org.ujorm.orm
Interface OrmUjo

All Superinterfaces:

Ujo

All Known Subinterfaces:

ExtendedOrmUjo<UJO_IMPL>

All Known Implementing Classes:

OrmTable, OrmTableSynchronized

public interface OrmUjo
extends Ujo

The OrmUjo is a basic interface of the persistent object in the ORM support. A class that implements the interface must have got a next special features:

• exactly one Key must be identified as the primary key.
• A Key for a relation type of many-to-one (for lazy lodading) must be an instance of OrmKey
• reference to a foreign BO must be able to store an object of any type by the method Ujo.writeProperty(...). This feature is necessary for the proper functioning of the lazy initialization
• relation many to one can be mapped by a RelationToMany property
• each table OrmUjo must be registered in the Database by a property type of RelationToMany

Author:

Ponec

See Also:

OrmKeyFactory, OrmKey, RelationToMany

Method Summary

Key[]	readChangedProperties(boolean clear) Returns keys of changed values in time of not null session.
Session	readSession() Read an ORM session where the session is an transient property.
void	writeSession(Session session) Write an ORM session.

Methods inherited from interface org.ujorm.Ujo

readAuthorization, readKeys, readProperties, readValue, writeValue

Method Detail

readSession

Session readSession()

Read an ORM session where the session is an transient property.

writeSession

void writeSession(Session session)

Write an ORM session.

readChangedProperties

Key[] readChangedProperties(boolean clear)

Returns keys of changed values in time of not null session. The method is userful to a SQL UPDATE statement to manage only assigned values. Implementation tip: create a new property type of Set and in the method writeValue assing the current Key allways.

Parameters:

clear - True value clears all the property changes.

Returns:

Key array of the modified values.