/*
* The contents of this file are subject to the Mozilla Public License
* Version 1.1 (the "License"); you may not use this file except in
* compliance with the License. You may obtain a copy of the License at
* http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS"
* basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
* the License for the specific language governing rights and limitations
* under the License.
*
* The Original Code is the Kowari Metadata Store.
*
* The Initial Developer of the Original Code is Plugged In Software Pty
* Ltd (http://www.pisoftware.com, mailto:info@pisoftware.com). Portions
* created by Plugged In Software Pty Ltd are Copyright (C) 2001,2002
* Plugged In Software Pty Ltd. All Rights Reserved.
*
* Contributor(s):
* getModel() contributed by Netymon Pty Ltd on behalf of
* The Australian Commonwealth Government under contract 4500507038.
*
* [NOTE: The text of this Exhibit A may differ slightly from the text
* of the notices in the Source Code files of the Original Code. You
* should use the text of this Exhibit A rather than the text found in the
* Original Code Source Code for Your Modifications.]
*
*/
package org.mulgara.query;
/**
* A variable and its ordering, for composing <code>ORDER BY</code> clauses.
*
* @created 2002-02-28
*
* @author <a href="http://staff.pisoftware.com/david">David Makepeace</a>
* @author <a href="http://staff.pisoftware.com/pag">Paula Gearon</a>
*
* @version $Revision: 1.8 $
*
* @modified $Date: 2005/01/05 04:58:20 $ by $Author: newmana $
*
* @maintenanceAuthor $Author: newmana $
*
* @copyright ©2001-2004
* <a href="http://www.pisoftware.com/">Plugged In Software Pty Ltd</a>
*
* @licence <a href="{@docRoot}/../../LICENCE">Mozilla Public License v1.1</a>
*/
public interface Constraint extends ConstraintExpression {
/**
* Allow newer compiled version of the stub to operate when changes
* have not occurred with the class.l
* NOTE : update this serialVersionUID when a method or a public member is
* deleted.
*/
static final long serialVersionUID = 8168059073438682618L;
/**
* Get a constraint element by index.
*
* @param index The constraint element to retrieve, from 0 to 3.
* @return The constraint element referred to by index.
*/
public ConstraintElement getElement(int index);
/**
* Get the model element of this constraint.
*/
public ConstraintElement getModel();
/**
* Returns true if there is are repeating constraint elements.
*
* For example, <code>$s $p $s</code>.
*
* @return true if there is are repeating constraint elements
*/
public boolean isRepeating();
}