Ordinal) && segment.EndsWith(")", StringComparison.Ordinal))
{
Contract.Assert(segment.Length >= 2);
string value = segment.Substring(1, segment.Length - 2);
return(new KeyValuePathSegment(value));
}
// next look for casts
IEdmEntityType castType = model.FindDeclaredType(segment) as IEdmEntityType;
if (castType != null)
{
IEdmType previousElementType = collectionType.ElementType.Definition;
if (!castType.IsOrInheritsFrom(previousElementType) && !previousElementType.IsOrInheritsFrom(castType))
{
throw new ODataException(Error.Format(SRResources.InvalidCastInPath, castType, previousElementType));
}
return(new CastPathSegment(castType));
}
// look for $ref
if (segment == ODataSegmentKinds.Ref)
{
return(new RefPathSegment());
}
// now look for bindable actions
IEdmAction action = model.FindAction(segment, collectionType);
if (action != null)
{
return(new BoundActionPathSegment(action));
}
// Try to match this to a function call
BoundFunctionPathSegment pathSegment = TryMatchBoundFunctionCall(segment, segments, model, bindingType: collectionType);
if (pathSegment != null)
{
return(pathSegment);
}
throw new ODataException(Error.Format(SRResources.NoActionFoundForCollection, segment, collectionType.ElementType));
}