on 07-16-2009 9:16 AM
HI Friends,
I am facing bit too many errors while working with JPA.unfortunately we dont have proper examples which can provided clarity.
Here in my case : I have Two Entities
One to One bidirectional.
EMPLOYEE
CUBICLE.
Employee.java
@Entity
@Table(name = "CS1_EMPLOYEE")
public class Employee {
@Id
private int id;
private String name;
@OneToOne(cascade=CascadeType.ALL)
private Cubicle cubicle;
public int getId() {
return id;
}
public void setId(int id) {
this.id = id;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public Cubicle getCubicle() {
return cubicle;
}
public void setCubicle(Cubicle assignedCubicle) {
this.cubicle = assignedCubicle;
}
}
Cubicle.java
@Entity
@Table(name = "CS1_CUBICLE")
public class Cubicle {
@Id
private int id;
private String cubeName;
// Bidirectional
@OneToOne(mappedBy="cubicle",cascade=CascadeType.ALL)
private Employee employee;
public int getId() {
return id;
}
public void setId(int id) {
this.id = id;
}
public String getCubeName() {
return cubeName;
}
public void setCubeName(String cubeName) {
this.cubeName = cubeName;
}
public Employee getEmployee() {
return employee;
}
public void setEmployee(Employee residentEmployee) {
this.employee = residentEmployee;
}
}
*sql file*
CREATE TABLE "CS1_EMPLOYEE"
(
"ID" Integer NOT NULL,
"NAME" Varchar (12) UNICODE,
"CUBICLE_ID" Integer,
PRIMARY KEY ("ID")
);
CREATE TABLE "CS1_CUBICLE"
(
"ID" Integer NOT NULL,
"CUBENAME" Varchar (12) UNICODE,
PRIMARY KEY ("ID")
);
Session Bean(EJB)
when i test this method i am gettig the error(Method In Bean)
public Cubicle findCubicleById(int id)
{
String jpql = "select c from Cubicle c where c.id = " +id;
Query q = em.createQuery(jpql);
Cubicle c = (Cubicle)q.getSingleResult();
return c;
}
error
[com.sun.istack.SAXException2: A cycle is detected in the object graph. This will cause infinitely deep XML: com.sap.com.jpacasestudy1.model.Employee@1ae5bf7 -> com.sap.com.jpacasestudy1.model.Cubicle@75e38d -> com.sap.com.jpacasestudy1.model.Employee@1ae5bf7])->com.sap.engine.services.webservices.espbase.server.additions.exceptions.ProcessException: Connection IO Exception. Check nested exception for details. (Exception; nested exception is: javax.xml.bind.MarshalException
I am unable to trace what the error is.Any help from SDN Experts?
Regards
Chandra Dasari
Edited by: chandra shekar dasari on Jul 16, 2009 1:48 PM:ver1te
Edited by: chandra shekar dasari on Jul 16, 2009 1:49 PM:code re
Unfortunately, even this thread is unanswered, i am closing the thread.as it it creating problems for further posting
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