/*
 *  eXist Open Source Native XML Database
 *  Copyright (C) 2001-09 Wolfgang M. Meier
 *  wolfgang@exist-db.org
 *  http://exist.sourceforge.net
 *  
 *  This program is free software; you can redistribute it and/or
 *  modify it under the terms of the GNU Lesser 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 Lesser General Public License for more details.
 *  
 *  You should have received a copy of the GNU Lesser General Public License
 *  along with this program; if not, write to the Free Software
 *  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 *  
 *  $Id$
 */
package org.exist.xquery.modules.httpclient;

import org.apache.log4j.Logger;
import org.exist.dom.QName;
import org.exist.xquery.Cardinality;
import org.exist.xquery.FunctionSignature;
import org.exist.xquery.XPathException;
import org.exist.xquery.XQueryContext;
import org.exist.xquery.value.Sequence;
import org.exist.xquery.value.SequenceType;
import org.exist.xquery.value.Type;

/**
 * @author Adam Retter <adam.retter@devon.gov.uk>
 * @author Andrzej Taramina <andrzej@chaeron.com>
 * @serial 20070905
 * @version 1.2
 */

public class ClearPersistentCookiesFunction extends BaseHTTPClientFunction {
    
	protected static final Logger logger = Logger.getLogger(ClearPersistentCookiesFunction.class);

	public final static FunctionSignature signature =
        new FunctionSignature(
        new QName( "clear-persistent-cookies", NAMESPACE_URI, PREFIX ),
        "Clears any persistent cookies stored in the current session on the client.",
        null,
        new SequenceType( Type.ITEM, Cardinality.EMPTY )
        );
    
    public ClearPersistentCookiesFunction(XQueryContext context)
    {
        super( context, signature );
    }
    
    public Sequence eval( Sequence[] args, Sequence contextSequence ) throws XPathException
    {
        context.setXQueryContextVar( HTTP_MODULE_PERSISTENT_COOKIES, null );
        return( Sequence.EMPTY_SEQUENCE );
    }
    
}