public override IValue interpret(Context context)
{
List <object> toDelete = null;
if (deletables != null)
{
toDelete = new List <object>();
deletables.ForEach((exp) => CollectDeletables(context, exp, toDelete));
}
List <IStorable> toStore = null;
if (storables != null)
{
toStore = new List <IStorable>();
storables.ForEach((exp) => CollectStorables(context, exp, toStore));
}
if (deletables != null || storables != null)
{
IAuditMetadata withMeta = null;
if (metadata != null)
{
IValue value = metadata.interpret(context);
if (value is DocumentValue)
{
DocumentValue doc = (DocumentValue)value;
withMeta = DataStore.Instance.NewAuditMetadata();
foreach (String name in doc.GetMemberNames())
{
value = doc.GetMemberValue(context, name, false);
withMeta[name] = value.GetStorableData();
}
}
}
DataStore.Instance.DeleteAndStore(toDelete, toStore, withMeta);
}
if (andThen != null)
{
andThen.interpret(context);
}
return(null);
}
