/*
 * Copyright (C) 1999-2006 <a href="mailto:paschke@in.tum.de">Adrian Paschke</a>
 * 
 * The ECA Interpreter is part of the Rule Based Service Level Agreement (RBSLA)
 * framework, available at 
 * <a href=" http://ibis.in.tum.de/staff/paschke/rbsla/index.htm">RBSLA</a>
 * 
 * This library 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 library 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 library; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */
package rbsla.eca;

import java.util.Map;

import rbsla.wrapper.KnowledgeBaseWrapper;
import org.mandarax.kernel.ResultSet;


/**
 * Interface for  condition part of an ECA rule
 * 
 * @author <A HREF="mailto:paschke@in.tum.de">Adrian Paschke</A>
 * @version 0.1 <1 Sept 2005>
 * @since 0.1
 */
public interface Condition
{
	/**
     * Evaluate
     * @param wrapper a wrapper to query the rule engine
     * @return ResultSet
     */
	public abstract ResultSet evaluate(KnowledgeBaseWrapper wrapper);

    /**
     * XML serialization
     * @param intend tab space
     * @return XML String
     */
	public abstract String toXML(int intend);
	
	/**
	 * Clone 
	 * @return Condition
	 */
	public abstract Object clone();
	
	/**
	 * Replace the variables with the bound values
	 * @param vars Map of variable --> value bindings
	 */
	public abstract void replace(Map vars);
	
	
		
}

