JPA Oracle Dialect does not support identity key generation??

[mulation]

Anybody please provide some help.

I have a table in Oracle database, like this:

  CREATE TABLE "CONTENT_WK"
  (
    "ID" varchar2(32) DEFAULT rawtohex(sys_guid()) NOT NULL ENABLE,
    "CONTENT" VARCHAR2(255 BYTE) NOT NULL ENABLE
  )

And here is my entity class:

/**
* ContentWk generated by hbm2java
*/
@Entity
@Table(name = "CONTENT_WK")
public class ContentWk implements java.io.Serializable {

    @Id
    @GeneratedValue(strategy = GenerationType.IDENTITY)
    @Column(name = "ID", unique = true, nullable = true, length = 32)
    @Length(max = 32)
    public String getId() {
        return this.id;
    }

    public void setId(String id) {
        this.id = id;
    }


    @Column(name = "CONTENT", nullable = false, columnDefinition = "nvarchar2", length = 512)
    @NotNull
    public String getContent() {
        return this.content;
    }

    public void setContent(String content) {
        this.content = content;
    }
   
    // constructor
    // .....
   
}


JPA throw some exception like this:
Caused by: java.lang.IllegalArgumentException: Dialect does not support identity key generation
        at org.hibernate.ejb.AbstractEntityManagerImpl.persist(AbstractEntityManagerImpl.java:216)
        at org.jboss.seam.persistence.EntityManagerProxy.persist(EntityManagerProxy.java:137)
        at org.jboss.seam.framework.EntityHome.persist(EntityHome.java:84)

[mulation]

Have to use Hibernate related annotations

    @GeneratedValue(strategy = GenerationType.IDENTITY, generator = "system-uuid")
    @GenericGenerator(name = "system-uuid", strategy = "uuid")

Now, a minor problem is that generated uuid is in lowercase, but anyway, as long as it is still UUID, let it be.

[mulation]

Change

@GenericGenerator(name = "system-uuid", strategy = "uuid")

to

@GenericGenerator(name = "system-uuid", strategy = "guid")


the lower case problem can be solved also!