/// <summary>
/// Generates either the default stream link or a named stream link based on whether the given stream name is null
/// </summary>
/// <param name="generator">The generator to extend</param>
/// <param name="instance">The entity instance</param>
/// <param name="streamName">The stream's name or null to indicate the default stream</param>
/// <returns>The convention-based stream edit link</returns>
public static string GenerateStreamEditLink(this IODataConventionBasedLinkGenerator generator, QueryStructuralValue instance, string streamName)
{
if (streamName == null)
{
return(generator.GenerateDefaultStreamEditLink(instance));
}
else
{
return(generator.GenerateNamedStreamEditLink(instance, streamName));
}
}
private static string EnsureIsEntityAndCall(this IODataConventionBasedLinkGenerator generator, QueryStructuralValue instance, Func <EntitySet, EntityType, IEnumerable <NamedValue>, string> callback)
{
ExceptionUtilities.CheckArgumentNotNull(generator, "generator");
ExceptionUtilities.CheckArgumentNotNull(instance, "instance");
ExceptionUtilities.CheckArgumentNotNull(callback, "callback");
var queryEntityType = instance.Type as QueryEntityType;
ExceptionUtilities.CheckObjectNotNull(queryEntityType, "Entity's type was not a query entity type. Type was: {0}", instance.Type);
return(callback(queryEntityType.EntitySet, queryEntityType.EntityType, instance.GetKeyPropertyValues()));
}
/// <summary>
/// Generates the conventional edit link for the given named stream: http://serviceRoot/SetName(keyValues)/StreamName
/// </summary>
/// <param name="generator">The generator to extend</param>
/// <param name="instance">The entity instance</param>
/// <param name="streamName">The stream's name</param>
/// <returns>The convention-based stream edit link</returns>
public static string GenerateNamedStreamEditLink(this IODataConventionBasedLinkGenerator generator, QueryStructuralValue instance, string streamName)
{
return(generator.EnsureIsEntityAndCall(instance, (entitySet, entityType, keys) => generator.GenerateNamedStreamEditLink(entitySet, entityType, keys, streamName)));
}
/// <summary>
/// Generates the conventional stream edit link for the given entity: http://serviceRoot/SetName(keyValues)/$value
/// </summary>
/// <param name="generator">The generator to extend</param>
/// <param name="instance">The entity instance</param>
/// <returns>The convention-based stream edit link</returns>
public static string GenerateDefaultStreamEditLink(this IODataConventionBasedLinkGenerator generator, QueryStructuralValue instance)
{
return(generator.EnsureIsEntityAndCall(instance, generator.GenerateDefaultStreamEditLink));
}
