Class « Entity « JPA Q&A





1. Do you have a common base class for Hibernate entities?    stackoverflow.com

Do you have a common base class for Hibernate entities, i.e. a MappedSuperclass with id, version and other common properties? Are there any drawbacks? Example:

@MappedSuperclass()
public class BaseEntity {

    private ...

2. What is the best practice for JPA/Hibernate entity classes and synchronization?    stackoverflow.com

It seems like most examples of JPA/Hibernate entity bean classes I've seen do no explicit synchronization. Yet, it is possible to call getters/setters on those objects in the context of ...

3. A tool for converting database tables to entity java classes for hibernate    stackoverflow.com

I need a tool for converting database tables to entity java files for hibernate. There are 20 tables (mysql) and I don't want to copy table's column name to my Java file ...

4. Netbeans creating "JPA Controller classes from entity classes"    stackoverflow.com

I want to achieve basic CRUD operations available of the db schema I already have for a JAVA program. To put it in another way, I have a DB schema I ...

5. Can I write to different jetty databases using JPA that is using the same "entity class"    stackoverflow.com

I am using Java persistance and there EntityManager class and have it assigned to storage a class object that shall be written to the database. My problem is that I want ...

6. Why can't entity class in JPA be final?    stackoverflow.com

Why can't an entity class in JPA be final or have a final methods? Citing from here -

An entity class must follow these requirements: ...

7. How to use Dbmapper to generate JPA entity classes from DB script?    stackoverflow.com

I am tring to use http://code.google.com/p/dbmapper/ and I am not sure how to run it frmo the command prompt. The sample usesege is like below

Usage: com.moonspider.dbmap.GenerateConfig
  -type (-t) [String] ...

8. JPA- mixing entity and non-entity classes    stackoverflow.com

the subject may be misleading. essentially, i have 3 "entities" with relationships between them. only one of the entities needs to be persistent (between server restarts). i still want DB functionality ...

9. How do you split a jpa application with references to common entity classes    stackoverflow.com

We have 2 modules which we would like to run as 2 different war applications. (e.g. app-common.jar containing common classes like User ... app-module1.jar provides module1 functionality and has a dependency on app-common.jar app-module2.jar ...





10. JPA Entity Class generation from SQL file    stackoverflow.com

In my POC for a project i did generated the JPA entity classes from the SQl Schema using (eclipse/Netbeans IDE tools). But when i have to move to the build system ...

11. How can I obtain the JPA entity class from src of a project?    forums.netbeans.org

How can I obtain the JPA entity class from src of a project? I want to do a small wizard ,which will help me to build Spring's service class.In the wizard ...

12. JPA Entity Classes from Database - Unique Index PK    forums.netbeans.org

Hello, I've been experimenting with the Entity Classes from Database feature in NetBeans 6.9.1 by pointing it at a large ERP vendor database. Very nice! I love the "include related tables" feature... I have not see this in any other IDE yet. The specific issue/question I have is about the generation of PK classes used as an EmbeddedId. I am seeing ...

13. Netbeans led me down primrose path - JPA Controller Classes from Entity Classes    forums.netbeans.org

Using Netbeans 6.8. I have admit, I am green with Hibernate, Persistence APIs and Spring. A lot of the online examples weave their way through frameworks without stopping a separating the frameworks, where one ends and the other begins. So I have my Entity classes with annotations created. Nothing special. I they noticed Netbeans has a UI for creating JPA Controller ...

14. Create JPA Controllers from entity classes? netbeans 7    forums.netbeans.org

Hi, I am trying to generate Jpa Controller classes from entity classes in netbeans 7, I go through the process and once I have selected the various entities I click next and I get a small information window stating Zip File Closed and it then will not continue to generate the controllers. Any advise on this issue would be appreciated. ta ...

15. I can't use Entity Class (JPA) in Netbeans7.0 .    forums.netbeans.org

16. Unable to generate entity classes for Hibernate    forums.netbeans.org

Dear lijey You would have to restart the application server (Glassfish)...Or alternately you might right click the glassfish node in server panel and click update to install the hibernate plugin..and restart server.. Regards Shudh Datta Senior Software Engineer HCL Technologies Ltd. -----Original Message----- From: lije.baley [mailto:address-removed] Sent: Monday, November 17, 2008 7:12 PM To: address-removed Subject: [nbj2ee] Unable to generate entity ...





