/*
 *  Copyright 2006-2008 Mikhail Kryshen
 *
 *  This file is part of Tema.
 *
 *  Tema 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 3 of the
 *  License, or (at your option) any later version.
 *
 *  Tema 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 Tema.  
 *  If not, see <http://www.gnu.org/licenses/>.
 *
 *  $Id: Function.java,v 1.13 2008/02/19 16:21:00 mikhail Exp $
 */

package kryshen.tema;

import java.io.IOException;
import java.io.Writer;

/**
 * Abstact class for Tema functions.
 *
 * @author Mikhail Kryshen
 */
public abstract class Function {

    /**
     * Invoke the function.
     *
     * @param fdp FunctionDataParser to access function arguments.
     * @param out Writer for the function output.
     */
    public abstract int invoke(FunctionDataParser fdp, Writer out)
        throws IOException, TemplateException;
}