ngrx实体（数据）多个实体删除休息后端包含的错误类型

Question

我目前正在努力删除多个实体，并在NGRX中保存多个实体模式。这是当前的问题：

我的UI EntityCacheservice：

@Injectable({ providedIn: 'root' })
export class PlayerService extends EntityCollectionServiceBase<Player> {

  changes: ChangeSetItem[] = [];

  constructor(serviceElementsFactory: EntityCollectionServiceElementsFactory,
              private entityCacheDispatcher: EntityCacheDispatcher) {
    super('Player', serviceElementsFactory);
  }

  public createPlayerToBatch(players: Player) {
    let cs = new ChangeSetItemFactory().add("Player", players);
    this.changes.push(cs);
  }

  public updatePlayerToBatch(players: Player) {
    let cs = new ChangeSetItemFactory().update<Player>("Player", {id: players.id, changes: players});
    this.changes.push(cs);
  }

  // TODO: wrong type in backend here ...
  public deletePlayerToBatch(players: Player) {
    let cs = new ChangeSetItemFactory().delete("Player", players.id.toString());
    this.changes.push(cs);
  }

  public resetChanges() {
    this.changes = [];
  }

  public saveChangesToDatabase() {
    console.log("ChangeSetItems: ", this.changes);

    if(this.changes.length == 0) {
      // no changes
    }

    // https://blog.angular-university.io/ngrx-entity/
    this.entityCacheDispatcher.saveEntities(this.changes, environment.baseURL + 'player/crud/dispatcher')
        .pipe(
            map(response => response)
        );
  }

我的休息端点看起来像：

@POST
    @Path("player/crud/dispatcher")
    public Response multipleCrudDispatcher(ChangeSet<Player> cs) {

        ChangeItem<Player>[] items;
        items = cs.getChanges();

        Arrays.stream(items).forEach(changeItem -> {

            // Get alle affected entities from change item
            switch (changeItem.getOp()) {
                case Add:
                    System.out.println("ADD");
                    // Make the update database logic
                    handelAdd(changeItem.getEntities());
                    break;
                case Delete:
                    System.out.println("DELETE" );
                    // Make the update database logic
                    //handelDelete((String[]) changeItem.getEntities());
                    break;
                case Update:
                    System.out.println("UPDATE");
                    // Make the update database logic
                    handelUpdates(changeItem.getEntities());
                    break;
                case Upsert:
                    System.out.println("UPSERT");

                    break;
                default:

            }
        });

        return Response.ok(cs).build();
    }

端点期望在后端中更改类型“ player”，这是来自前端的相同结构。这也适用于Create，upSert，都很好地更新，因为它们还包含播放器对象列表。但是使用删除它不起作用:-(。删除期望带有字符串或数字的ID列表...这会导致后端错误，因为Java试图创建一个播放器对象。有人知道我如何可以解决这个难看的问题吗？