internal static ILookup <string, Microsoft.Exchange.MessagingPolicies.Rules.Rule> GetDataClassificationsInUse(IConfigDataProvider tenantSession, IEnumerable <string> dataClassificationIds, IEqualityComparer <string> dataClassificationIdComparer = null)
{
ArgumentValidator.ThrowIfNull("tenantSession", tenantSession);
ArgumentValidator.ThrowIfNull("dataClassificationIds", dataClassificationIds);
if (!dataClassificationIds.Any <string>())
{
return(Enumerable.Empty <Microsoft.Exchange.MessagingPolicies.Rules.Rule>().ToLookup((Microsoft.Exchange.MessagingPolicies.Rules.Rule rule) => null));
}
ADRuleStorageManager adruleStorageManager = new ADRuleStorageManager(Utils.RuleCollectionNameFromRole(), tenantSession);
adruleStorageManager.LoadRuleCollection();
return(DlpUtils.GetDataClassificationsReferencedByRuleCollection(adruleStorageManager.GetRuleCollection(), dataClassificationIds, dataClassificationIdComparer));
}
