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Database Management Settings

. The resize attribute specifies the size by which to extend the database file when additional space

JPA 2 Annotations

JPA defines dozens of annotations that can be divided into the following groups: Annotations for JPA aware classes: Annotations for fields in JPA persistable classes: Annotations for additional JPA configuration: Annotations for JPA lifecycle event callbacks: Java EE container annotations: Many

Collections in JPQL and Criteria Queries

is TRUE if languages does not contain 'English'. [NOT] IN The [NOT] IN operator provides an additional

Strings in JPQL and Criteria Queries

l4 = cb.notLike(path, "a%"); // additional methods take also an escape character // LENGTH

Database Schema Evolution

Modifications to entity classes that do not change their persistent field definitions (their schema) are transparent to ObjectDB. This includes adding, removing and modifying constructors, methods and non persistent fields. However, additions, deletions and modifications to the persistent fields

Logical Operators in JPQL and Criteria API

Additional factory methods are available for a variant number of predicates: Predicate p3 = cb

JPA / JDO Class Enhancer

addition, a class loader for loading classes for enhancement can be specified as a second argument: com

Setting and Tuning of JPA Queries

a LockTimeoutException. Query Hints Additional settings can be applied to queries via hints. Supported Query

Step 6: Set the Spring XML

dispatcher servlet. Additional spring configuration is set in another XML file (whose name is derived from

Which API should I use - JPA or JDO?

API, and if necessary, switch to JDO as a secondary API for special additional features

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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