package org.gudy.azureus2.core3.predicate;
/*
* Created on 5-Mar-2005
* Created by James Yeh
* Copyright (C) 2004-2005 Aelitis, All Rights Reserved.
*
* 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; either version 2
* 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 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.
*
* AELITIS, SAS au capital de 46,603.30 euros
* 8 Allee Lenotre, La Grille Royale, 78600 Le Mesnil le Roi, France.
*
*/
/**
* MutableCompositePredicate decorates existing composite Predicates to support
* add and removal operations.
* @version 1.0
* @author James Yeh
*/
public interface MutableCompositePredicate
{
/**
* <p>
* Adds a predicate to the list of evaluations the composite predicate contains
* </p>
* <p>
* If the predicate already exists in the list, it is not added.
* </p>
* @param aPredicate A predicate
* @return False if the predicate already exists in the list
*/
public boolean addPredicate(Predicable aPredicate);
/**
* Removes a predicate from the list of evaluations the composite predicate contains
* @param aPredicate A predicate
* @return The predicate that was removed; null if the predicate was not found
*/
public Predicable removePredicate(Predicable aPredicate);
}