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Chapter 4 of the ObjectDB/JPA manual. int executeUpdate() Execute an update or delete statement. Execute an update or delete statement. Returns: the number of entities updated or deleted Throws: IllegalStateException - if called for a Java Persistence query language SELECT statement or for a criteria

JPA Query Expressions (JPQL / Criteria)

] MEMBER [OF] and the [NOT] LIKE operator. Logical operators: AND, OR, NOT. In addition, JPA queries ... , isMember, isNotMember, size). Comparison expressions (equal, notEqual, gt, ge, lt, le, between, isNull, ...) Logical expressions (and, or, not, isTrue).

What are the system requirements for using ObjectDB?

ObjectDB requires Java 5 or later (Java 6 is preferred). As a pure Java application, ObjectDB should be able to run on any platform that supports the Java Standard Edition. Either the Java Development Kit (JDK) or the Java Runtime Environment (JRE) can be used. A version of ObjectDB for .NET is currently under development.

Eclipse/JPA Spring MVC Web Tutorial

, Tomcat (or GlassFish) and Maven. The demo web application manages a basic guestbook page ... database. Required Software For this tutorial you will need the following software: Java JDK 6.0 (or

JPA Web App Tutorial - Maven Project

The JPA Web Application tutorial provides step by step instructions on how to build a simple Java/JPA database driven web application (for Tomcat / Jetty) in Eclipse or NetBeans. Building a new ... for the Jetty embedded server. No need to download and install ObjectDB or a Java web server - Maven

JPA Web App Tutorial - NetBeans Project

Run > Run Main Project... (or F6). Choose or define the server and click OK. If a browser is not opened - open it at http://localhost:8080/Guestbook/.

Step 3: Add a Context Listener Class

a ServletContextListener to perform initialization and cleanup operations: The database will be opened (or created ... . The database will be closed when the web application stops (or when the web server shuts down), by

Getting Started with JPA and Eclipse

. For this tutorial, besides the Java JDK (5 or above) and the Eclipse IDE (either Eclipse IDE for Java EE Developers or Eclipse IDE for Java Developers), you only need to download and extract the ObjectDB distribution

NetBeans/JPA Web Application Tutorial

: Java JDK (6.0 or above). NetBeans - Java or All bundle The last version of ObjectDB (just download


javax.jdo Interface FetchGroup FetchGroup represents a named fetch group for a specific class or interface. A fetch group instance identifies the name of the class or interface, the list of members (fields or properties) to be fetched when the fetch group is active, and the recursion depth for each

Getting Started

ObjectDB is very easy to use. Follow the Getting Started Tutorial and the Quick Tour manual chapter and in minutes you may be able to write and run first Java programs against ObjectDB.

Prior knowledge or experience in database programming (SQL, JDBC, ORM, JPA, etc.) is not required, but some background in using the Java language is essential.

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