The annotated property should be of typeList,Set,Collection, orMap, and the elements of the collection must be entities.

For example:

 @ManyToAny @Column(name = "property_type") @AnyKeyJavaClass(Long.class) @AnyDiscriminatorValue(discriminator = "S", entity = StringProperty.class) @AnyDiscriminatorValue(discriminator = "I", entity = IntegerProperty.class) @JoinTable(name = "repository_properties",            joinColumns = @JoinColumn(name = "repository_id"),            inverseJoinColumns = @JoinColumn(name = "property_id")) @Cascade(PERSIST) private List<Property<?>> properties = new ArrayList<>();

In this example,Property is not required to be an entity type, it might even just be an interface, but its subtypesStringProperty andIntegerProperty must be entity classes with the same identifier type.

This is just the many-valued form ofAny, and the mapping options are similar, except that the@JoinTable annotation is used to specify the association table.

• AnyDiscriminator,JdbcType, orJdbcTypeCode specifies the type of the discriminator,
• AnyDiscriminatorValue specifies how discriminator values map to entity types.
• AnyKeyJavaType,AnyKeyJavaClass,AnyKeyJdbcType, orAnyKeyJdbcTypeCode specifies the type of the foreign key.
• JoinTable specifies the name of the association table and its foreign key columns.
• Column specifies the column of the association table in which the discriminator value is stored.