Возможно ли, чтобы JPA embeddable содержал Embeddable или коллекцию Embeddables?

я задаюсь вопросом, возможно ли иметь ElementCollection встраиваемого внутри другого встраиваемого ?

вот пример моей сущности поставщика, которая имеет список адресов, который имеет встраиваемый тип:

@Entity
public class Supplier extends BaseCommonEntity {
    @Column(unique=true)
    private String supplierCode;    

    private String supplierName;

    @ElementCollection
    private List<Address> addresses;
....

и вот мой встраиваемый адрес, который содержит список встраиваемых телефонов

@Embeddable
public class Address {
    private String address;
    private String city;
    private String country;
    private String postcode;

    @ElementCollection
    private List<Phone> phones;
    public List<Phone> getPhones() {
        return phones;
    }

    public void setPhones(List<Phone> phones) {
        this.phones = phones;
    }
...

и вот встроенное определение телефона

@Embeddable
public class Phone {
    private Long phoneCountryCode;
    private Long phoneCityCode;
    private Long phoneNo;
    private Long faxCountryCode;
    private Long faxCityCode;
    private Long faxNo;
...

Im в настоящее время тестирует это с JPA 2 + Спящий режим 3.6.x

использование встроенного телефона внутри адреса приводит к ошибке в моем тесте. Вот частичные отладочные сообщения из самого низа:

DEBUG PropertyBinder - Building property country
DEBUG Ejb3Column - Binding column: Ejb3JoinColumn{logicalColumnName='null', referencedColumn='null', mappedBy=''}
DEBUG Ejb3Column - Binding column: Ejb3Column{table=org.hibernate.mapping.Table(Supplier_addresses), mappingColumn=phones, insertable=true, updatable=true, unique=false}
DEBUG Ejb3Column - Binding column: Ejb3Column{table=org.hibernate.mapping.Table(Supplier_addresses), mappingColumn=null, insertable=true, updatable=true, unique=false}
DEBUG Ejb3Column - Binding column: Ejb3Column{table=org.hibernate.mapping.Table(Supplier_addresses), mappingColumn=phones, insertable=true, updatable=true, unique=false}
DEBUG Ejb3Column - Binding column: Ejb3Column{table=org.hibernate.mapping.Table(Supplier_addresses), mappingColumn=phones_KEY, insertable=true, updatable=true, unique=false}
DEBUG Ejb3Column - Binding column: Ejb3JoinColumn{logicalColumnName='phones_KEY', referencedColumn='null', mappedBy='null'}
DEBUG Ejb3Column - Binding column: Ejb3JoinColumn{logicalColumnName='null', referencedColumn='null', mappedBy=''}
DEBUG Ejb3Column - Binding column: Ejb3JoinColumn{logicalColumnName='null', referencedColumn='null', mappedBy=''}
DEBUG CollectionBinder - Collection role: com.primetech.core.entity.Supplier.addresses.collection&&element.phones
DEBUG PropertyBinder - Building property phones
DEBUG Ejb3Column - Binding column: Ejb3Column{table=org.hibernate.mapping.Table(Supplier_addresses), mappingColumn=postcode, insertable=true, updatable=true, unique=false}
DEBUG PropertyBinder - binding property postcode with lazy=false
DEBUG SimpleValueBinder - building SimpleValue for postcode
DEBUG SimpleValueBinder - Setting SimpleValue typeName for postcode
DEBUG PropertyBinder - Building property postcode
DEBUG CollectionSecondPass - Mapped collection key: Supplier_id, element: address, city, country, postcode
DEBUG DefaultListableBeanFactory - Retrieved dependent beans for bean 'org.springframework.orm.jpa.vendor.HibernateJpaVendorAdapter#102799c': [entityManagerFactory]
INFO  DefaultListableBeanFactory - Destroying singletons in org.springframework.beans.factory.support.DefaultListableBeanFactory@f6ac0b: defining beans [dataSource,entityManagerFactory,testEntities,org.springframework.context.annotation.internalConfigurationAnnotationProcessor,org.springframework.context.annotation.internalAutowiredAnnotationProcessor,org.springframework.context.annotation.internalRequiredAnnotationProcessor,org.springframework.context.annotation.internalCommonAnnotationProcessor,org.springframework.context.annotation.internalPersistenceAnnotationProcessor,transactionManager,org.springframework.aop.config.internalAutoProxyCreator,org.springframework.transaction.annotation.AnnotationTransactionAttributeSource#0,org.springframework.transaction.interceptor.TransactionInterceptor#0,org.springframework.transaction.config.internalTransactionAdvisor]; root of factory hierarchy
Exception in thread "main" org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'entityManagerFactory' defined in class path resource [test.xml]: Invocation of init method failed; nested exception is java.util.ConcurrentModificationException
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1412)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:519)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:456)
    at org.springframework.beans.factory.support.AbstractBeanFactory.getObject(AbstractBeanFactory.java:291)
    at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:222)
    at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:288)
    at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:190)
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:557)
    at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:895)
    at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:425)
    at org.springframework.context.support.ClassPathXmlApplicationContext.<init>(ClassPathXmlApplicationContext.java:139)
    at org.springframework.context.support.ClassPathXmlApplicationContext.<init>(ClassPathXmlApplicationContext.java:93)
    at com.primetech.module.purchase.app.TestEntities.main(TestEntities.java:27)
Caused by: java.util.ConcurrentModificationException
    at java.util.AbstractList$Itr.checkForComodification(AbstractList.java:372)
    at java.util.AbstractList$Itr.remove(AbstractList.java:357)
    at org.hibernate.cfg.Configuration.originalSecondPassCompile(Configuration.java:1687)
    at org.hibernate.cfg.Configuration.secondPassCompile(Configuration.java:1393)
    at org.hibernate.cfg.Configuration.buildMappings(Configuration.java:1345)
    at org.hibernate.ejb.Ejb3Configuration.buildMappings(Ejb3Configuration.java:1477)
    at org.hibernate.ejb.EventListenerConfigurator.configure(EventListenerConfigurator.java:193)
    at org.hibernate.ejb.Ejb3Configuration.configure(Ejb3Configuration.java:1096)
    at org.hibernate.ejb.Ejb3Configuration.configure(Ejb3Configuration.java:685)
    at org.hibernate.ejb.HibernatePersistence.createContainerEntityManagerFactory(HibernatePersistence.java:73)
    at org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean.createNativeEntityManagerFactory(LocalContainerEntityManagerFactoryBean.java:225)
    at org.springframework.orm.jpa.AbstractEntityManagerFactoryBean.afterPropertiesSet(AbstractEntityManagerFactoryBean.java:308)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.invokeInitMethods(AbstractAutowireCapableBeanFactory.java:1469)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1409)
    ... 12 more

удаление этой части решает проблему

    /**** REMOVE ALL OF THIS FROM THE CODE TO SOLVE THE PROBLEM ****/
    @ElementCollection
    private List<Phone> phones;
    public List<Phone> getPhones() {
        return phones;
    }

    public void setPhones(List<Phone> phones) {
        this.phones = phones;
    }

пожалуйста, поделитесь своими мыслями !

спасибо !