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JDO Doc
176

JDO Predefined ID Classes

An object ID is a combination of a persistence capable class and a primary key. It provides a unique representation of a persistent object. The following classes serve as predefined ID classes for persistence capable classes with a simple single field primary key: Object IDs are used in many
JPA Doc
53

javax.persistence.Id

javax.persistence Annotation Id Target: Fields (including property get methods) Specifies the primary key of an entity. The field or property to which the Id annotation is applied ... : @Id public Long getId() { return id; } Since: JPA 1.0 See Also: Column GeneratedValue Learn
JDO Doc
51

Constants.PMF_ATTRIBUTE_SERVER_TIME_ZONE_ID

Static Field javax.jdo.Constants String PMF_ATTRIBUTE_SERVER_TIME_ZONE_ID The name of the persistence manager factory element's "server-time-zone-id" attribute. Since: JDO 2.1
JDO Doc
50

Constants.PROPERTY_SERVER_TIME_ZONE_ID

Static Field javax.jdo.Constants String PROPERTY_SERVER_TIME_ZONE_ID Mapping "javax.jdo.option.ServerTimeZoneID" Since: JDO 2.1
Manual
30

JPA Primary Key

an object database, ObjectDB supports implicit object IDs, so an explicitly defined primary key is not ... key field: @Entity public class Project { @Id @GeneratedValue long id; // still set automatically : } The @Id annotation marks a field as a primary key field. When a primary key field
Manual
26

Auto Generated Values

number generator for every database. This number generator is used to generate automatic object IDs ... @GeneratedValue with the AUTO strategy: @Entity public class EntityWithAutoId1 { @Id @GeneratedValue(strategy=GenerationType.AUTO) long id; : } AUTO is the default strategy, so the following
Tutorial
22

Step 1: Create a Maven Web Project

a filter, select maven-archetype-webapp in the artifact list and click Next. Enter Group Id (e.g. Guestbook), Artifact Id (e.g. Guestbook), Version (e.g. 1.0) and Package (guest), and click Finish ... >      <id>objectdbid>    ObjectDB Repository
Result
21

ObjectDB Object Database Features

. Persistence is set using JPA/JDO annotations (e.g. @Entity, @Id, @Index). Transparent activation ... ObjectDB with no @Id field. Simple primary key - a single @Id field. Composite primary key - multiple @Id fields or a @EmbeddedId field. Primary Key Data Types Primitives (boolean, byte, short, char
Tutorial
21

Step 1: Create a Maven Web Project

Name (e.g. Guestbook) and select Java EE 5. Enter Maven Group Id (e.g. com.objectdb.tutorial.spring ... .sourceEncoding>      <id>objectdbid>    ObjectDB ... >        <id>enhanceid>        process-classes                java
Forum
19

ID format in objectdb 2.x for JDOHelper.getObjectId

db tuotrial. I am just wondering, in objectdb 1.x, when i am tring to get the object id ... .toString() = 3:1 , which is not an integer and this object has two feild object id and type id ... to 2.x. And how can i just get the object id without type id. Thanks, Binit In ObjectDB 1.x object