About API

api-jdo

javax.jdo.spi.PersistenceCapable

A class that can be managed by a binary-compatible JDO implementation must implement this interface.(Interface of JDO)

 
forum_thread

Enhancer problem

During development, I have used the enhancer API in a static block in the code that creates the EntityManagerFactory, ie. ... During development, I have used the enhancer API in a static block in the code that creates the EntityManagerFactory, ie. ...

 
forum_thread

Issue with alias

Hi, This query works and correctly casts and selects my entity into the tuplet: SELECT $1, ((com.lexware.vereinsverwaltung.abrechnung.api.model.mitglied.MitgliedDebitorenKontoFragment)$1.qubletFRAGMENTMAP.get('com.lexware.vereinsverwaltung.abrechnung.api.model.mitglied.MitgliedDebitorenKontoFragment')) AS DEB FROM com.lexware.vereinsverwaltung.verein.mitglied.Mitglied $1 WHERE DEB.debitor=true however, trying to access "DEB" in the where clause causes an "unexpected token" error? Alex ... com . lexware . vereinsverwaltung . abrechnung . api . model . mitglied . MitgliedDebitorenKontoFragment ) $1 . ... . get ( 'com.lexware.vereinsverwaltung.abrechnung.api.model.mitglied.MitgliedDebitorenKontoFragment' ) ) AS ...

 
issue

ObjectDB for Android

ObjectDB has not been tested yet on Android and it is unknown yet what exactly is necessary to make ObjectDB run on Android. Using ObjectDB and Java Persistence API (JPA) on Android should have great potential.... Using ObjectDB and Java Persistence API (JPA) on Android should have great potential, but it has not been tried ...

 
manual

Chapter 3 - Using JPA

Explains how to store, retrieve, update and delete entity objects using JPA.... to manage ObjectDB databases using the Java Persistence API (JPA). The first two pages introduce basic JPA interfaces and ...

 
forum_thread

multiple LEFT JOINs do not work as expected

Hi, We have a hierarchical data set of organisations in the database, where each organisation stores a reference to it parent organisation. I'm trying to find all organisations 2 levels under a root organisation, e.g. where organisation.parentOrg is the root or organisation.parentOrg.parentOrg is the root. The query also contains a number of other predicates and it is built dynamically using Criteria API. It could be looking for other number of levels, 2 is just an example. The test query looks like this: ... predicates and it is built dynamically using Criteria API. It could be looking for other number of levels, 2 is just an example. ...

 
forum_thread

Recommendation - concurrent access multiple class v

Hi! I've just started to architect a new system, stateless JSON API, which is expected to have very high load and to require more servers for parallel deployments (same app across multiple servers). I am considering using ObjectDB, because of its advantages and easy usage, but I'm afraid that it might get corrupted because the manual says that we must not access ObjectDB with different versions of a class. Let's take the following scenario: ... just started to architect a new system, stateless JSON API, which is expected to have very high load and to require more servers for ...

 
api-jpa

javax.persistence.criteria.Predicate

The type of a simple or compound predicate: a conjunction or disjunction of restrictions.(Interface of JPA)

 
api-jpa

javax.persistence.criteria.Expression

Type for query expressions.(Interface of JPA)

 
forum_thread

Is ObjectDB the only object database that supports JPA?

Other Object database does'nt support JPA?   ... JPA is designed as an API for Object Relational Mapping (ORM), so many JPA features cannot be ...