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About Metadata API

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Manual
3

Retrieving JPA Entity Objects

The Java Persistence API (JPA) provides various ways to retrieve objects from the database. The retrieval of objects does not require an active transaction because it does not change the content of the database. The persistence context serves as a cache of retrieved entity objects. If a requested
Result
3

What is new in ObjectDB 2.0?

ObjectDB 2.0 supports many new features and improvements, including: Most of the features of the new JPA 2.0 and JDO 2.2 APIs. User defined IDs (primary key) and sequences. Support of unlimited index keys size. SQL like queries ("select from ... where ..."). Real non blocking multithreading in
Manual
3

ObjectDB Developer's Guide

Welcome to ObjectDB for Java/JPA Developer's Guide. Here you can learn how to develop database applications using ObjectDB and JPA (Java Persistence API). The main purpose of this guide is to make you productive with ObjectDB and JPA in a short time. Guide Structure This manual is divided into
Forum
3

JPQL JOIN FETCH Error

fetch doi.metadata metadata left join fetch metadata.titles titles left join fetch metadata.creators creators left join fetch metadata.descriptions descriptions left join fetch metadata.publishers publishers left join fetch metadata.contributors contributors left join fetch metadata.dates
Forum
3

JDO support vs JPA

Hi, I am about to update the JDO metadata in the package.jdo files after moving from ObjectDB 1 to 2. However I found that there is no complete description or guide how the XML metadata should look ... description of XML metadata for ObjectDB ver2 using JDO which I did not find? 2. Is the combined
Forum
3

disabling JDO in objectdb embedded mode

/lib/slf4j-api-1.6.4.jar, URLEntry : file:/usr/local/glassfish/glassfish/domains/dex/applications ... -1.0-SNAPSHOT/lib/javaee-api-6.0.jar, URLEntry : file:/usr/local/glassfish/glassfish/domains/dex ... -> org.glassfish.internal.api.DelegatingClassLoader@43de6a4f AT Thu Jun 02 14:19:14 CEST 2016 BY
Forum
3

mapping file is not being loaded

with the previous hibernate implementation. the java code that interacts with the Persistence api ... along with setting exclude-unlisted-classes to false. The Metamodel API still returns the empty set ... is produced. Did you try anything else except using the Metamodel API (storing objects, etc)? Does
JDO Doc
3

javax.jdo.PersistenceManager

that is declared in the metadata. Returns: the created instance Since: JDO 2.0 Query newNamedQuery ... must be the name of a query defined in metadata. Parameters: cls - the Class of candidate instances queryName - the name of the query to look up in metadata Returns: the new Query Since: JDO 1.0 Object
Forum
2

Indexing a field results in internal Exception

of JDO as it's a hugely easer API and gets work done with a lot less metadata.  Unfortunately ... /JDO, when using ObjectDB no need to use much metadata in either of them, so you can stay with JPA and just remove the ORM metadata when switching to ObjectDB. We have been very long-term supporters
JPA Doc
2

javax.persistence.TypedQuery

SELECT query or a Criteria API query Since: JPA 2.0 int getMaxResults() The maximum number of results ... a Criteria API query Since: JPA 2.0 TypedQuery setLockMode( LockModeType lockMode) Set the lock ... - if the query is found not to be a Java Persistence query language SELECT query or a Criteria API