17. JPA/Hibernate: Rename entity, change all references, no class found error    coderanch.com

Hi all, not sure if you can help but I hope you try! :-) This is a very weird problem. I decided to rename one of my entity objects from ProductSearchCriteria to ProductFilterCriteria. In my local tomcat/eclipse environment everything works great, however when I put my code up on the prod server I get this weird exception: java.lang.ExceptionInInitializerError at arson.model.util.PersistenceHelper.getFactory(PersistenceHelper.java:23) at ...

18. org.hibernate.MappingException: entity class not found:    coderanch.com

Hi ! I have created JSP page. When I run the page I get the following exceptions. All files(.java and .hbm.xml) are available inside WEB-INF/classes. Could someone help to solve this issue, please? Thanks in advance 12:41:51,859 INFO [STDOUT] inside try 12:41:51,859 INFO [Configuration] configuring from resource: /hibernate.cfg.xml 12:41:51,859 INFO [Configuration] Configuration resource: /hibernate.cfg.xml 12:41:51,859 INFO [Configuration] Reading mappings from resource ...

19. JPA PU and Entity Class problems    coderanch.com

Hi, I have a Swing project used persistence unit connect to database,and I also have several Entity classes to persist with database tables,information was displayed in a Swing Jtable ,appliation works fine with current database and table. problems is that I want change database connection property in the persistance.xml file when i started application,can I change the persistence.xml file in my ...

20. constructors in jpa Entity Class    coderanch.com

21. make a entity class rows read-only in JPA    coderanch.com

Hi I m able to get values using JPA when i have only mapped one table Now when i have gone for mapping related tables i get the error Only one may be defined as writable, all others must be specified read-only. Mapping: org.eclipse.persistence.mappings.OneToOneMapping[userId1] I m using [EclipseLink-0] (Eclipse Persistence Services - 2.0.1.v20100213-r6600) In one of the child tables i have ...

22. Duplicate class/entity even with auto-import="false"    forum.hibernate.org

Hello, I am working with Hyperjaxb3 Hibernate plugin and getting ever : org.hibernate.DuplicateMappingException: Duplicate class/entity mapping myPackage.PurchaseOrderType at org.hibernate.cfg.Mappings.addClass(Mappings.java:141) at org.hibernate.cfg.HbmBinder.bindRoot(HbmBinder.java:167) at org.hibernate.cfg.Configuration.add(Configuration.java:716) at org.hibernate.cfg.AnnotationConfiguration.processArtifactsOfType(AnnotationConfiguration.java:531) at org.hibernate.cfg.AnnotationConfiguration.secondPassCompile(AnnotationConfiguration.java:291) at org.hibernate.cfg.Configuration.buildMappings(Configuration.java:1162) at org.hibernate.ejb.Ejb3Configuration.buildMappings(Ejb3Configuration.java:1226) at org.hibernate.ejb.EventListenerConfigurator.configure(EventListenerConfigurator.java:173) at org.hibernate.ejb.Ejb3Configuration.configure(Ejb3Configuration.java:854) at org.hibernate.ejb.Ejb3Configuration.configure(Ejb3Configuration.java:191) at org.hibernate.ejb.Ejb3Configuration.configure(Ejb3Configuration.java:253) at org.hibernate.ejb.HibernatePersistence.createEntityManagerFactory(HibernatePersistence.java:125) at javax.persistence.Persistence.createEntityManagerFactory(Persistence.java:52) Is it not so that actually "auto-import=false" in the hbm should prevent class-analysing ??? my hybernate cfg is: ...

23. Not able to save entity in Table per concrete class    forum.hibernate.org

I have three entities - Reservation , Disc , AudioDisc, VideoDisc (both extending Disc class). My Mapping Files are as follows : Reservation.hbm.xml Code: ...

24. org.hibernate.MappingException: entity class not found    forum.hibernate.org

Newbie Joined: Fri Oct 01, 2010 6:35 am Posts: 2 Hi! I'm getting started with Hibernate. I've coded a simple web application with struts, hibernate to Oracle DB. Hibernate complete the class mapping successfuly, but a MappingException appears because the entity class is not found. Here is the situation... Class hierarchy: [ src ] +----[ hibernate ] +--------- Epleado.java +--------- Empleado.hbm.xml ...

25. Hibernate - Entity join class    forum.hibernate.org

Hi All, I am using the joined subclass in hibernate mapping. The following are the sample mapping file I used. This mapping file Asset_Holding ...

26. Hibernate slows down algorithms in entity classes?    forum.hibernate.org

Hello, I have a project with just 3 Entity classes. The performance of my project is very important, because there are methods in some entity-classes which are called permanently with a rate of 300000 times per second. The performance of the persistence mechanism(Hibernate with h2-database) is not important. My problem: When I just create a SessionFactory, the performance of my programm ...

