org.hibernate.envers.entities.mapper.PersistentCollectionChangeData Maven / Gradle / Ivy
/*
* Hibernate, Relational Persistence for Idiomatic Java
*
* Copyright (c) 2008, Red Hat Middleware LLC 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 Middleware LLC.
*
* 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.envers.entities.mapper;
import java.util.Map;
import org.hibernate.envers.tools.Pair;
/**
* Data describing the change of a single object in a persistent collection (when the object was added, removed or
* modified in the collection).
* @author Adam Warski (adam at warski dot org)
*/
public class PersistentCollectionChangeData {
private final String entityName;
private final Map data;
private final Object changedElement;
public PersistentCollectionChangeData(String entityName, Map data, Object changedElement) {
this.entityName = entityName;
this.data = data;
this.changedElement = changedElement;
}
/**
*
* @return Name of the (middle) entity that holds the collection data.
*/
public String getEntityName() {
return entityName;
}
public Map getData() {
return data;
}
/**
* @return The affected element, which was changed (added, removed, modified) in the collection.
*/
public Object getChangedElement() {
if (changedElement instanceof Pair) {
return ((Pair) changedElement).getSecond();
}
if (changedElement instanceof Map.Entry) {
return ((Map.Entry) changedElement).getValue();
}
return changedElement;
}
/**
* @return Index of the affected element, or {@code null} if the collection isn't indexed.
*/
public Object getChangedElementIndex() {
if (changedElement instanceof Pair) {
return ((Pair) changedElement).getFirst();
}
if (changedElement instanceof Map.Entry) {
return ((Map.Entry) changedElement).getKey();
}
return null;
}
}