org.hibernate.persister.walking.spi.AssociationKey Maven / Gradle / Ivy
/*
* Hibernate, Relational Persistence for Idiomatic Java
*
* Copyright (c) 2013, Red Hat Inc. or third-party contributors as
* indicated by the @author tags or express copyright attribution
* statements applied by the authors. All third-party contributions are
* distributed under license by Red Hat Inc.
*
* This copyrighted material is made available to anyone wishing to use, modify,
* copy, or redistribute it subject to the terms and conditions of the GNU
* Lesser General Public License, as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License
* for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this distribution; if not, write to:
* Free Software Foundation, Inc.
* 51 Franklin Street, Fifth Floor
* Boston, MA 02110-1301 USA
*/
package org.hibernate.persister.walking.spi;
import java.util.Arrays;
/**
* Used to uniquely identify a foreign key, so that we don't join it more than once creating circularities.
*
* 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
*/
public class AssociationKey {
private final String table;
private final String[] columns;
public AssociationKey(String table, String[] columns) {
this.table = table;
this.columns = columns;
}
@Override
public boolean equals(Object other) {
AssociationKey that = (AssociationKey) other;
return that.table.equals(table) && Arrays.equals( columns, that.columns );
}
@Override
public int hashCode() {
return table.hashCode(); //TODO: inefficient
}
}