Annotation « Data Type « JPA Q&A

1. How is a blob column annotated in Hibernate? stackoverflow.com

How is a blob column annotated in Hibernate? So far I have a class that has:

@Column( name = "FILEIMAGE" )
private byte[ ] fileimage ;
//
public byte[ ] getFileimage ( ) { return this.fileimage ...

2. Text Field using Hibernate Annotation stackoverflow.com

I am having trouble setting the type of a String, it goes like

public void setTextDesc(String textDesc) {
 this.textDesc = textDesc;
}

@Column(name="DESC")
@Lob
public String getTextDesc() {
 return textDesc;
}

and it didn't work, I checked the ...

3. hard time setting autogenerated time with hibernate JPA annotations stackoverflow.com

thanks to you guys my knowlegde on hibernate has been improve dratiscally. now i hit a block here about current_timestamp. here is my codes

@Column(name="DATE_CREATED", insertable=false, updatable=false, columnDefinition="timestamp default current_timestamp")
@org.hibernate.annotations.Generated(value=GenerationTime.INSERT)
@Temporal(javax.persistence.TemporalType.TIMESTAMP)
private Date dateCreated;

@Column(name="LAST_MODIFIED", insertable=false, ...

4. Why does JPA have a @Transient annotation? stackoverflow.com

Java has the transientkeyword. Why does JPA have @Transient instead of simply using the already existing java keyword?

5. Hibernate with Annotations and MySQL: Creation Date stackoverflow.com

I try to save the date of creation of my entity. I have found that approach. I tried to implement it but the date doesn't reach my db-table.

import java.io.Serializable;
import java.util.Date;

import ...

6. What's the JDO equivalent of the JPA @PersistenceContext annotation stackoverflow.com

In JPA, you can inject an EntityManager with the @PersistenceContext annotation:

@PersistenceContext
private EntityManager entityManager;

What is the JDO equivalent of this for a PersistenceManager?

@????
private PersistenceManager persistenceManager;

7. Is it possible to do type conversion (from boolean to yes_no) in pure JPA? stackoverflow.com

There is an annotation in Hibernate that can persist boolean types as 'Y'/'N' in the database. http://stackoverflow.com/questions/1154833/configure-hibernate-using-jpa-to-store-y-n-for-type-boole an-instead-of-0-1 However if I don't want to bind to Hibernate is there a way to ...

8. Is there a "collection-type" equivalent annotation in Hibernate? stackoverflow.com

In Hibernate you can define a custom collection type by setting the "collection-type" attribute in hibernate xml mapping file. I was wondering if there is an annotation equivalent. PS: I tried using @Type ...

9. assign timestamp in jpa annotation stackoverflow.com

is there a way to automatically assing a timestamp value in a Date variable on a enity EJB? here is how my enity looks like.

package com.jr.entities;

import java.util.Date;

import javax.persistence.Column;

public class TransactionDAO {

  ...

10. Is there an equivalent annotation for OnDelete in JPA2 stackoverflow.com

import org.hibernate.annotations.OnDelete;

@OnDelete(action = org.hibernate.annotations.OnDeleteAction.CASCADE)
List<Foo> foos;

Is there an equivalent JPA2 annotation for the Hibernate annotation OnDelete?

11. Problem with JPA Annotation @Transient stackoverflow.com

I'm trying to mapping a data base from "Drupal" with Hibernate and JPA to make a Java layer for work with the data. In a class, I need to add an attribute, ...

12. Hibernate - How to set sql-type by annotation? stackoverflow.com

I have a file as a byte[] fileContent. My mySql-scheme is generated by Hibernate and by default hibernate sets the sql-type of fileContent to BLOB. But a BLOB is not big enough ...

13. JPA, transient annotation not overwriting OneToOne? stackoverflow.com

I have a superclass Product and a subclass Reduction. Now I want the subclass to override a property of the superclass so it isn't persisted in the database. I excpeted it ...

14. Annotation @Basic to transient variables stackoverflow.com

I am having a POJO class which consists of:
- persistent properties,
- transient properties. While writing HQL I considered both: persistent and transient properties. I.e. HQL like select persistent_properties,transient_prop from Pojo_classname is it correct? Can I ...

15. [Hibernate3] MappingException with @Transient annotation coderanch.com

16. Enums and AttributeOverrides annotation forum.hibernate.org

Hi all, Is there any way to store String presentation of Enum to db when using the AttributeOverrides annotation. The idea what i would like to do as code: Code: @Embeddable public class FooEnum { public enum MyEnum { VALUE1, VALUE2 }; private Date start; private Date end; private MyEnum myEnum; ...

17. String variable with Range annotation forum.hibernate.org

Hi I have a String variable It is nullable=true in the database. I have defined it as follows : @Column(name = "MINI_NO", length = 1) @Range(min = 1, max = 6, message = "miniNo out of Range") public String getMiniNo() { return this.miniNo; } public void setMiniNo(String miniNo) { this.miniNo = miniNo; } The thing is when I am updating this ...

