Function.java

/*
 * 	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 3 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.
 */
package com.meidusa.amoeba.parser.function;

import java.util.List;

import com.meidusa.amoeba.parser.expression.Expression;
import com.meidusa.amoeba.sqljep.ParseException;

/**
 * ����Function�����
 * @author <a href=mailto:piratebase@sina.com>Struct chen</a>
 *
 */
public interface Function{
	
	@SuppressWarnings("unchecked")
	Comparable evaluate(List<Expression> list,Object[] parameters) throws ParseException;
	
	/**
	 * ��ú�������
	 * @return
	 */
	public String getName();
	
	/**
	 * ���ú�������
	 * @param name
	 */
	public void setName(String name);
	
	void toString(List<Expression> list,StringBuilder builder);
}