eclipselink

问题 I have an entity: @Entity public class MyEntity { @Id @GeneratedValue(strategy = GenerationType.IDENTITY) @Column(name = Columns.ID) private Long id; // getter & setter } Then, I create an instance of the entity MyEntity my = new MyEntity(); and want to save it with DAO (using Spring Data for JPA) - dao.save(my); . I got the following exception: Caused by: Exception [EclipseLink-6023] (Eclipse Persistence Services - 2.4.0.v20120608-r11652): org.eclipse.persistence.exceptions.QueryException

问题 I have the following JPQL in ProductList Entity class which executes as expected. select DISTINCT new foo.bar.ProductListDTO(p.prodId, " + CASE WHEN (p.prodId = 'ZCX') THEN CONCAT(p.prodDesc, ' - ', e.userId) ELSE p.prodDesc END) from ProductList p LEFT JOIN p.productCatalogueList c where c.userId='ZAM' ProductListDTO class public ProductListDTO(String prodId, String prodDesc, String userId) { this.prodId = prodId; this.prodName = prodDesc; this.userId = userId; } What I would like to achieve

问题 I have a many-to-many relationship with an additional column between two entities. On the owner side entity I have set the cascade type to persist. @OneToMany(cascade=CascadeType.PERSIST, fetch = FetchType.LAZY, mappedBy = "definitionType") private List<DefinitionProperty> definitionProperties = new ArrayList<DefinitionProperty>(); Here is my new entity which represents table: @EmbeddedId protected DefinitionPropertyPK pk; @JoinColumn(name = "dtid", referencedColumnName = "id", insertable =

问题 I have been having concurrency problems with TABLE sequences on MySQL and found advise that the solution may be configuring a separate connection pool for sequence generation. In this stackoverflow question it points to the Eclipselink Documentation which has a section for an example that's empty. I can't seem to find any example of how this is configured. My persistence.xml at the moment is below. What should I change to ensure sequence generation is executed on a seperate transaction /

问题 UPDATE My friend did the same lines of code and his lines just worked. What could it be? I use NetBeans 7.0.1 and his is 6.9.1. My GlassFish is 3.1 and his is 3.0.1 END OF UPDATE @Inheritance(strategy= InheritanceType.JOINED) @Entity @Table(name = "vehicle") @DiscriminatorColumn(name = "type", discriminatorType = DiscriminatorType.INTEGER) @NamedQueries({ @NamedQuery(name = "Vehicle.findAll", query = "SELECT v FROM Vehicle v")}) public class Vehicle implements Serializable { private static

问题 JPA provider eclipselink 2.3 AS glassfish 3.1.1 B12 Binary protocol for remote invocation Hessian Server side ejb+jpa Client side Plain Swing . JPA mappings @Entity @Table(name = "FATHER", catalog = "CAT", schema = "dbo") public class Father implements Serializable { private static final long serialVersionUID = 1L; @Id @GeneratedValue(generator = "FATHERUID", strategy = GenerationType.TABLE) @TableGenerator(name = "FATHERUID", table = "FAMILY_UID", catalog = "LSDB", schema = "dbo",

问题 JPA provider eclipselink 2.3 AS glassfish 3.1.1 B12 Binary protocol for remote invocation Hessian Server side ejb+jpa Client side Plain Swing . JPA mappings @Entity @Table(name = "FATHER", catalog = "CAT", schema = "dbo") public class Father implements Serializable { private static final long serialVersionUID = 1L; @Id @GeneratedValue(generator = "FATHERUID", strategy = GenerationType.TABLE) @TableGenerator(name = "FATHERUID", table = "FAMILY_UID", catalog = "LSDB", schema = "dbo",

问题 My application extracts large amounts of geometry data. I use Eclipselink 2.4.1 to persist that data in a MySQL database. The application works batch-style, i.e. I gather a set of data, then persist it, and continue with the next set, persist it and so on. Another application later reads that data and processes it, but this question is only about the first application that gathers the data. The data-gathering application runs for quite some time. I use a fixed set of EntityManagers which are

问题 I am declaring a List object property with: @XmlRootElement(namespace = "...") @XmlType public class Test { private List<String> myList; @XmlElementWrapper(name = "myListWrapper") @XmlElement(name = "myList") public List<String> getMyList() { return myList; } } When an instance of this class with an empty list myList is marshalled, MOXy is not generating an empty wrapper MyListWrapper . However, JAXB RI would do it. The generated XML looks like this when using the RI: <ns2:test xmlns:ns2="...

问题 There are two tables in MySQL database user_table feedback The relationship between them is intuitive - one to many from user_table to feedback . I need to fetch only a list of selected columns from these tables which are From feedback feedbackId (java.lang.Long) feedbackTitle (java.lang.String) feedbackDescription (String, decorated by @Lob ) feedbackDate (org.joda.time.DateTime) testimonial (java.lang.Boolean) From user_table userId (java.lang.Long) firstName (java.lang.String) These many