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Manual
5

Numbers in JPQL and Criteria Queries

a specified argument and returns the absolute value, which is always a positive number or zero ... may be either another numeric expression or a simple Java numeric object: // Create path and parameter
Manual
5

Online Backup

An ObjectDB database can be backed up by simply copying or archiving the database file while the database is offline (i.e. when it is not open in an ObjectDB server and not in use by any application ... on an EntityManager (em) that represents the connection (local or remote) to the database:     em
Tutorial
5

Spring MVC JPA Tutorial - Maven Project

The Spring MVC JPA tutorial provides step by step instructions on how to build a simple Java/JPA Spring MVC database driven web application in Eclipse or NetBeans. Building a new application step by ... for the Jetty embedded server. No need to download and install ObjectDB or a Java web server - Maven
Tutorial
5

Spring MVC JPA Tutorial - NetBeans Project

 Run > Run Main Project... ( or F6). Choose or define Tomcat as a server and click OK. Note: To run
Tutorial
5

Step 2: Entity Class and Persistence Unit

) and selecting New > Entity Class... ( or New > Other... > Persistence > Entity Class and clicking ... the persistence.xml file in a text editor (by right clicking and selecting Edit or by double click
Tutorial
5

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
Tutorial
5

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
Manual
5

UPDATE SET Queries in JPA/JPQL

* 11 / 10 The UPDATE clause defines exactly one range variable (with or without an explicit variable name) for iteration. Multiple variables and JOIN are not supported. The SET clause defines one or
FAQ
5

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.
Manual
5

Working with JPA Entity Objects

the Configuration chapter. By default, managed entity objects that have not been modified or removed ... or soft references instead of weak references. The contains method can check if a specified entity