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FAQ
21

Which API should I use - JPA or JDO?

You can use ObjectDB with either the Java Persistence API (JPA) or the Java Data Objects (JDO) API. Both share similar architecture, design and abilities. When to prefer JPA JPA is more commonly used. Therefore, it might be the first choice for most new applications. You can use JPA as the primary
Tutorial
20

Step 1: Install BIRT and ObjectDB Driver

We start by installing the BIRT development environment and the ObjectDB data source driver ... , and finally approving the installation and restarting the IDE. Installing the ObjectDB Data Source Driver To install the ObjectDB data source driver for BIRT: Open the [Install] dialog box by selecting Help
JDO Doc
20

setResult(data)

Method javax.jdo.Query void setResult(   String data ) Specifies what type of data this query should return. If this is unset or set to null, this query returns instances of the query's candidate ... function results. Parameters: data - a comma-delimited list of expressions (fields, functions
Result
18

Eclipse Public License - v 1.0

, if any, and such derivative works, in source code and object code form. b) Subject to the terms ... the Contribution of such Contributor, if any, in source code and object code form. This patent ... by that Contributor alone and not by any other party; and iv) states that source code
Forum
14

Spring Data JPA

Hello! When i configure Spring Data JPA to use ObjectDB 2.4.0_03 i get an exception ... .getMetamodel(Unknown Source) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun ... $SharedEntityManagerInvocationHandler.invoke(SharedEntityManagerCreator.java:176) at $Proxy432.getMetamodel(Unknown Source
Tutorial
14

Step 3: Define a Spring DAO Component

Operations on the database will be performed by an instance of a Data Access Object (DAO ... clicking the guest package node (in the [Projects] window under Source Packages) and selecting New ... the content of the new source file with the following code: package guest; import java.util.List
Result
14

Eclipse Distribution License - v 1.0

and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met: Redistributions of source code must retain the above copyright notice ... GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
Forum
14

can not use spring-data-jpa repository with NamedQuery

:310) at $Proxy24.getParameters(Unknown Source) at org.springframework.data.jpa.repository.query ... in spring-data-jpa named queries are used to implement repository interface methods, see http://static.springsource.org/spring-data/data-jpa/docs/current/reference/html/#jpa.query-methods.named
Forum
14

Spring Data JPA - PersistenceException thrown

(Unknown Source) at org.springframework.data.jpa.repository.config ... (AbstractEntityManagerFactoryBean.java:541) at com.sun.proxy.$Proxy13.getMetamodel(Unknown Source) at org.springframework.data.jpa.repository.config.JpaMetamodelMappingContextFactoryBean.getMetamodels
Forum
14

em.flush(); em.clear(); loosing data and not persisting managed objects

storing data from files that was originally in a RDMS and exported as csv like files (1 file per table with one row per entry). These tables are the data from the backend of an antiquated source code/bug ... to get the data directly. The code is stored on the file system in SCCS, but the history of each change