org.ujorm.orm

Interface OrmUjo

All Superinterfaces:

org.ujorm.Ujo

All Known Subinterfaces:

ColumnSet, ExtendedOrmUjo<U>

All Known Implementing Classes:

OrmTable, OrmTableLockable, OrmTableSynchronized

public interface OrmUjo
extends org.ujorm.Ujo

The OrmUjo is a basic interface of the persistent object in the ORM support. The class can be Serializable. 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 key
• each table OrmUjo must be registered in the Database by a key type of RelationToMany

See Also:

OrmKeyFactory, OrmKey, RelationToMany

Method Summary

Modifier and Type	Method and Description
org.ujorm.Key[]	readChangedProperties(boolean clear) Returns keys of changed values in a time when any session is assigned.
Session	readSession() Read an ORM session where the session is an transient key.
void	writeSession(Session session) Write an ORM session.

Methods inherited from interface org.ujorm.Ujo

readAuthorization, readKeys, readValue, writeValue

Method Detail

readSession

Session readSession()

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

writeSession

void writeSession(Session session)

Write an ORM session.

readChangedProperties

org.ujorm.Key[] readChangedProperties(boolean clear)

Returns keys of changed values in a time when any session is assigned. The method is used by a SQL UPDATE statement to update assigned values only. Implementation tip: create a new key type of Set and in the method writeValue assign the current Key always.

Parameters:

clear - True value clears all the key changes.

Returns:

Key array of the modified values.