ObjectDB ObjectDB

Internal Website Search

61-70 of 172 resultsRefresh

Selective merge/cascade of detatched entity

I'm having an issue with my application, and I'm hoping you guys will be able to help. Please forgive typos and obvious errors, I'm having to retype from a non-internet connected network. A contrived example is: @Entity public class Salesman { private String name; @OneToMany(fetch

ClassCastException of same object type

is to eventually have the application used over a network via the server. So having

Removing objects where ManyToMany relationships exist

a TreeSet automatically removed as well, so, the TreeSet is reduced in size? Or do I end up having

mapping file is not being loaded

Hi, I am evaluating ObjectDB by using it with an in-house developed library in order to prototype its capabilities / performance. I am having a problem in that the in-house library in question reads a simple configuration file to determine available persistence units, and then bootstraps them using

_PersistenceException: Type is not found on getSingleResult.

Greetings. I'm new to ObjectDB. I'm using an ObjectDB local database for a Java SE standalone application and i'm having issues querying for an object of this entity: @Entity public class Estudiante{     @Id     @GeneratedValue     private Integer id;         @Column     private String

Problem with Criteria Querys

Hi, i am having problems running following code... import java.util.*; import javax.persistence.*; import javax.persistence.criteria.CriteriaBuilder; import javax.persistence.criteria.CriteriaQuery; import javax.persistence.criteria.ParameterExpression; import javax.persistence.criteria.Root

NontransactionalWrite error using Collections.sort .

Hi, i started to use ObjectDB today and i'm having problem using command Collections.sort in persisted object. Attempt to modify an object with no active transaction when NontransactionalWrite is disabled: br.ufpa.linc.MetriX.api.model.Interface#105 (error 635) I don't want to modifi de object in

Duplicate Entity class names causes Exception in Query

it works without having to use qualified entity names. Sorry, I didn't see that you only want

Query fails with failed to read

access mode instead of doing nothing, especially after having a c/s connection the usage before ... nothing, especially after having a c/s connection the usage before. There is a change in one of the recent

Best practice for history tracking

We would like to add to records start and end timestamp fields. When end field is null, it indicates the last version of this item. Few questions: in terms of performance, what would be faster, having a single timestamp and looking for the top1 when ordered by time or the above solution, looking

Getting Started

ObjectDB is very easy to use. Follow the Getting Started Tutorial and the Quick Tour manual chapter and in minutes you may be able to write and run first Java programs against ObjectDB.

Prior knowledge or experience in database programming (SQL, JDBC, ORM, JPA, etc.) is not required, but some background in using the Java language is essential.

Need Help?

  1. Search ObjectDB website
  2. Read the FAQ
  3. Follow the Tutorials
  4. View or post in the forum
  5. Search or file an issue
  6. Contact support