org.hibernate.engine.spi.AssociationKey Maven / Gradle / Ivy
/*
* Hibernate, Relational Persistence for Idiomatic Java
*
* Copyright (c) 2008-2011, 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.engine.spi;
import java.io.Serializable;
/**
* Identifies a named association belonging to a particular
* entity instance. Used to record the fact that an association
* is null during loading.
*
* @author Gavin King
*/
public final class AssociationKey implements Serializable {
private EntityKey ownerKey;
private String propertyName;
/**
* Constructs an AssociationKey
*
* @param ownerKey The EntityKey of the association owner
* @param propertyName The name of the property on the owner which defines the association
*/
public AssociationKey(EntityKey ownerKey, String propertyName) {
this.ownerKey = ownerKey;
this.propertyName = propertyName;
}
@Override
public boolean equals(Object o) {
if ( this == o ) {
return true;
}
if ( o == null || getClass() != o.getClass() ) {
return false;
}
final AssociationKey that = (AssociationKey) o;
return ownerKey.equals( that.ownerKey )
&& propertyName.equals( that.propertyName );
}
@Override
public int hashCode() {
int result = ownerKey.hashCode();
result = 31 * result + propertyName.hashCode();
return result;
}
}