Hi,
I am having a problem with mapping. I followed the example three given on the following page
here line by line.
Note: If I put all three classes in one
java file, my
IDE(Eclipse) does not give me any errors. However, if I put separate them into three different java files, I get the following errors:
Here is my persistance.xml file...
<?xml version="1.0" encoding="UTF-8"?>
<persistence version="1.0" xmlns="http://java.sun.com/xml/ns/persistence" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://java.sun.com/xml/ns/persistence
http://java.sun.com/xml/ns/persistence/persistence_1_0.xsd">
<persistence-unit name="JPA_3">
<provider>org.hibernate.ejb.HibernatePersistence</provider>
<class>com.test.Employee</class>
<class>com.test.LocationDetails</class>
<class>com.test.ParkingSpot</class>
<properties>
<property name="hibernate.dialect" value="org.hibernate.dialect.MySQLDialect"/>
<property name="hibernate.hbm2ddl.auto" value="create-drop"/>
<property name="hibernate.show_sql" value="true" />
<property name="hibernate.format_sql" value="true" />
<property name="hibernate.connection.driver_class" value="com.mysql.jdbc.Driver"/>
<property name="hibernate.connection.username" value="root"/>
<property name="hibernate.connection.password" value="root"/>
<property name="hibernate.connection.url" value="jdbc:mysql://localhost/test_db"/>
</properties>
</persistence-unit>
</persistence>
Here my entity classes...
/****************************************************************************************/
package com.test;
import javax.persistence.Embeddable;
import javax.persistence.OneToOne;
@Embeddable
public class LocationDetails {
int officeNumber;
@OneToOne ParkingSpot parkingSpot;
}
/****************************************************************************************/
package com.test;
import javax.persistence.Entity;
import javax.persistence.Id;
import javax.persistence.OneToOne;
@Entity
public class ParkingSpot {
@Id int id;
String garage;
@OneToOne(mappedBy="location.parkingSpot") Employee assignedTo;
}
/****************************************************************************************/
package com.test;
import javax.persistence.Embedded;
import javax.persistence.Entity;
import javax.persistence.Id;
@Entity
public class Employee {
@Id int id;
@Embedded LocationDetails location;
}
/****************************************************************************************/
Thank you very much for your help.