Easy access to Documents that are about to be deleted in BeforeDeleteEvent [DATAMONGO-2469]

hoemich opened DATAMONGO-2469 and commented

While, with the BeforeSaveEvent it is very easy to get access to the Document that is about to be saved, in the BeforeSaveEvent it seems to be cryptic, and I failed to find any documentation on it.

To find out, what is about to be deleted, the only way I found was using

@EventListener
public void beforeDelete(BeforeDeleteEvent<MyDocument> event) {
     List<ObjectId> event.getDocument()
                         .get("_id", Document.class)
                         .getList("$in", ObjectId.class);
     // ... then use Ids to retrive the Document if necessary.
}

It would be great, to simplify this process, to get rid of cryptic identifiers, or if there is already another way, to provide documentation on it.

See also this question on SO: https://stackoverflow.com/questions/57149600/get-deleted-object-in-abstractmongoeventlistener/60153276#60153276

Affects: 2.2.4 (Moore SR4)