How can I know if a Class is mapped as a Hibernate entity?

I have an Object. Ho开发者_JS百科w can I know if its class is mapped to a table in Hibernate?

EDIT: My original answer works but will initialise unitialised proxies, which may be undesirable.

Better solution

boolean isHibernateEntity = sessionFactory.getClassMetadata( HibernateProxyHelper.getClassWithoutInitializingProxy( yourObject ) ) != null;

Original answer:

boolean isHibernateEntity = sessionFactory.getClassMetdata( Hibernate.getClass( yourObject ) ) != null;

This way you can get all entities managed by Hibernate: sessionFactory.getMetamodel(). So to sum up:

boolean isHibernateEntity(Object obj) {
    Class<?> cl = HibernateProxyHelper.getClassWithoutInitializingProxy(obj);
    for (EntityType<?> entity : sessionFactory.getMetamodel().getEntities())
        if (entity.getJavaType().equals(cl))
            return true;
    return false;    
}

Now you can identify if a class is an entity or not by javax.persistence.metamodel.Metamodel from JPA 2.0. Or org.hibernate.Metamodel if you do not use JPA. Example:

public boolean isEntity(Class<?> clazz){
    Metamodel metamodel = entityManager.getMetamodel();
    try {
        metamodel.entity(clazz);
    } catch (IllegalArgumentException e) {
        // NOTE: the exception means the class is NOT an entity. There is no reason to log it.
        return false;
    }
    return true;
}

And here without sessionFactory :

private boolean isEntityClass(Object o){
    if(o != null){
        Type[] interfaces = o.getClass().getGenericInterfaces();
        for(Type interf : interfaces)
            if(interf.equals(HibernateProxy.class))
                return true;
    }
    return false;
}