TestNG dataprovider with custom object return null values and duplicate output

Country.java public class Country implements Serializable { @Id @GeneratedValue(strategy = GenerationType.IDENTITY) @Column private Long id; @NotNull @Size(min = ConstantsNumeric.TWO, max = ConstantsNumeric.FIVE) @Column(length = ConstantsNumeric.FIVE, nullable = false , unique = true ) private String sigla; @NotNull @Size(min = ConstantsNumeric.TWO, max = ConstantsNumeric.FIFTY) @Column(length = ConstantsNumeric.FIFTY, nullable = false ) private String name; //getters and setters CountryDAOTest.java public class CountryDAOTest extends Arquillian { @Deployment public static Archive<?> createDeployment() { File[] files = Maven.resolver().loadPomFromFile( "pom.xml" ).importRuntimeDependencies().resolve() .withTransitivity().asFile(); final JavaArchive jar = ShrinkWrap.create(JavaArchive.class).addClass(Country.class) .addAsResource( "test-persistence.xml" , "META-INF/persistence.xml" ) .addAsManifestResource(EmptyAsset.INSTANCE, "beans.xml" ); final EnterpriseArchive ear = ShrinkWrap.create(EnterpriseArchive.class).addAsLibraries(files).addAsModule(jar); return ear; } @Test(dataProvider = "dataListObject" ) public void testDataProviderObject(Country country) { Assert.assertNotNull(country); Assert.assertNotNull(country.getName()); } @DataProvider public Object [][] dataListObject() { final Country country1 = new Country(); country1.setName( "Portugal" ); country1.setSigla( "pt" ); final Country country2 = new Country(); country2.setName( "Brasil" ); country2.setSigla( "br" ); final Country country3 = new Country(); country3.setName( "França" ); country3.setSigla( "fr" ); final Object [][] data = new Object [][] { { country1 }, { country2 }, { country3 } }; return data; } }