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Chapter 4 - JPA Queries (JPQL / Criteria)

well as how to use the JPA Criteria API, which provides an alternative way for building queries in JPA, based on JPQL. The first section describes the API that JPA provides for using dynamic and static

Retrieving JPA Entity Objects

The Java Persistence API (JPA) provides various ways to retrieve objects from the database. The retrieval of objects does not require an active transaction because it does not change the content of the database. The persistence context serves as a cache of retrieved entity objects. If a requested

Is ObjectDB better than Object Relational Mapping (ORM)?

for an existing old relational database). By using the Java Persistence API (JPA), you can develop

Chapter 3 - Using JPA

This chapter explains how to manage ObjectDB databases using the Java Persistence API (JPA). The first two pages introduce basic JPA interfaces and concepts: The next section explains how to use JPA for database CRUD operations: More advanced topics (e.g. locking and events) are discussed in the last section:

ObjectDB 2.8 Developer's Guide

Welcome to ObjectDB for Java/JPA Developer's Guide. Here you can learn how to develop database applications using ObjectDB and JPA (Java Persistence API). The main purpose of this guide is to make you productive with ObjectDB and JPA in a short time. Guide Structure This manual is divided into

Database Connection using JPA

Working with the Java Persistence API (JPA) consists of using the following interfaces: Overview A connection to a database is represented by an EntityManager instance, which also provides functionality for performing operations on a database. Many applications require multiple database connections

[ODB1] Chapter 1 - About ObjectDB

API is available today for most relational database systems (RDBMS), e.g. Oracle, IBM DB2 ... to the other can be done simply by changing a single string (the connection URL), because the JDO API


to malicious code. getMetadata This allows getting metadata for any PersistenceCapable class that has registered with JDOImplHelper. This is dangerous in that metadata information (possibly confidential ... metadata for any PersistenceCapable class that has registered with JDOImplHelper. This is dangerous in

[ODB1] Chapter 8 - ObjectDB Server

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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