Hi,
I followed example 3 on the JEE6 documentation
http://java.sun.com/javaee/6/docs/api/javax/persistence/OneToOne.html for One-to-one association from an embeddable class to another entity, and get mapping errors on Eclipse:
If I put all three classes in the same Java file, the errors go away. Please help!
Here is the persistance.xml file:
Code:
<?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 are the entity classes:
In Employee.java
Code:
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;
}
In LocationDetails.java
Code:
package com.test;
import javax.persistence.Embeddable;
import javax.persistence.OneToOne;
@Embeddable
public class LocationDetails {
int officeNumber;
@OneToOne ParkingSpot parkingSpot;
}
In ParkingSpot.java
Code:
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;
}
Thank you very much in advance.
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