Fast Object Database for Java - with JPA/JDO support

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Step 2: Entity Class and Persistence Unit

.persistence.Id; @Entity public class Guest implements Serializable { private static final long serialVersionUID = 1L; // Persistent Fields: @Id @GeneratedValue Long id
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Getting Started with JPA and NetBeans

. For this tutorial, besides the Java JDK (5 or above) and the NetBeans IDE (any bundle that includes Java
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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 binitbhaskar Binit
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Get multiple entities by Id

I'm trying to fetch a list of entities, by their Id. I Use this query: SELECT c FROM User c WHERE c.id IN :ids This querey works as long as I don't set the property "id" as @Id. If i set @Id to any other member, this query works, if I set id as @Id, it stops working and gives zero results
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IDs of Entities suddenly became UUIDs?

do have a UUID String as their id instead of Long which is of course causing a lot of troubles. Note that this even occurrs on the same "Table" -- some saved Entitities of same type do still have a Long ID ... : @Id @GeneratedId private Long myId; This has always been working, however, suddenly partial
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Conflicting modifiers .... (javax.persistence.Id, javax.persistence.ManyToOne)

modifiers for field uk.co.his.experiment8.cmdline.objdb.CompoundKeyMapItem.container (javax.persistence.Id ... .CompoundKeyMapItem.container (javax.persistence.Id, javax.persistence.ManyToOne) at com.objectdb.o.MSG.d(MSG ... ; import javax.persistence.FlushModeType; import javax.persistence.Id; import javax.persistence
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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
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On ensuring ID available after persist

, which relies on an "external" entity object having a non-null id after it has been passed ... up to another element) I am using the following for the ID: @Id //@GeneratedValue(strategy ... AUTO public Long getId() { return id; } The javadocs for EntityManager.persist
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When using inheritance, you can specify, which ID to use

When storing objects with inheritance, it should be possible to choose, which ID (parent or child class) should be used for new object. For example: public EntityA() {     @Id     long id;     String field1; } public EntityB() extends EntityA() {     @Id     long id;     String field2
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Wrong @Id type

Hi, I have noticed some values of id column suddenly switched to int, although it is declared as ... version are you using? Try the last ObjectDB version, which should fix this issue/ To repair IDs ... an ObjectDB version before the fix, with an UPDATE queries that change the IDs to the correct type

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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