18. Hibernate annotations and automatic Timestamp forum.hibernate.org

With insertable = false in your column annotation you removed the column from any insert statement. I only use this annotation, when I want to provide a second field for the identifier of a reference. So both fields references the same column like @Column(insertable=false, updateable=false ...) private Long roleId; @ManyToMany(...) private Role role; Kind regards Michael

19. annotation needed to handle Set emailAddresses forum.hibernate.org

20. Problem with JPA Annotation @Transient forum.hibernate.org

I'm trying to mapping a data base from "Drupal" with Hibernate and JPA to make a Java layer for work with the data. In a class, I need to add an attribute, called "rank" to use it later, but that attribute doesn't exist in the database, so I put @Transient annotation... I use the set method to put a value on ...

21. Way to specify column data type using EJB 3.0 annotations? forum.hibernate.org

Hibernate version: hibernate-3.0beta1 with hibernate-annotations-3.0alpha1 I found that I was able to specify the data type for a column using the following EJB 3.0 annotation. @Column(columnDefinition="TEXT") This works great. However, I'm wondering if there is a way to specify the type in a DBMS-independent fashion. For example, if I use the annotation above, it will work with MySQL and with Microsoft ...

22. Hibernate 3.0.5 + annotations + java 5.0 Enums problem forum.hibernate.org

Hibernate version: 3.0.5 Full stack trace of any exception that occurs: org.hibernate.exception.GenericJDBCException: could not insert: [com.mgjug.model.persistence.usuario.Usuario] at org.hibernate.exception.ErrorCodeConverter.handledNonSpecificException(ErrorCodeConverter.java:92) at org.hibernate.exception.ErrorCodeConverter.convert(ErrorCodeConverter.java:80) at org.hibernate.exception.JDBCExceptionHelper.convert(JDBCExceptionHelper.java:43) at org.hibernate.persister.entity.BasicEntityPersister.insert(BasicEntityPersister.java:1777) at org.hibernate.persister.entity.BasicEntityPersister.insert(BasicEntityPersister.java:2178) at org.hibernate.action.EntityIdentityInsertAction.execute(EntityIdentityInsertAction.java:34) at org.hibernate.engine.ActionQueue.execute(ActionQueue.java:239) at org.hibernate.event.def.AbstractSaveEventListener.performSaveOrReplicate(AbstractSaveEventListener.java:240) at org.hibernate.event.def.AbstractSaveEventListener.performSave(AbstractSaveEventListener.java:160) at org.hibernate.event.def.AbstractSaveEventListener.saveWithGeneratedId(AbstractSaveEventListener.java:95) at org.hibernate.event.def.DefaultSaveOrUpdateEventListener.saveWithGeneratedOrRequestedId(DefaultSaveOrUpdateEventListener.java:184) at org.hibernate.event.def.DefaultSaveOrUpdateEventListener.entityIsTransient(DefaultSaveOrUpdateEventListener.java:173) at org.hibernate.event.def.DefaultSaveOrUpdateEventListener.performSaveOrUpdate(DefaultSaveOrUpdateEventListener.java:96) at org.hibernate.event.def.DefaultSaveOrUpdateEventListener.onSaveOrUpdate(DefaultSaveOrUpdateEventListener.java:69) at org.hibernate.impl.SessionImpl.saveOrUpdate(SessionImpl.java:468) at org.hibernate.impl.SessionImpl.saveOrUpdate(SessionImpl.java:463) at com.mgjug.eai.HibernateGenericDAO.insert(HibernateGenericDAO.java:27) at com.mgjug.services.impl.CadastroServiceImpl.cadastrar(CadastroServiceImpl.java:18) at com.mgjug.services.test.CadastroServiceTest.testCadastrar(CadastroServiceTest.java:34) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) at ...

23. property-ref equivalent with annotations forum.hibernate.org

Hi guys, I'm a little new to Hibernate, so thought I would try testing my knowledge by moving some of the hibernate mappings from hb.xml files to java annotations. I am stuck on one issue, where I want to create a many-to-one relationship from one class, Trade, to another Instrument. However, I don't want to reference the primary key, but a ...

24. How to config enum with annotation as the *EnumUserType do? forum.hibernate.org

Newbie Joined: Thu Nov 13, 2008 3:57 am Posts: 3 Need help with Hibernate? Read this first: http://www.hibernate.org/ForumMailingli ... AskForHelp It's easy to customize the persistence of enum by using *EnumUserType. But how to achieve the save effect with annotation? For example, I have a enum like this: Code: public enum OrderType { RecOrder, ...

25. Minimising annotations on UserType properties forum.hibernate.org

Hello, I have created several UserType classes for my domain model custom value types. I have defined them in a package-info.java file using @TypeDef annotations (wrapped inside @TypeDefs). Then in my domain model classes, I annotate each such property with @Type. It is also necessary to include @Column so that the schema generator shows the correct type length (e.g. 'CHAR(10)') in ...