About point
Defining a JPA Entity Class
Shows how to define a JPA entity class in order to store objects in the database. To be able to store Point objects in the database using JPA we need to define an entity class ... are marked as having the ability to be serialized. The Point Entity Class The following Point class, which represents points in the plane, is marked as an entity ...
Threaded Test - Failed to commit transaction: Unexpected internal exception
Hi I'm trying to create a simple producer-consumer queue scenario but am getting the followin exception: ... i<_num ; i ++ ) { Point p = new Point ( i, i + 1 ) ; put ( p ...
CRUD Database Operations with JPA
Shows how to use Java/JPA to store, retrieve, update & delete.... Objects The following code fragment stores 1,000 Point objects in the database: em. getTransaction ... ; i < 1000 ; i ++ ) { Point p = new Point ( i, i ) ; em. persist ...
Step 3: Add a Main Class
Explains how to add the JPA tutorial Main class in NetBeans.... (that was generated with the project) in order to store Point objects in the database and then retrieve them from the database. ... ( ) ; // Store 1000 Point objects in the database: em. getTransaction ( ) ...
Step 3: Add a Main Class
Explains how to add the JPA tutorial Main class in Eclipse.... a main class to the project with code that will store Point objects in the database and then retrieve them from the database: ... ( ) ; // Store 1000 Point objects in the database: em. getTransaction ( ) ...
BIRT/ODA ObjectDB Driver
Explains how to use the ObjectDB/JPA data source BIRT driver. The ObjectDB BIRT/ODA driver is an extension of the open source Business Intelligence and Reporting Tools (BIRT) that adds support of ObjectDB as a data source and JPQL as a data set query language. This page covers the following to ...
Step 4: Create an ObjectDB Data Set
Explains how to create an ObjectDB data set for BIRT reports.... The database in this tutorial contains Point entity objects. We will use a simple JPQL query that retrieves points ... SELECT p . x AS x , p . y AS y FROM Point p WHERE p . x BETWEEN :low AND :high Use copy and ...
Step 2: Define a JPA Entity Class
Explains how to create a JPA entity class in the NetBeans IDE.... selecting New > Java Class ... Enter Point as the class name - use exactly that case sensitive class name. ... persistence . *; @Entity public class Point implements Serializable { private static final ...
Step 2: Define a JPA Entity Class
Explains how to create a JPA entity class in the Eclipse IDE.... that case sensitive package name. Enter Point as the class name - use exactly that case sensitive ... persistence . *; @Entity public class Point implements Serializable { private static final ...
TemporalType injection with Calendar using JPA
I have ObjectDB JPA comsummed by a RESTful web service deployed on Tomcat. I am using an embedded object as a primary key, which has time fields which I have annotated with TemporalType.TIMESTAMP When I use a java.util.Date as a field on this object there is no problem. However, if I use a java.util.Calendar it encounters an exception. Calendar is what I need. Is there something obvious here that I am failing to see? ... TimePeriod id ; private List<Point> points ; public Chart ( ) { this . points = new ArrayList<Point> ( ) ; } @ ...
