java - Morphia-CodecConfigurationException : Can't find a codec for class - But class is registered

Question

我遇到了一个尚未遇到的问题。 我想使用 Morphia 在 MongoDB 中存储带有嵌入对象的对象。

它似乎完全理解如何解/序列化顶级类，但不理解嵌入式类。这是两个类:

@Entity(value = "cb-homes", noClassnameStored = true)
@Getter
@Setter
@ToString
public class DatastoreHome extends DatastoreEntity {

    @Id
    private ObjectId id;
    @Indexed(options = @IndexOptions(unique = true, sparse = true, background = true))
    private UUID uniqueId;
    @Property("homes")
    @Embedded
    private Map<String, List<HomeLocation>> homeLocations;

    public List<String> getHomeNameList() {
        List<HomeLocation> locations = homeLocations.get(Bukkit.getServerName());
        if(locations == null) {
            locations = new ArrayList<>();
            homeLocations.put(Bukkit.getServerName(), locations);
        }
        return locations.stream().map(HomeLocation::getHomeName).collect(Collectors.toList());
    }

    public List<Location> getHomeLocationList() {
        List<HomeLocation> locations = homeLocations.get(Bukkit.getServerName());
        if(locations == null) {
            locations = new ArrayList<>();
            homeLocations.put(Bukkit.getServerName(), locations);
        }
        return locations.stream().map(HomeLocation::getLocation).collect(Collectors.toList());
    }

    public boolean hasSetBaseHome() {
        return getHomeLocation("home") != null;
    }

    public Location getBaseHomeLocation() {
        return getHomeLocation("home");
    }

    public Location getHomeLocation(String homeName) {
        List<HomeLocation> locations = homeLocations.get(Bukkit.getServerName());
        if(locations == null) {
            locations = new ArrayList<>();
            homeLocations.put(Bukkit.getServerName(), locations);
        }
        return locations.stream()
                .filter(location -> location.getHomeName().equals(homeName.toLowerCase()))
                .findAny()
                .map(HomeLocation::getLocation)
                .filter(location -> location.getWorld().getName() != "world")
                .orElse(null);
    }

    public boolean isHomeAlreadySet(String name) {
        return getHomeNameList().contains(name.toLowerCase());
    }

    public HomeLocation addHomeLocation(String homeName, Location location) {
        List<HomeLocation> locations = homeLocations.get(Bukkit.getServerName());
        if(locations == null) {
            locations = new ArrayList<>();
            homeLocations.put(Bukkit.getServerName(), locations);
        }
        if(isHomeAlreadySet(homeName)) {
            locations.remove(getHomeLocation(homeName));
        }
        HomeLocation homeLocation = new HomeLocation();
        homeLocation.setHomeName(homeName.toLowerCase());
        homeLocation.setLocation(location);
        homeLocations.get(Bukkit.getServerName()).add(homeLocation);
        return homeLocation;
    }

    public void removeBaseHomeLocation() {
        removeHomeLocation("home");
        addHomeLocation("home", new Location(Bukkit.getWorld("world"), 0, 0, 0, 0, 0));
    }

    public boolean removeHomeLocation(String homeName) {
        if(homeLocations.get(Bukkit.getServerName()) == null) {
            homeLocations.put(Bukkit.getServerName(), new ArrayList<>());
        }
        return homeLocations.get(Bukkit.getServerName()).removeIf(location -> location.getHomeName().equals(homeName));
    }

    static {
        datastore.ensureIndexes(DatastoreHome.class);
    }
}

和

@Embedded
@Getter
@Setter
@ToString
public class HomeLocation extends DatastoreEntity {

    @Id
    private ObjectId id;

    private String homeName;
    @Property("location")
    private Document document;

    public Location getLocation() {
        return deserialize(document);
    }

    public void setLocation(Location location) {
        document = serialize(location);
    }

    private Document serialize(Location location) {
        return new Document("world", location.getWorld())
                .append("x", location.getX())
                .append("y", location.getY())
                .append("z", location.getZ())
                .append("yaw", location.getYaw())
                .append("pitch", location.getPitch());
    }

    private Location deserialize(Document document) {
        return new Location(Bukkit.getWorld((String) get("world")), (double) get("x"), (double) get("y"), (double) get("z"), (float) get("yaw"), (float) get("pitch"));
    }

    private Object get(String key) {
        return document.get(key);
    }

    static {
        datastore.ensureIndexes(HomeLocation.class);
    }

}

正如您所看到的，这两个类都通过静态类初始化添加到 Morphia 索引中。这适用于所有其他类，但仅适用于 HomeLocation.class，它不起作用。

你们有什么想法可以解决这个问题吗？ 我还尝试在初始化 Morphia 时手动将类添加到 Morphia 索引，但这也不起作用。

希望你能帮助我。

亲切的问候，

法比安·施密特

Answer 1

我知道这是一篇旧帖子，但分享我的解决方案希望对其他人有所帮助。

就您而言，您应该更改此设置:

@Property("homes")
@Embedded
private Map<String, List<HomeLocation>> homeLocations;

进入此:

@Embedded("homes")
private Map<String, List<HomeLocation>> homeLocations;

并且无需在 HomeLocation 类之上添加 @Embedded 注释。