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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:

address; : } In the example above, the Employee entity class contains

, and is equivalent to a JPQL query string (i.e. to a String instance containing JPQL

. It is contained in the objectdb.jar file. You can run it from the command line as

contains four elements - two of which are required and two are optional. The two required elements

fields can be stored by ObjectDB simply as part of the containing object. Relational databases lack

The best source for learning ObjectDB is the ObjectDB Manual, which contains all the necessary information for using ObjectDB. The only required background is a good understanding of the Java language. Reading the manual and getting started with ObjectDB

.1 or JBoss AS 6. If you need a web application that can run on a simple servlet container (such as

work from the application to the Spring Framework. For instance, in this example the Spring container

> The JSP generates the guestbook page output, which contains a simple