/// <summary>
/// Try to bind the idenfier as property segment,
/// Append it into path.
/// </summary>
private static bool TryBindPropertySegment(string identifier, string parenthesisExpressions, IEdmModel model,
IList <PathSegment> path,
PathParserSettings settings)
{
PathSegment preSegment = path.LastOrDefault();
if (preSegment == null || !preSegment.IsSingle)
{
return(false);
}
IEdmStructuredType structuredType = preSegment.EdmType as IEdmStructuredType;
if (structuredType == null)
{
return(false);
}
IEdmProperty property = structuredType.ResolveProperty(identifier, settings.EnableCaseInsensitive);
if (property == null)
{
return(false);
}
PathSegment segment;
if (property.PropertyKind == EdmPropertyKind.Navigation)
{
var navigationProperty = (IEdmNavigationProperty)property;
IEdmNavigationSource navigationSource = null;
if (preSegment.NavigationSource != null)
{
IEdmPathExpression bindingPath;
navigationSource = preSegment.NavigationSource.FindNavigationTarget(navigationProperty, path, out bindingPath);
}
// Relationship between TargetMultiplicity and navigation property:
// 1) EdmMultiplicity.Many <=> collection navigation property
// 2) EdmMultiplicity.ZeroOrOne <=> nullable singleton navigation property
// 3) EdmMultiplicity.One <=> non-nullable singleton navigation property
segment = new NavigationSegment(navigationProperty, navigationSource, identifier);
}
else
{
segment = new PropertySegment((IEdmStructuralProperty)property, preSegment.NavigationSource, identifier);
}
path.Add(segment);
if (parenthesisExpressions != null && !property.Type.IsCollection() && !property.Type.AsCollection().ElementType().IsEntity())
{
throw new Exception($"Invalid '{parenthesisExpressions}' after property '{identifier}'.");
}
TryBindKeySegment(parenthesisExpressions, path);
return(true);
}
/// <inheritdoc/>
public override bool Match(PathSegment other)
{
NavigationSegment otherNavigationSegment = other as NavigationSegment;
if (otherNavigationSegment == null)
{
return(false);
}
return(ReferenceEquals(NavigationProperty, otherNavigationSegment.NavigationProperty));
}