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10

What is the Java Persistence API (JPA)?

are Object Relational Mapping (ORM) tools. The mapping bridges between the data representation in
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Database Schema Evolution

collection or array that can contain that object as en element. From any map type to any map type as
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JPA 2 Annotations

other JPA annotations are designated for Object Relational Mapping (ORM) JPA providers (for mapping
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Paths and Types in JPQL and Criteria API

Instances of user defined persistable classes (entity classes, mapped super classes and embeddable classes) are represented in JPQL by the following types of expressions: Variables - FROM ... class. The dot (.) operator cannot be applied to collections, maps and values of simple types
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javax.persistence.AttributeOverride

get methods) Used to override the mapping of a Basic (whether explicit or default) property or field or Id property or field. May be applied to an entity that extends a mapped superclass or to an embedded field or property to override a basic mapping or id mapping defined by the mapped superclass or
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javax.persistence.criteria.SetJoin

Since: JPA 2.0 Expression<M> get( MapAttribute<X,K,V> map) Create a path corresponding to the referenced map-valued attribute. Create a path corresponding to the referenced map-valued attribute. Parameters: map - map-valued attribute Returns: expression corresponding to the referenced attribute
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javax.persistence.criteria.Join

Since: JPA 2.0 Expression<M> get( MapAttribute<X,K,V> map) Create a path corresponding to the referenced map-valued attribute. Create a path corresponding to the referenced map-valued attribute. Parameters: map - map-valued attribute Returns: expression corresponding to the referenced attribute
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javax.persistence.criteria.PluralJoin

of the given name does not otherwise exist Since: JPA 2.0 Expression<M> get( MapAttribute<X,K,V> map) Create a path corresponding to the referenced map-valued attribute. Create a path corresponding to the referenced map-valued attribute. Parameters: map - map-valued attribute Returns: expression
1

[ODB1] Chapter 3 - Persistent Classes

, LinkedList, Vector, HashMap, TreeMap and Hashtable, and the interfaces - Collection, Set, List and Map ... collection interfaces (Collection, Set, List and Map) cannot refer to an unsupported collection, or
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javax.jdo.JDOHelper

See Also: getPersistenceManagerFactory(Map,String,ClassLoader,ClassLoader) PersistenceManagerFactory getPersistenceManagerFactory(Map ... See Also: getPersistenceManagerFactory(java.util.Map,ClassLoader) PersistenceManagerFactory getPersistenceManagerFactory(File ... : name - Since: JDO 2.1 See Also: getPersistenceManagerFactory(Map,String,ClassLoader,ClassLoader

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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