com.db4o.ext.ExtObjectSet Maven / Gradle / Ivy
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/* Copyright (C) 2004 - 2005 db4objects Inc. http://www.db4o.com
This file is part of the db4o open source object database.
db4o is free software; you can redistribute it and/or modify it under
the terms of version 2 of the GNU General Public License as published
by the Free Software Foundation and as clarified by db4objects' GPL
interpretation policy, available at
http://www.db4o.com/about/company/legalpolicies/gplinterpretation/
Alternatively you can write to db4objects, Inc., 1900 S Norfolk Street,
Suite 350, San Mateo, CA 94403, USA.
db4o 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 General Public License
for more details.
You should have received a copy of the GNU General Public License along
with this program; if not, write to the Free Software Foundation, Inc.,
59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
package com.db4o.ext;
import com.db4o.*;
/**
* extended functionality for the
* {@link ObjectSet ObjectSet} interface.
*
Every db4o {@link ObjectSet ObjectSet}
* always is an ExtObjectSet so a cast is possible.
* {@link ObjectSet#ext}
* is a convenient method to perform the cast.
* The ObjectSet functionality is split to two interfaces to allow newcomers to
* focus on the essential methods.
*/
public interface ExtObjectSet extends ObjectSet {
/**
* returns an array of internal IDs that correspond to the contained objects.
*
* @see ExtObjectContainer#getID
* @see ExtObjectContainer#getByID
*/
public long[] getIDs();
/**
* returns the item at position [index] in this ObjectSet.
*
* The object will be activated.
* @param index the index position in this ObjectSet.
* @return the activated object.
*/
public Object get(int index);
// public void sort(QueryComparator cmp);
}