Test-Case for https://bugs.eclipse.org/bugs/show_bug.cgi?id=497143

persistence.xml

<?xml version="1.0" encoding="UTF-8" ?>
<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/persiste"
			 version="2.0" xmlns="http://java.sun.com/xml/ns/persistence">
	<persistence-unit name="persistenceUnit" transaction-type="RESOURCE_LOCAL">

		<class>example.SampleWithSharedPK</class>
		<class>example.SharedPKEntity</class>

		<exclude-unlisted-classes>true</exclude-unlisted-classes>

		<properties>
			<property name="javax.persistence.jdbc.driver" value="org.apache.derby.jdbc.EmbeddedDriver"/>
			<property name="javax.persistence.jdbc.url" value="jdbc:derby:simpleDb;create=true"/>
			<property name="javax.persistence.jdbc.user" value="EclipseJPAExample"/>
			<property name="javax.persistence.jdbc.password" value="EclipseJPAExample"/>
		</properties>

	</persistence-unit>
</persistence>

pom.xml

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
		 xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
		 xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
	<modelVersion>4.0.0</modelVersion>

	<groupId>eclipselink</groupId>
	<artifactId>eclipselink</artifactId>
	<version>1.0-SNAPSHOT</version>

	<dependencies>
		<dependency>
			<groupId>org.apache.derby</groupId>
			<artifactId>derby</artifactId>
			<version>10.8.2.2</version>
		</dependency>
		<dependency>
			<groupId>org.apache.derby</groupId>
			<artifactId>derbytools</artifactId>
			<version>10.8.2.2</version>
		</dependency>
		<dependency>
			<groupId>org.eclipse.persistence</groupId>
			<artifactId>eclipselink</artifactId>
			<version>2.6.3</version>
		</dependency>
		<dependency>
			<groupId>org.eclipse.persistence</groupId>
			<artifactId>javax.persistence</artifactId>
			<version>2.1.1</version>
		</dependency>
	</dependencies>

</project>

SampleWithSharedPK.java

package example;

import javax.persistence.Entity;
import javax.persistence.Id;
import javax.persistence.MapsId;
import javax.persistence.OneToOne;

/**
 * @author Mark Paluch
 */
@Entity
public class SampleWithSharedPK {

	@Id
	Long id;

	@OneToOne @MapsId
	SharedPKEntity maps;

	String name;

	public Long getId() {
		return id;
	}

	public void setId(Long id) {
		this.id = id;
	}

	public SharedPKEntity getMaps() {
		return maps;
	}

	public void setMaps(SharedPKEntity maps) {
		this.maps = maps;
	}

	public String getName() {
		return name;
	}

	public void setName(String name) {
		this.name = name;
	}
}

SharedPKEntity.java

package example;

import javax.persistence.Entity;
import javax.persistence.Id;

/**
 * @author Mark Paluch
 */
@Entity
public class SharedPKEntity {

	@Id Long id;

	public Long getId() {
		return id;
	}

	public void setId(Long id) {
		this.id = id;
	}
}

TestCase.java

package example;

import javax.persistence.EntityManagerFactory;
import javax.persistence.Persistence;
import javax.persistence.metamodel.IdentifiableType;

/**
 * @author Mark Paluch
 */
public class TestCase {

	public static void main(String[] args) {

		EntityManagerFactory entityManagerFactory = Persistence.createEntityManagerFactory("persistenceUnit");

		IdentifiableType<SampleWithSharedPK> entity = entityManagerFactory.getMetamodel().entity(SampleWithSharedPK.class);
		entity.getId(entity.getIdType().getJavaType());
	}
}