001 /**
002 * =========================================
003 * LibFormula : a free Java formula library
004 * =========================================
005 *
006 * Project Info: http://reporting.pentaho.org/libformula/
007 *
008 * (C) