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Hibernate mapping error

 
Greenhorn
Posts: 2
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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.
 
Ranch Hand
Posts: 64
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Instead of location.parkingSpot did you mean locationDetails.parkingSpot ?
 
Mino Petite
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Craig,

Thanks for taking the time to reply.
But base on the example giving on this documentation, Example 3 Here they have it as location.parkingSpot, and even if i changed i get a similar error message.

thanks again...
 
Craig Taylor
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You're right ... I was looking at the class definitions incorrectly.

Off-hand I'm not sure what the issue is ... Later tonight I'll try to recreate your project and see what I find.
 
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