27. Unknown entity class: java.lang.Integer    forum.hibernate.org

Beginner Joined: Fri Jan 16, 2004 4:58 pm Posts: 37 I am trying to work on some simple mappings to try and begin once again to understand how hibernate works (I'm tired of writing a ton of SQL ). I have 3 beans that have related tables. Employee, User, and Issue. The issue table in the database has 2 foreign keys. ...

28. Entity classes having self reference    forum.hibernate.org

Mapping documents:

As seen from the above mapping , "parent" property of the "A.B.C." class is pointing to "A.B.C" (to self) . In this case , when HQL query is fired for one "A.B.C", whether hibernate tries to fetch all the "parent" objects until it gets null ...

29. "Unknown Entity Class" - How to set the PK?    forum.hibernate.org

Hi, I have a table "xpackage" and a table "xclass". "xclass" has a primary key (xclassname,xpackageid). I generated the DAOs from the mappingfiles. So far everything seems to be fine. I don't know how to set the primarykey of the xclass. I get a net.sf.hibernate.MappingException: Unknown entity class: model.genDAO.Xclass What does that mean? Is something wrong with my db-tables or is ...

30. Unknown entity class: java.util.LinkedList    forum.hibernate.org

Author Message moacir.cardoso Post subject: Unknown entity class: java.util.LinkedList Posted: Thu Aug 04, 2005 4:37 pm Newbie Joined: Thu Feb 03, 2005 3:51 pm Posts: 7 Need help with Hibernate? Read this first: http://www.hibernate.org/ForumMailingli ... AskForHelp Hibernate version: 2.1 Mapping documents: Filename Pessoa ===========

31. hibernate.MappingException: Unknown entity class Error    forum.hibernate.org

hi all User spToSave =new User(); spToSave.setUserGroup(userGroup); <--userGroup been passed is a set, the field in obj class is also a set. however i get the folowing error net.sf.hibernate.MappingException: Unknown entity class: java.lang.String user.hbm.xml excerpt is as follows:

32. org.hibernate.MappingException: entity class not found: File    forum.hibernate.org

org.hibernate.MappingException: entity class not found: FileToSave at org.hibernate.mapping.PersistentClass.getMappedClass(PersistentClass.java:98) at org.hibernate.tuple.PropertyFactory.getGetter(PropertyFactory.java:163) at org.hibernate.tuple.PropertyFactory.buildIdentifierProperty(PropertyFactory.java:43) at org.hibernate.tuple.EntityMetamodel.(EntityMetamodel.java:114) at org.hibernate.persister.entity.AbstractEntityPersister.(AbstractEntityPersister.java:410) at org.hibernate.persister.entity.SingleTableEntityPersister.(SingleTableEntityPersister.java:108) at org.hibernate.persister.PersisterFactory.createClassPersister(PersisterFactory.java:55) at org.hibernate.impl.SessionFactoryImpl.(SessionFactoryImpl.java:219) at org.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:1126) at org.hibernate.console.ConsoleConfiguration$2.execute(ConsoleConfiguration.java:209) at org.hibernate.console.execution.DefaultExecutionContext.execute(DefaultExecutionContext.java:35) at org.hibernate.console.ConsoleConfiguration.execute(ConsoleConfiguration.java:71) at org.hibernate.console.ConsoleConfiguration.initSessionFactory(ConsoleConfiguration.java:207) at org.hibernate.eclipse.console.workbench.ConsoleConfigurationWorkbenchAdapter.getChildren(ConsoleConfigurationWorkbenchAdapter.java:24) at org.hibernate.eclipse.console.workbench.BasicWorkbenchAdapter.fetchDeferredChildren(BasicWorkbenchAdapter.java:68) at org.eclipse.ui.progress.DeferredTreeContentManager$1.run(DeferredTreeContentManager.java:192) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:76) Caused by: java.lang.ClassNotFoundException: FileToSave at org.eclipse.osgi.framework.internal.core.BundleLoader.findClass(BundleLoader.java:405) at org.eclipse.osgi.framework.internal.core.BundleLoader.findClass(BundleLoader.java:350) at org.eclipse.osgi.framework.adaptor.core.AbstractClassLoader.loadClass(AbstractClassLoader.java:78) at java.lang.ClassLoader.loadClass(Unknown Source) at java.lang.ClassLoader.loadClassInternal(Unknown Source) at java.lang.Class.forName0(Native Method) at java.lang.Class.forName(Unknown ...

