Class "model.Address" is listed in the persistence.xml file but not mapped

Question

I have created a `JPA` project. In that Eclipse displays the following error on the entity class. Class "model.Address" is listed in the `persistence.xml` file but not mapped How am I supposed to map the entity class in `persistance.xml`? Here is the `model.Address` entity: ``` package model; import java.io.Serializable; import javax.persistence.*; @Entity public class Address implements Serializable { @Id @GeneratedValue(strategy = GenerationType.SEQUENCE) private long id; private String city; private String country; private String province; private String postalCode; private String street; // Getters/setters omitted for brevity. } ``` Here is the `persistence.xml`: ``` org.eclipse.persista…

Accepted Answer

This is an Eclipse quirk. I recently had exactly this problem when I created a new JPA project with the JPA library configuration disabled, but didn't manually configure the JPA libraries before I created the entities by the Eclipse New JPA Entity wizard. After creating the entities I configured the JPA libraries in project's Build Path (just by adding target Java EE server runtime in Libraries), but the validation error still remains. I could solve it in at least one of following ways:

- Rightclick `persistence.xml` file, JPA Tools -> Synchronize Class List.

- Or, rightclick project, Validate.

- Or, close/reopen project.

This is consistently reproducible. I was using Eclipse Indigo SR1. When I create the entities after configuring the JPA libraries, this validation error doesn't occur.

Class "model.Address" is listed in the persistence.xml file but not mapped

Solution

Problem