About Metadata API

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Company

ObjectDB Software develops, markets and supports the ObjectDB Object-Oriented Database Management System (ODBMS). ObjectDB Software is the market leader in providing a very high performance persistence solution for Java, based on the Java Persistence API (JPA) and the Java Data Objects (JDO
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ObjectDB Developer's Guide [2018-08-07]

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
Manual
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ObjectDB 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
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What is new in ObjectDB 2.0?

ObjectDB 2.0 supports many new features and improvements, including: Most of the features of the new JPA 2.0 and JDO 2.2 APIs. User defined IDs (primary key) and sequences. Support of unlimited index keys size. SQL like queries ("select from ... where ..."). Real non blocking multithreading in
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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
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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
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Is ObjectDB better than Object Relational Mapping (ORM)?

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

two structured training courses: Master the Java Persistence API This course covers the JPA specification in
JDO Doc
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JDO Reference (JavaDoc)

This reference contains the API documentation (similar to JavaDoc) of JDO 2.2. The content is derived from the original JDO documentation with some additions and notes. The most basic JDO types are: All the other JDO types are organized into the following sections:
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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: