I would like to use an @Embeddable object in my Entity, but it must be an optional (nullable) property.
My entity looks like this (besides some other regular properties):
Code:
@Embeddable
private static class Fubar {
private String aap;
String getAap(){
return aap;
}
void setAap(String a) {
aap = a;
}
}
Fubar fu;
@Embedded
Fubar getFubar() {
return fu;
}
void setFubar(Fubar bar) {
fu = bar;
}
When I persist my entity after having set a Fubar instance, it works fine.
But when I try to persist my entity with the embeddable object = null, I'm getting a NullPointerException:
Quote:
java.lang.NullPointerException
at org.hibernate.property.BasicPropertyAccessor$BasicGetter.get(BasicPropertyAccessor.java:145)
at org.hibernate.tuple.component.AbstractComponentTuplizer.getPropertyValue(AbstractComponentTuplizer.java:64)
at org.hibernate.tuple.component.AbstractComponentTuplizer.getPropertyValues(AbstractComponentTuplizer.java:70)
at org.hibernate.tuple.component.PojoComponentTuplizer.getPropertyValues(PojoComponentTuplizer.java:86)
at org.hibernate.type.ComponentType.getPropertyValues(ComponentType.java:353)
at org.hibernate.type.ComponentType.getPropertyValues(ComponentType.java:348)
at org.hibernate.type.TypeFactory.replaceAssociations(TypeFactory.java:556)
at org.hibernate.event.def.DefaultMergeEventListener.copyValues(DefaultMergeEventListener.java:366)
at org.hibernate.event.def.DefaultMergeEventListener.entityIsTransient(DefaultMergeEventListener.java:195)
at org.hibernate.event.def.DefaultMergeEventListener.onMerge(DefaultMergeEventListener.java:123)
at org.hibernate.event.def.DefaultMergeEventListener.onMerge(DefaultMergeEventListener.java:53)
at org.hibernate.impl.SessionImpl.fireMerge(SessionImpl.java:677)
at org.hibernate.impl.SessionImpl.merge(SessionImpl.java:661)
at org.hibernate.impl.SessionImpl.merge(SessionImpl.java:665)
at org.hibernate.ejb.AbstractEntityManagerImpl.merge(AbstractEntityManagerImpl.java:228)
at org.springframework.orm.jpa.SharedEntityManagerCreator$SharedEntityManagerInvocationHandler.invoke(SharedEntityManagerCreator.java:193)
I can't really imagine that it's not allowed or possible to have an optional embedded property, or am I wrong?
How can I use an optional embedded property?
Cheers,
Tom
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