/// <summary>
/// Gets the short name of the entity for the context
/// </summary>
/// <param name="context">The context object which directly or indirectly points to an entry</param>
/// <returns>The short name of entity</returns>
public static string GetEntityName(ServiceContext context)
{
string entityName = context.EntityTypeShortName;
if (string.IsNullOrEmpty(entityName))
{
var edmxHelper = new EdmxHelper(XElement.Parse(context.MetadataDocument));
var segments = ResourcePathHelper.GetPathSegments(context);
var segsToEntity = GetEntryUriSegments(segments.Take(segments.Count() - 1), edmxHelper);
UriType uriType;
var target = edmxHelper.GetTargetType(segsToEntity, out uriType);
entityName = ((EntityType)target).Name;
}
return(entityName);
}
/// <summary>
/// Gets the target MetadataItem for sequence of uri path segments
/// </summary>
/// <param name="edmxHelper">The EdmxHelper class object</param>
/// <param name="pathSegment">The sequence of uri path segment</param>
/// <param name="uriType">Output parameter of UriType</param>
/// <returns>The target MetadataItem for the uri path segments; or null if a meaningful one cannot be derived</returns>
public static MetadataItem GetTargetType(this EdmxHelper edmxHelper, IEnumerable <string> pathSegment, out UriType uriType)
{
EntityContainer currContainer;
string leadSegment = pathSegment.First();
var containers = from c in edmxHelper.containers where c.Name.Equals(leadSegment, System.StringComparison.Ordinal) select c;
if (!containers.Any())
{
// get the default container
currContainer = edmxHelper.containerDefault;
}
else
{
currContainer = containers.First();
pathSegment = pathSegment.Skip(1);
}
UriType uType = UriType.URIUNKNOWN;
var result = GetTargetType(currContainer, pathSegment, ref uType);
uriType = uType;
return(result);
}
/// <summary>
/// Gets the segments pointing to an entry based
/// </summary>
/// <param name="segments">The segments pointing to derived resources of the entry</param>
/// <param name="edmxHelper">The EdmxHelper instance</param>
/// <returns>The segments pointing to the entry</returns>
public static IEnumerable <string> GetEntryUriSegments(IEnumerable <string> segments, EdmxHelper edmxHelper)
{
if (!segments.Any())
{
return(segments);
}
UriType uriType;
var target = edmxHelper.GetTargetType(segments, out uriType);
if (uriType == UriType.URI2)
{
return(segments);
}
return(GetEntryUriSegments(segments.Take(segments.Count() - 1), edmxHelper));
}
