无法识别 Eclipselink 实体

Question

我有可能依赖于其他版本的版本。依赖版本存储在列表 dependsOn 中。因为我需要能够确定，在哪些其他版本中使用了特定版本我有列表 usedIn 这是 dependsOn.

的倒数

我的问题是，一旦我将方法添加到 add/remove 来自 dependsOn 的单个版本，EclipseLink 就不再将我的 class Version 识别为实体。

我的版本class:

@Entity
@Table( name = "tbl_version" )
@NamedQueries( /*...*/ )
public class Version extends BaseEntity
{
    @ManyToMany
    @JoinTable( name = "tbl_depends_on",
        joinColumns = { @JoinColumn( name = "PK_VERSION" ) },
        inverseJoinColumns = { @JoinColumn( name = "PK_DEPENDENCY" ) }
    )
    private List<Version> dependsOn;

    @ManyToMany( mappedBy = "dependsOn" )
    private List<Version> usedIn;

    public void addDependency( Version dependency )
    {
        if( dependency == null )
        {
            return;
        }
        dependsOn.forEach( ( Version version) -> 
        {
            if( dependency.equals( version ) )
            {
                return;
            }
        } );
        dependsOn.add( dependency );
    }

    public void removeDependency( Version dependency )
    {
        if( dependency == null )
        {
            return;
        }
        dependsOn.forEach( ( Version version ) ->
        {
            if( dependency.equals( version ) )
            {
                dependsOn.remove( version );
                return;
            }
        } );
    }
}

我删除 addDependency 和 removeDependency 后，EclipseLink 再次完美运行。也不是字段usedIn，我已经尝试删除它了。我正在使用 EclipseLink 2.5 作为持久性 api。
有人知道我做错了什么吗？

更新
抛出以下异常

java.lang.IllegalArgumentException: Object: Version [id=null, 

name=1.2.5] is not a known entity type.
    at org.eclipse.persistence.internal.sessions.UnitOfWorkImpl.registerNewObjectForPersist(UnitOfWorkImpl.java:4222)
    at org.eclipse.persistence.internal.jpa.EntityManagerImpl.persist(EntityManagerImpl.java:496)
    at persistence.VersionTest.setUp(VersionTest.java:71)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:483)
    at org.junit.runners.model.FrameworkMethod.runReflectiveCall(FrameworkMethod.java:47)
    at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
    at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:44)
    at org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:24)
    at org.junit.internal.runners.statements.RunAfters.evaluate(RunAfters.java:27)
    at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:271)
    at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:70)
    at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:50)
    at org.junit.runners.ParentRunner.run(ParentRunner.java:238)
    at org.junit.runners.ParentRunner.schedule(ParentRunner.java:63)
    at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:236)
    at org.junit.runners.ParentRunner.access[=11=]0(ParentRunner.java:53)
    at org.junit.runners.ParentRunner.evaluate(ParentRunner.java:229)
    at org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:26)
    at org.junit.internal.runners.statements.RunAfters.evaluate(RunAfters.java:27)
    at org.junit.runners.ParentRunner.run(ParentRunner.java:309)
    at org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:50)
    at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38)
    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:459)
    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:675)
    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:382)
    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:192)

第 71 行是 JUnit 测试中设置的一部分：

@Before
public void setUp() throws Exception
{
    Version version1 = new Version();
    version1.setName( versionName1 );

    Version version2 = new Version();
    version2.setName( versionName2 );

    EntityTransaction transaction = manager.getTransaction();
    try
    {
        transaction.begin();
        manager.persist( lVersion1 ); //line 71
        //...

Answer 1

如果您想在您的实体代码中使用 Java 8 lambda，您应该有一个与 Java 8 字节码兼容的最新版本的 EclipseLink，否则您可能运行陷入冲突。使用 EclipseLink 版本 2.6.0 或更高版本。

问题的根源可以在这个错误报告中找到，它在 2.6.0 中得到解决：

https://bugs.eclipse.org/bugs/show_bug.cgi?id=429992

无法识别 Eclipselink 实体

Eclipselink Entity is not recognized

java

persistence

eclipselink