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Function.java

// $Id: Function.java,v 1.2 2001/12/07 11:41:24 ramsdell Exp $

// The function interface.  All functions must implement this interface.

/*
 * Copyright 1999 by John D. Ramsdell
 *
 * 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.
 */

package edu.neu.ccs.jmk;

/**
 * The function interface.
 * All functions must implement this interface.
 * @version May 1999
 * @author John D. Ramsdell
 */
00031 public interface Function
extends Value
{
  /**
   * Get the name of a function.
   * @return the name for printing
   */
  String getName();

  /**
   * Invoke this function.
   * @param args parameters to the function
   * @param list a string list
   * @return result of invocation appended to the list
   * (if list is non-null, result must be a string list)
   * @exception Exception if invocation failed
   */
  Value invoke(Value[] args, StringList list) throws Exception;
}

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