Hibernate Meta Model Models_.modelName ==null

[a7724172]

i use hibernate-jpamodelgen-1.2.0.Final.jar tool in javaee6 Environment  to produce Meta Model class.

but  when i test

   */

    public static void main(String[] args) {

     System.out.println(Models_.modelName);

    } why i  get  null?

myrun Environment   is

hibernate-commons-annotations-4.0.2.Final.jar

hibernate-core-4.3.0.Beta3.jar

hibernate-entitymanager-4.3.0.Beta3.jar

hibernate-jpa-2.1-api-1.0.0.Draft-16.jar

can any help me ? thanks very much

@Entity

@Table(name = "et_models")

@XmlRootElement

@NamedQueries({

    @NamedQuery(name = "Models.findAll", query = "SELECT m FROM Models m"),

    @NamedQuery(name = "Models.findByModelName", query = "SELECT m FROM Models m WHERE m.modelName = :modelName"),

    @NamedQuery(name = "Models.findByModelDesc", query = "SELECT m FROM Models m WHERE m.modelDesc = :modelDesc"),

    @NamedQuery(name = "Models.findByServerCodeBase", query = "SELECT m FROM Models m WHERE m.serverCodeBase = :serverCodeBase"),

    @NamedQuery(name = "Models.findByClientCodeBase", query = "SELECT m FROM Models m WHERE m.clientCodeBase = :clientCodeBase"),

    @NamedQuery(name = "Models.findByLoaderCodeBase", query = "SELECT m FROM Models m WHERE m.loaderCodeBase = :loaderCodeBase"),

    @NamedQuery(name = "Models.findByImporterCodeBase", query = "SELECT m FROM Models m WHERE m.importerCodeBase = :importerCodeBase"),

    @NamedQuery(name = "Models.findByCacheCodeBase", query = "SELECT m FROM Models m WHERE m.cacheCodeBase = :cacheCodeBase"),

    @NamedQuery(name = "Models.findByCreatedBy", query = "SELECT m FROM Models m WHERE m.createdBy = :createdBy"),

    @NamedQuery(name = "Models.findByCreationDate", query = "SELECT m FROM Models m WHERE m.creationDate = :creationDate"),

    @NamedQuery(name = "Models.findByLastUpdatedBy", query = "SELECT m FROM Models m WHERE m.lastUpdatedBy = :lastUpdatedBy"),

    @NamedQuery(name = "Models.findByLastUpdateDate", query = "SELECT m FROM Models m WHERE m.lastUpdateDate = :lastUpdateDate"),

    @NamedQuery(name = "Models.findByLastUpdateLogin", query = "SELECT m FROM Models m WHERE m.lastUpdateLogin = :lastUpdateLogin")})

public class Models implements Serializable {

    private static final long serialVersionUID = 1L;

    @Id

    @Basic(optional = false)

    @Column(name = "model_name")

    private String modelName;

    @Basic(optional = false)

    @Column(name = "model_desc")

    private String modelDesc;

    @Column(name = "server_code_base")

    private String serverCodeBase;

    @Column(name = "client_code_base")

    private String clientCodeBase;

    @Column(name = "loader_code_base")

    private String loaderCodeBase;

    @Column(name = "importer_code_base")

    private String importerCodeBase;

    @Column(name = "cache_code_base")

    private String cacheCodeBase;

    @Basic(optional = false)

    @Column(name = "created_by")

    private long createdBy;

    @Basic(optional = false)

    @Column(name = "creation_date")

    @Temporal(TemporalType.TIMESTAMP)

    private Date creationDate;

    @Basic(optional = false)

    @Column(name = "last_updated_by")

    private long lastUpdatedBy;

    @Basic(optional = false)

    @Column(name = "last_update_date")

    @Temporal(TemporalType.TIMESTAMP)

    private Date lastUpdateDate;

    @Basic(optional = false)

    @Column(name = "last_update_login")

    private long lastUpdateLogin;

    @OneToMany(mappedBy = "modelName")

  // @XmlElement(name="codingSchemesList")

    private List<CodingSchemes> codingSchemesList;

    public Models() {

    }

    public Models(String modelName) {

        this.modelName = modelName;

    }

    public Models(String modelName, String modelDesc, long createdBy, Date creationDate, long lastUpdatedBy, Date lastUpdateDate, long lastUpdateLogin) {

        this.modelName = modelName;

        this.modelDesc = modelDesc;

        this.createdBy = createdBy;

        this.creationDate = creationDate;

        this.lastUpdatedBy = lastUpdatedBy;

        this.lastUpdateDate = lastUpdateDate;

        this.lastUpdateLogin = lastUpdateLogin;

    }

.............................................

@Generated(value = "org.hibernate.jpamodelgen.JPAMetaModelEntityProcessor")

@StaticMetamodel(Models.class)

public abstract class Models_ {

          public static volatile SingularAttribute<Models, Date> creationDate;

          public static volatile ListAttribute<Models, CodingSchemes> codingSchemesList;

          public static volatile SingularAttribute<Models, String> modelName;

          public static volatile SingularAttribute<Models, Long> createdBy;

          public static volatile SingularAttribute<Models, String> importerCodeBase;

          public static volatile SingularAttribute<Models, Long> lastUpdateLogin;

          public static volatile SingularAttribute<Models, Long> lastUpdatedBy;

          public static volatile SingularAttribute<Models, String> modelDesc;

          public static volatile SingularAttribute<Models, String> loaderCodeBase;

          public static volatile SingularAttribute<Models, String> cacheCodeBase;

          public static volatile SingularAttribute<Models, String> serverCodeBase;

          public static volatile SingularAttribute<Models, String> clientCodeBase;

          public static volatile SingularAttribute<Models, Date> lastUpdateDate;

}