About Object Database

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Manual
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WHERE clause (JPQL / Criteria API)

JPQL query that retrieves selective objects from the database. Out of the four optional clauses ... of this query defines an iteration over all the Country objects in the database using the c range ... the WHERE predicate. For entity classes with millions of objects in the database there is a huge
FAQ
13

What is the Java Persistence API (JPA)?

. Using plain old Java objects (POJO) to represent persistent data can significantly simplify database ... and objects). ObjectDB is the only database management system with built in support of the Java ... The Java Persistence API (JPA) is a standard API for accessing databases from within Java
JPA Doc
13

JPA Exceptions

to retrieve entity objects from the database. For example, when a required entity object is not found: or ... JPA exceptions are represented by a hierarchy of unchecked exceptions: java.lang.Object java ... , an attempt to update the database with no active transaction is represented by: Database update
FAQ
13

What is ObjectDB?

ObjectDB is an Object Oriented Database Management System (ODBMS). It provides all the standard database management services (storage and retrieval, transactions, lock management, query processing ... objects (and graphs of objects) in an ObjectDB database directly. There's no need to define tables or
Manual
12

Chapter 6 - Configuration

The ObjectDB configuration file contains one root element with seven subelements: ... <database> ... database> ... ... ... ... ...
Manual
12

Index Definition

Querying without indexes requires iteration over entity objects in the database one by one. This may take a significant amount of time if many entity objects have to be examined. Using proper indexes ... . When an entity object is stored in the database every indexed field must contain either null or
Tutorial
12

Step 3: Define a Spring DAO Component

Operations on the database will be performed by an instance of a Data Access Object (DAO ... - for storing a new Guest entity object in the database. getAllGuests - for retrieving all the existing Guest objects from the database. By using Spring components we can move some work from
Tutorial
12

Step 3: Define a Spring DAO Component

Operations on the database will be performed by an instance of a Data Access Object (DAO ...  Guest entity object in the database. getAllGuests - for retrieving all the existing Guest objects ... .annotation.Transactional; @Component public class GuestDao { // Injected database connection
Manual
12

Chapter 1 - Quick Tour [2010-10-29]

on how to start using JPA in your IDE with the ObjectDB object database. Given the simplicity of ObjectDB, that should be quick and easy even for a novice. ... ObjectDB databases and perform basic CRUD operations (Create/Store, Retrieve, Update and Delete) on ObjectDB databases. The example program that this chapter presents manages a simple database
Manual
12

Chapter 1 - Quick Tour

on how to start using JPA in your IDE with the ObjectDB object database. Given the simplicity of ObjectDB, that should be quick and easy even for a novice. ... ObjectDB databases and perform basic CRUD operations (Create/Store, Retrieve, Update and Delete) on ObjectDB databases. The example program that this chapter presents manages a simple database