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Manual
5

Locking in JPA

by another transaction. When using ObjectDB, optimistic locking is enabled by default and fully ... is completely automatic and enabled by default in ObjectDB, regardless if a version field (which is required by
Manual
5

JPA / JDO Class Enhancer

to be enhanced. Enhancement improves efficiency in three ways: Enhanced code enables efficient ... notifies ObjectDB whenever a persistent field is modified. Enhanced code enables lazy loading
JPA Doc
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javax.persistence.criteria.CriteriaQuery

roots Since: JPA 2.0 Selection getSelection() Return the selection of the query, or null if no selection has been set. Return the selection of the query, or null if no selection has been set. Returns: selection item Since: JPA 2.0 AbstractQuery groupBy(List> grouping) Specify
Tutorial
4

Java EE 6 JPA Tutorial - NetBeans Project

: Select File > Open Project.... Select the guestbook-jee6 directory and click Open Project. Run the project: Select Run > Run Main Project... (or F6). Choose or define the server and click OK
Tutorial
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JPA Web App Tutorial - NetBeans Project

the project zip file: JPA Web Application - Maven Project (6KB). Open the Maven project in NetBeans: Select File > Open Project.... Select the guestbook-web directory and click Open Project. Run the project: Select Run > Run Main Project... (or F6). Choose or define the server and click OK. If  a browser
Tutorial
4

Spring MVC JPA Tutorial - NetBeans Project

To open and run the Spring MVC JPA tutorial project in NetBeans: Download and extract the project zip file: Spring MVC JPA - Maven Project (7KB). Open the Maven project in NetBeans: Select File > Open Project.... Select the guestbook-spring directory and click Open Project. Run the project: Select
Tutorial
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Step 1: Create a Java Project

We start by creating a new NetBeans Project: Open the [New Project] dialog box, e.g. by using File > New Project... Select Java > Java Application and click Next. Choose a Project Name (e.g. Tutorial ... ] window and select Add Jar/Folder... Select the objectdb.jar file from the bin subdirectory
Tutorial
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Step 3: Add a Main Class

: Query q1 = em.createQuery("SELECT COUNT(p) FROM Point p"); System.out.println("Total ... .createQuery("SELECT AVG(p.x) FROM Point p"); System.out.println("Average X: " + q2 ... > query =  em.createQuery("SELECT p FROM Point p", Point.class); List results
Tutorial
4

Step 4: Create an ObjectDB Data Set

and selecting New Data Set. Select the data source that was created in the previous step (e.g. ObjectDB ... a specified range: SELECT p.x as x, p.y as y FROM Point p WHERE p.x BETWEEN :low AND :high Use copy
Tutorial
4

Step 5: Design a BIRT Report Chart

In this step we will add a simple chart to the report: Open the [New Chart] dialog box by dragging a Chart from the [Palette] window and dropping it on the report design (.rptdesign) layout. In the [Select Chart Type] tab select Tube as the chart type and click Next. In the [Select Data] tab