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package de.lmu.ifi.dbs.elki.database.datastore;
/*
This file is part of ELKI:
Environment for Developing KDD-Applications Supported by Index-Structures
Copyright (C) 2015
Ludwig-Maximilians-Universität München
Lehr- und Forschungseinheit für Datenbanksysteme
ELKI Development Team
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU Affero General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
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 Affero General Public License for more details.
You should have received a copy of the GNU Affero General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
import de.lmu.ifi.dbs.elki.database.ids.DBIDUtil;
import de.lmu.ifi.dbs.elki.database.ids.DBIDs;
/**
* Encapsulates information describing changes, i.e. updates, insertions, and /
* or deletions in a {@link DataStore}, and used to notify all subscribed
* {@link DataStoreListener} of the change.
*
* @author Erich Schubert
*
* @see DataStore
* @see DataStoreListener
*/
public class DataStoreEvent {
/**
* Insertions.
*/
private DBIDs inserts;
/**
* Removals.
*/
private DBIDs removals;
/**
* Updates.
*/
private DBIDs updates;
/**
* Constructor.
*
* @param inserts Insertions
* @param removals Removals
* @param updates Updates
*/
public DataStoreEvent(DBIDs inserts, DBIDs removals, DBIDs updates) {
super();
this.inserts = inserts;
this.removals = inserts;
this.updates = inserts;
}
/**
* Insertion event.
*
* @param inserts Insertions
* @return Event
*/
public static DataStoreEvent insertionEvent(DBIDs inserts) {
return new DataStoreEvent(inserts, DBIDUtil.EMPTYDBIDS, DBIDUtil.EMPTYDBIDS);
}
/**
* Removal event.
*
* @param removals Removal
* @return Event
*/
public static DataStoreEvent removalEvent(DBIDs removals) {
return new DataStoreEvent(DBIDUtil.EMPTYDBIDS, removals, DBIDUtil.EMPTYDBIDS);
}
/**
* Update event.
*
* @param updates Updates
* @return Event
*/
public static DataStoreEvent updateEvent(DBIDs updates) {
return new DataStoreEvent(DBIDUtil.EMPTYDBIDS, DBIDUtil.EMPTYDBIDS, updates);
}
/**
* Get the inserted objects.
*
* @return Insertions
*/
public DBIDs getInserts() {
return inserts;
}
/**
* Get the removed objects.
*
* @return Removals
*/
public DBIDs getRemovals() {
return removals;
}
/**
* Get the updates objects.
*
* @return Updates
*/
public DBIDs getUpdates() {
return updates;
}
}
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