@Entity
public class Item implements Serializable
{
    private static final long serialVersionUID = 1L;

    @Id
    @Column(nullable = false)
    private String name;

    @ElementCollection(fetch = FetchType.EAGER)
    @CollectionTable(name = "STORED_INPUT_PARAMETER", joinColumns = @JoinColumn(name = "STORED_INPUT_ID"))
    @MapKeyColumn(name = "NAME")
    @Lob
    @Column(name = "VALUE", length = 65535)
    private Map<String, String> parameters = new HashMap<>();
    ...