org.hibernate.persister.walking.spi

Class AssociationKey

java.lang.Object

org.hibernate.persister.walking.spi.AssociationKey

public class AssociationKey
extends Object

Used to uniquely identify a foreign key, so that we don't join it more than once creating circularities. Note that the table+columns refers to the association owner. These are used to help detect bi-directional associations since the Hibernate runtime metamodel (persisters) do not inherently know this information. For example, consider the Order -> Customer and Customer -> Order(s) bi-directional association; both would be mapped to the ORDER_TABLE.CUST_ID column. That is the purpose of this struct.

Bit of a misnomer to call this an association attribute. But this follows the legacy use of AssociationKey from old JoinWalkers to denote circular join detection

Author:

Steve Ebersole, Gail Badner, Gavin King

Constructor Summary

Constructors

Constructor and Description
AssociationKey(String table, String[] columns) Create the AssociationKey.

Method Summary

Modifier and Type	Method and Description
boolean	equals(Object o)
int	hashCode()
String	toString()

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Constructor Detail

AssociationKey

public AssociationKey(String table,
                      String[] columns)

Create the AssociationKey.

Parameters:

table - The table part of the association key

columns - The columns that define the association key

Method Detail

equals

public boolean equals(Object o)

Overrides:

equals in class Object

hashCode

public int hashCode()

Overrides:

hashCode in class Object

toString

public String toString()

Overrides:

toString in class Object