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How to save map <String, List <String>> using JPA

I am trying to save Map<String, List<String>>

; using JPA.

My object looks like this:

@Entity
@Table(name = "Profiles_table")
public class Profiles {

    @Id
    @Column(name = "profile_ID", updatable = false, nullable = false)
    @GeneratedValue(strategy = GenerationType.AUTO)
    private int id;

    private final HashMap<String, List<String>> AllProfiles;
    ...
}

I tried many settings for the map but didn't work ...

Last thing I tried:

@ElementCollection
@MapKeyColumn(name = "Profil")
@Column(name = "Permissions")
@CollectionTable(name = "Profiles_permissions", joinColumns = @JoinColumn(name = "profile_ID"))

The following exception is thrown:

org.hibernate.AnnotationException: Illegal attempt to map a non collection as a
@OneToMany, @ManyToMany or @CollectionOfElements: [...]Profiles.AllProfiles

early

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3 answers


Not really an answer, but that's what I did.

I am storing the second level of the collection as a blob.



@Entity
@Table(name = "Profiles_table")
public class Profiles {

@Id
@Column(name = "profile_ID", updatable = false, nullable = false)
@GeneratedValue(strategy = GenerationType.AUTO)
private int                                 id;

@Column(length = 16777210)
private final HashMap<String, Set<String>>  AllProfiles;
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Strings are not objects, so you shouldn't use @OneToMany etc.

Have you tried this:



@CollectionOfElements
private Map<String, List<String>> allProfiles;
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Have you tried to declare AllProfiles as an interface type (let's say Map)? Check "Illegal Attempted Non-Collection Mapping as @OneToMany, @ManyToMany or @CollectionOfElements" in Hibernate while annotating ConcurrentHashMap

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