java - JPA OneToOne Lazy relation -

i have 2 entities: user , userprofile have bidirectional @onetoone relationship between them.
due old db design userprofile owner (i have column user_id in users_profiles table)
relationship lazy have fetchtype lazy , optional = false.
works expected, mean when load userprofile not automatically loads user also. guess normal load owner side.
problem if load user (owned side) loads automatically userprofile although relationship lazy.

i mean: normal when load entity owned side load owner entity ?

@entity @table(name = "users") public class user extends baseentity implements serializable {      @onetoone(mappedby = "user", optional=false, fetch = fetchtype.lazy)      private userprofile profile;     // .................rest of entity   }     @entity @table(name="users_profiles") public class userprofile extends baseentity implements serializable {      @onetoone(optional=false, fetch = fetchtype.lazy)     @joincolumn(name="user_id")     private user user;     // ... rest of entity here  } 

the way test loading user entity entitymanager method find(id).
have noticed when relation not lazy have 1 query join inside. if put current setup have 2 individual queries: 1 user , other 1 profile.

it important realize, lazy loading behavior not enforced jpa specification, recommended. hibernate implementation choose if supported , under conditions.

hibernate best load data lazily when requested, in case of one-to-one mapping, when relationship stored in table (the primary key in table users_profiles), needs query second table retrieve primary key create proxy object. in fact, not retrieve id, full row , creates userprofile in eager way, because costs nothing fetch additinal data when table needs joined in case.

the answer hibernate: one-to-one lazy loading, optional = false suggests making relationship non-optional should make lazy, doubt true. hibernate need create proxy without id, doubtfully correct in cases. 1 case fail when remove proxy object collection in parent entity, , try read data - proxy not carry enough information retrieve data lazily, not possible without connection parent entity.