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37

Embedded Object inside another embedded object - is that possible?

I have an entity with an embedded object - it works fine. Now I am trying to add an embedded object inside the first level embedded object - but it does not seem to store it and does not throw either... I was wondering if it was a limitation or not? has anyone tried this before? Thanks EKK Emmanuel
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ObjectDB License

) with the restriction of a maximum of 10 entity classes and one million entity objects per database file ... on a single computer. A license is required for every machine on which ObjectDB databases are managed, but using ObjectDB on client machines merely to access remote ObjectDB databases (for which licenses
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Chapter 2 - JPA Entity Classes

JPA Entity classes are user defined classes whose instances can be stored in a database. To store data in an ObjectDB database using JPA you have to define entity classes that represent your application data object model. This chapter explains how to define and use entity classes.
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General Settings and Logging

data, such as query results that contain millions of objects. The <temp> element specifies temporary ... database URLs for use by the Explorer. The size attribute specifies the maximum size of this list ... recently used databases in the Explorer easier. The <log> element <log path="$objectdb/log/" max
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Step 4: Run the Application

will use the existing database file to store an additional 1000 objects. You can view the content of the database file by opening it in the ObjectDB Explorer: This is the end of the Eclipse JPA tutorial ... ) When you run the application for the first time, a new ObjectDB database file is generated in
1

Step 4: Add a Controller Class

Guest entity object is constructed and stored in the database. Processing is forwarded to a JSP page ... the GuestDao component to display the existing Guest objects. The returned ModelAndView object defines
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Step 4: Add a Controller Class

entity object is constructed and stored in the database. Processing is forwarded to a JSP page ... component to display the existing Guest objects. The returned ModelAndView object defines a target JSP
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JPA Tutorials

The 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
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Step 4: Create an ObjectDB Data Set

Queries against the database are represented in BIRT as data sets. To create the data set: Open ... Points). Enter a data set name (e.g. Points by X) and click Next. The database in this tutorial contains Point entity objects. We will use a simple JPQL query that retrieves points with x value in
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[ODB1] Chapter 8 - ObjectDB Server

An ObjectDB server can manage one or more databases. Databases that are managed by a server ... these databases from remote machines by TCP/IP. More details about client server mode vs. embedded database mode are discussed in Section 1.2. Because the JDO API and the format of the database file

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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