33. How to create a entity class in this case    forum.hibernate.org

35. entity class not found problem    forum.hibernate.org

Eclipse and hibernate versions: the latests. When i try to execute my project, while creating a new session factory, my project trows a entity class not found exception. Let's see: entity class not found: Usuarios Exception in thread "AWT-EventQueue-0" java.lang.ExceptionInInitializerError at utilidades.UtilidadHibernate.(UtilidadHibernate.java:19) at accesoADatos.AccesoADatos.(AccesoADatos.java:17) at negocio.Negocio.(Negocio.java:12) at negocio.Negocio.(Negocio.java:19) at presentacion.Login$1.actionPerformed(Login.java:75) at javax.swing.AbstractButton.fireActionPerformed(Unknown Source) at javax.swing.AbstractButton$Handler.actionPerformed(Unknown Source) at javax.swing.DefaultButtonModel.fireActionPerformed(Unknown Source) at javax.swing.DefaultButtonModel.setPressed(Unknown ...

36. Ternary table as entity class    forum.hibernate.org

37. entity class not found: Configuration.addJar() problem    forum.hibernate.org

I think that addJar method only reads in the .hbm.xml files to the Configuration class from that Jar file. I'm pretty sure you still need to add the jar to your program's classpath if the related .class files are in there. And, make sure your program can access that C:/test directory to read them.

38. entity class not found    forum.hibernate.org

hi, i'm trying to use hibernate for a web application. i used hibernate tools and eclipse for reverse engineering all the code from an existing mysql 5 database. the exporters i used are - dao code - hibernate xml mappings - domain code all the generated files are stored in the same directory. when i want to run a small test ...

39. How to access session object in entity class    forum.hibernate.org

40. CustomPersister class (Entity Persister)    forum.hibernate.org

Hibernate version: 3.2GA Name and version of the database you are using: Custom Persistence Folks, I am writing my own "persister" and I would like to know if I do have to implement a separate class that will fetch the object. I having been playing around with the customPersister from the hibernate example (test dir)example. However, when I try to retrieve ...

41. CustomPersister class (Entity Persister)    forum.hibernate.org

Hibernate version: 3.2GA Name and version of the database you are using: Custom Persistence Folks, I am writing my own "persister" and I would like to know if I do have to implement a separate class that will fetch the object. I having been playing around with the customPersister from the hibernate example (test dir)example. However, when I try to retrieve ...

42. Non persistent class as an aggregate of persistent entities    forum.hibernate.org

Hi all, I'm trying to make a class which acts like an aggregate of persistent entities. However, I do not want this class persisted. As an example, I'd like to have a nonpersistent class House that is made up of persistent classes Windows, Doors, and Walls. I'd like to be able to call HouseDAO.save(house) and have it save all my doors, ...

43. createFullTextQuery with multiple entity Class    forum.hibernate.org

44. The .getClass() return Class wrong, return _$$    forum.hibernate.org

Newbie Joined: Tue Jul 12, 2005 2:46 pm Posts: 12 Location: BS2 If you observe the output of execution of the TestCX class, you see an error to second user (Clayton) in return of method getClass(). See class com.ws.model.entities.Mensagem_$$_javassist_0, it's not corret, the correct output is: class com.ws.model.entities.Mensagem In Attachement contain an .rar file with my miniproject to demonstrate a error. ...

45. Using package-private classes as JPA Entities    forum.hibernate.org

Hi, We try to enforce proper encapsulation in our domain-model, by creating public interfaces for business-entities, and package-private classes that implement those interfaces, and contain JPA (or Hibernate) annotations. However, this is impossible to do, once you need to map an association, in which the mapped property references the interface, and the targetEntity attribute is required to tell Hibernate the concrete ...

46. Return Multiple entities with different classes    forum.hibernate.org

From the following document, i could get how to get Hibernate return Multiple entities. In this example, it's always 2 returning entity but the final result is only one class called "Night.class" http://docs.jboss.org/hibernate/stable/ ... ery-native I have a scenario, where for view only purposes, i need to return Multiple Non-Connected entities (different classes) using same Named Query. I tried following option. ...

47. Error reading resource: and entity class not found:    forum.hibernate.org

Hi friends, I have a Example1.hbm.xml which is working fine. Example1.hbm.xml I have the following entry in hibernate.cfg.xml Now I added newly the following and copied the above Example1.hbm.xml as Example2.hbm.xml ...