57 | JPA Query APIQueries are represented in JPA 2 by two interfaces - the old Query interface, which was the only interface available for representing queries in JPA 1, and the new TypedQuery interface that was introduced in JPA 2. The TypedQuery interface extends the Query interface. In JPA 2 the Query interface |
56 | CRUD Database Operations with JPAGiven an EntityManager, em, that represents a JPA connection to the object database, we can use ... persisting objects in the database in more detail. JPA Queries with JPQL We can get the number of Point ... COUNT(p) FROM Point p") instructs JPA to count all the Point objects in the database |
56 | What is the Java Persistence API (JPA)?The Java Persistence API (JPA) is a standard API for accessing databases from within Java applications. The main advantage of JPA over JDBC (the older Java API for interacting with databases) is that in JPA data is represented by classes and objects rather than by tables and records as in JDBC |
55 | Defining a JPA Entity ClassTo be able to store Point objects in the database using JPA we need to define an entity class. A JPA entity class is a POJO (Plain Old Java Object) class, i.e. an ordinary Java class that is marked ... is an ordinary Java class. The only unique JPA addition is the @Entity annotation, which marks the class as |
54 | JPA Reference (JavaDoc)This reference contains the API documentation (similar to JavaDoc) of the Java Persistence API (JPA) 2.0. The content is derived from the original JPA documentation (in the EclipseLink JPA 2 RI) with some additions and notes. The four most basic JPA types are: All the other JPA types are organized |
53 | Database Connection using JPAWorking with the Java Persistence API (JPA) consists of using the following interfaces: Overview ... for Query instances, which are needed for executing queries on the database. Every JPA implementation ... of ObjectDB classes that implement these interfaces, and because standard JPA interfaces are used |
11 | JPA TutorialsThe following tutorials demonstrate how to develop database driven applications using JPA and the ObjectDB ODBMS (Object Oriented Database Management System). Console JPA Tutorial The Quick Start tutorial demonstrates how to use ObjectDB and JPA in a console application: Quick Start with JPA |
10 | Getting Started with JPAThis tutorial demonstrates how to create and run a simple JPA application. The demonstrated application uses JPA to store and retrieve simple Point entity objects, where each Point has two persistent fields - x and y. If you already know JPA - the source code will be straightforward |
10 | Eclipse/JPA Spring MVC Web TutorialThis is the Eclipse version of the Spring MVC and JPA tutorial. It demonstrates how to create and run a full Java Spring MVC (Model View Controller) web application in Eclipse - using ObjectDB, JPA ... are listed below the form: Persistence is managed by JPA. Every visitor that has signed the guestbook |
5 | 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 |
