我开发了两组类 - 第一组只是类，而在第二组中，类派生自接口。这两组课程都相互模仿。它们的存储库也很相似。但是，存储库适用于第一组类（节点和关系）。但是对于第二组类，存储库能够插入记录，但findAll方法失败并且不会返回任何记录。
这是第一组具有存储库的类 -
public abstract class Entity {
@GraphId
private Long id;
public Long getId() {
return id;
}
public void setId(Long id) {
this.id = id;
}
@Override
public boolean equals(Object o) {
if (this == o) return true;
if (o == null || id == null || getClass() != o.getClass()) return false;
Entity entity = (Entity) o;
if (!id.equals(entity.id)) return false;
return true;
}
@Override
public int hashCode() {
return (id == null) ? -1 : id.hashCode();
}
}
public abstract class GenericRepository<T> implements IGenericRepository<T> {
private static final int DEPTH_LIST = 1;
private static final int DEPTH_ENTITY = 2;
private Session session;
public GenericRepository(String url, String username, String password) {
super();
session = Neo4jSessionFactory.getInstance().getNeo4jSession(url, username, password);
}
public Iterable<T> findAll() {
return session.loadAll(getEntityType(), DEPTH_LIST);
}
public T findOne(Long id) {
return session.load(getEntityType(), id, DEPTH_ENTITY);
}
public void delete(T entity) {
session.delete(session.load(getEntityType(), ((Entity) entity).getId()));
}
public T createOrUpdate(T entity) {
session.save(entity, DEPTH_ENTITY);
return findOne(((Entity) entity).getId());
}
public abstract Class<T> getEntityType();
}
@RelationshipEntity(type="MY_ROLE")
public class ARole extends Entity {
@Property
private String title;
@StartNode
private HomoSapiens start;
@EndNode
private HomoSapiens end;
public String getTitle() {
return title;
}
public void setTitle(String title) {
this.title = title;
}
public HomoSapiens getStart() {
return start;
}
public void setStart(HomoSapiens start) {
this.start = start;
}
public HomoSapiens getEnd() {
return end;
}
public void setEnd(HomoSapiens end) {
this.end = end;
}
public ARole() {}
public ARole(String title) {
this.title = title;
}
}
@NodeEntity
public class HomoSapiens extends Entity {
private String name;
@Relationship(type = "MY_ROLE", direction = Relationship.INCOMING)
private ARole aRole;
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public ARole getaRole() {
return aRole;
}
public void setaRole(ARole aRole) {
this.aRole = aRole;
}
public HomoSapiens() {}
public HomoSapiens(String name) {
this.name = name;
}
}
public class ARoleDao extends GenericRepository<ARole> implements IARoleDao {
public ARoleDao(String url, String username, String password) {
super(url, username, password);
}
@Override
public Class<ARole> getEntityType() {
return ARole.class;
}
}
这是第二组课程 -
public interface IARole {
String getTitle();
void setTitle(String title);
IHomoSapiens getStart();
void setStart(IHomoSapiens start);
IHomoSapiens getEnd();
void setEnd(IHomoSapiens end);
}
public interface IHomoSapiens {
String getName();
void setName(String name);
IARole getARole();
void setARole(IARole aRole);
}
@RelationshipEntity(type="MY_DERIVED_ROLE")
public class DerivedARole extends Entity implements IARole {
@Property
private String title;
@StartNode
private IHomoSapiens start;
@EndNode
private IHomoSapiens end;
public String getTitle() {
return title;
}
public void setTitle(String title) {
this.title = title;
}
public IHomoSapiens getStart() {
return start;
}
public void setStart(IHomoSapiens start) {
this.start = start;
}
public IHomoSapiens getEnd() {
return end;
}
public void setEnd(IHomoSapiens end) {
this.end = end;
}
public DerivedARole() {}
public DerivedARole(String title) {
this.title = title;
}
}
@NodeEntity
public class DerivedHomoSapiens extends Entity implements IHomoSapiens {
private String name;
@Relationship(type = "MY_DERIVED_ROLE", direction = Relationship.INCOMING)
private IARole aRole;
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public IARole getARole() {
return aRole;
}
public void setARole(IARole aRole) {
this.aRole = aRole;
}
public DerivedHomoSapiens() {}
public DerivedHomoSapiens(String name) {
this.name = name;
}
}
public class DerivedARoleDao extends GenericRepository<DerivedARole> {
public DerivedARoleDao(String url, String username, String password) {
super(url, username, password);
}
@Override
public Class<DerivedARole> getEntityType() {
return DerivedARole.class;
}
}
public class DerivedARoleDaoSpecs {
private DerivedARoleDao derivedARoleDao;
@Before
public void setUp() throws Exception {
derivedARoleDao = new DerivedARoleDao(DomainHelper.NEO_URL, DomainHelper.NEO_USERNAME,
DomainHelper.NEO_PASSWORD);
}
public void should_insert_data() {
IHomoSapiens start = new DerivedHomoSapiens("d-start");
IHomoSapiens end = new DerivedHomoSapiens("d-end");
IARole aRole = new DerivedARole("parent");
start.setARole(aRole);
end.setARole(aRole);
aRole.setStart(start);
aRole.setEnd(end);
IARole created = derivedARoleDao.createOrUpdate((DerivedARole)aRole);
assertThat(created, is(notNullValue()));
}
public void should_find_all() {
Iterable<DerivedARole> derivedARoles = derivedARoleDao.findAll();
assertThat(derivedARoles, is(notNullValue()));
assertThat(Iterables.isEmpty(derivedARoles), is(false));
assertTrue(Iterables.size(derivedARoles) > 0);
System.out.println(Iterables.size(derivedARoles));
}
@Test
public void should_do_crud() {
// should_insert_data();
should_find_all();
// should_find_by_id();
}
}
我在这里遗漏了什么吗？或者Neo4j OGM是否适用于类（不实现接口）？
整个源代码位于 - https://github.com/mmwaikar/java-neo-ogm-ex（如果有帮助）。 谢谢， 的Manoj。
答案 0 :(得分：2)
这应该在1.1.3
中修复直到发布，请使用1.1.3-SNAPSHOT尝试您的代码示例。
您需要包含
<repository>
<id>neo4j-snapshots</id>
<url>http://m2.neo4j.org/content/repositories/snapshots</url>
<snapshots>
<enabled>true</enabled>
</snapshots>
</repository>