org.sqlproc.engine.impl
Class SqlMappingIdentity

java.lang.Object
  org.sqlproc.engine.impl.SqlMappingIdentity

 class SqlMappingIdentity
extends Object

The identity related to one output attribute. To be more precise, it's related to one SqlMappingAttribute. For the purpose of correct left join handling, the identities are identified. They are used to prevent the repeated rows in the output result set. This is used for the associations (one-to-one, one-to-many and many-to-many).

Author:

Vladimir Hudec

Field Summary

(package private) Integer	idenityDistance The distance from the identity column.
(package private) List<Integer>	identityIndexes The list of all alternative identities.
(package private) SqlMappingItem	item The related mapping rule element for one output attribute.
(package private) SqlMappingAttribute	itemAttribute The related mapping rule sub-element for one output attribute.

Constructor Summary

SqlMappingIdentity(SqlMappingItem item)
Creates a new instance.

SqlMappingIdentity(SqlMappingItem item, SqlMappingAttribute itemAttribute)
Creates a new instance.

Method Summary

(package private) void	addIdentityIndex(Integer identityIndex, boolean reset) Adds a new identity index.
String	toString() For debug purposes.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Field Detail

identityIndexes

List<Integer> identityIndexes

The list of all alternative identities. More identities happen in the case of the result classes inheritance. This version of SQL Processor supports table per subclass (represent is a (inheritance) relationships as has a (foreign key) relationships).

idenityDistance

Integer idenityDistance

The distance from the identity column.

item

SqlMappingItem item

The related mapping rule element for one output attribute.

itemAttribute

SqlMappingAttribute itemAttribute

The related mapping rule sub-element for one output attribute.

Constructor Detail

SqlMappingIdentity

SqlMappingIdentity(SqlMappingItem item)

Creates a new instance.

Parameters:

item - the related mapping rule element

SqlMappingIdentity

SqlMappingIdentity(SqlMappingItem item,
                   SqlMappingAttribute itemAttribute)

Creates a new instance.

Parameters:

item - the related mapping rule element

itemAttribute - the related mapping rule sub-element

Method Detail

addIdentityIndex

void addIdentityIndex(Integer identityIndex,
                      boolean reset)

Adds a new identity index.

Parameters:

identityIndex - a new identity index

reset - an indicator this is the only identity index

toString

public String toString()

For debug purposes.

Overrides:

toString in class Object

Returns:

a String representation for a debug output