hello all,

i'm trying to create a new record in an oracle xe database using webservices, entity and session beans. i get the error
"Caused by: org.hibernate.id.IdentifierGenerationException: ids for this class must be manually assigned before calling save():" when i try to create the record however.

i have annotated a column with the id value but when i try to create the record, it doesnt seem to recognise that?

here are my classes for clarity:

package domain;

import javax.persistence.*;
import org.jboss.web.WebService;
import org.jboss.wsf.spi.*;
import org.jboss.wsf.spi.annotation.WebContext;

@Entity
@Table(name="Audiorec")
@WebContext(contextRoot="/AVmanBean")
public class Audiorec implements java.io.Serializable{
 private int Barcode_audiorec;
 private String Audiorec_alias;
 private String Serial_audiorec;
 private String Media_audiorec;
 private String Formats_audiorec;

 public Audiorec() {
 }


 public Audiorec(String Alias, Integer Barcode, String Model, String Serial, String Media, String Formats, String Inputs, String Outputs) {
 super();
 this.Audiorec_alias = Alias;
 this.Barcode_audiorec = Barcode;
 this.Serial_audiorec = Serial;
}

 @Id
 @Column(name="Audiorec_alias")
 public String getAudiorec_alias( ) { return Audiorec_alias; }
 public void setAudiorec_alias(String alias) { this.Audiorec_alias = alias; }

 @Column(name="Barcode_audiorec")
 public int getBarcode_audiorec( ) { return Barcode_audiorec; }
 public void setBarcode_audiorec(int barcode) { this.Barcode_audiorec = barcode; }

 @Column(name="Serial_audiorec")
 public String getSerial_audiorec( ) { return Serial_audiorec; }
 public void setSerial_audiorec(String serial) { this.Serial_audiorec = serial; }

 @Column(name="Media_audiorec")
 public String getMedia_audiorec( ) { return Media_audiorec; }
 public void setMedia_audiorec(String media) { this.Media_audiorec = media; }

 @Column(name="Formats_audiorec")
 public String getFormats_audiorec( ) { return Formats_audiorec; }
 public void setFormats_audiorec(String formats) { this.Formats_audiorec = formats; }

}

and my session bean:

package Audiorec;

import javax.ejb.Stateless;
import javax.jws.WebMethod;
import javax.jws.WebParam;
import javax.persistence.EntityManager;

import javax.persistence.PersistenceContext;

import domain.Audiorec;
import javax.ejb.TransactionAttribute;
import javax.ejb.TransactionAttributeType;
import org.jboss.ws.annotation.*;
import javax.jws.WebService;
import org.jboss.wsf.spi.annotation.WebContext;

@Stateless
@WebService(name="AVmanBean", serviceName="AVmanBean")
//@WebContext(contextRoot="/AVmanBean")
public class AVmanBean implements AVmanRemote{
 @PersistenceContext
(unitName="AVmanBean")
private EntityManager manager;

 @TransactionAttribute(TransactionAttributeType.REQUIRED)
 public void createAudiorec(@WebParam(name = "Alias")
String Alias, @WebParam(name = "barcode")Integer Barcode, @WebParam(name = "serial")String Serial, @WebParam(name = "media")String Media)
 {
 Audiorec audiorec = new Audiorec();
 audiorec.setAudiorec_alias(Alias);
 audiorec.setBarcode_audiorec(Barcode);
 audiorec.setSerial_audiorec(Serial);
 audiorec.setMedia_audiorec(Media);

 manager.persist(audiorec);
 }

 public String findAudiorec(@WebParam(name = "Audiorec_alias")
 String alias) {
 Audiorec arrr = manager.find(Audiorec.class, alias);
 return arrr.getSerial_audiorec();
 }


}

i am able to search records through my webservices so i'm hoping nothing's majorly out of place but i'm a bit stumped on this id thing. i'm reading up on hibernate right now but i thought i'd just throw it out here if anyone could steer me in the right direction

cheers for reading thus far :)