/** Copyright (C) SYSTAP, LLC DBA Blazegraph 2006-2016. All rights reserved. Contact: SYSTAP, LLC DBA Blazegraph 2501 Calvert ST NW #106 Washington, DC 20008 licenses@blazegraph.com This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; version 2 of the License. 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 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 */ /* * Created on Mar 22, 2012 */ package com.bigdata.gom.gpo; /** * An ordered link set. * * @author <a href="mailto:thompsonbry@users.sourceforge.net">Bryan Thompson</a> * @version $Id$ */ public interface IOrderedLinkSet extends ILinkSet { /** * {@inheritDoc} * <p> * This value is known directly to the link set and is available in O(1). */ public int size(); /** * {@inheritDoc} * <p> * This value is known directly to the link set and is available in O(1). */ public long size2(); /** * Returns the first member of the link set or <code>null</code> iff the * link set is empty. */ public IGPO getFirst(); /** * Returns the last member of the link set or <code>null</code> iff the link * set is empty. */ public IGPO getLast(); /** * Returns the next member of the link set or <code>null</code> iff * <i>member</i> is the last member of the link set. * * @param member * A member of the link set. * * @exception IllegalArgumentException * if <i>member</i> is <code>null</code> or otherwise not a * member of the link set. */ public IGPO getNext(IGPO member); /** * Returns the prior member of the link set or <code>null</code> iff * <i>member</i> is the first member of the link set. * * @param member * A member of the link set. * * @exception IllegalArgumentException * if <i>member</i> is <code>null</code> or otherwise not a * member of the link set. */ public IGPO getPrior(IGPO member); }