org.ujorm.orm

Interface ExtendedOrmUjo<U extends ExtendedOrmUjo>

All Superinterfaces:

OrmUjo, org.ujorm.Ujo

All Known Implementing Classes:

OrmTable, OrmTableLockable, OrmTableSynchronized

public interface ExtendedOrmUjo<U extends ExtendedOrmUjo>
extends OrmUjo

Extended ORM Ujo. Interface methods are not necessary to run the ORM.

Method Summary

Modifier and Type	Method and Description
<UJO extends U> ForeignKey	readFK(org.ujorm.Key<UJO,? extends OrmUjo> key) Read the foreign key.

Methods inherited from interface org.ujorm.orm.OrmUjo

readChangedProperties, readSession, writeSession

Methods inherited from interface org.ujorm.Ujo

readAuthorization, readKeys, readValue, writeValue

Method Detail

readFK

<UJO extends U> ForeignKey readFK(org.ujorm.Key<UJO,? extends OrmUjo> key)
                           throws IllegalStateException

Read the foreign key. This is useful to obtain the foreign key value without (lazy) loading the entire object. If the lazy object is loaded, the method will need the Session to build the ForeignKey instance.
NOTE: The method is designed for developers only, the Ujorm doesn't call it newer.

Returns:

If no related object is available, then the result has the NULL value.

Throws:

IllegalStateException - Method throws an exception for a wrong key type.

NullPointerException - Method throws an exception if a Session is missing after a lazy initialization of the key.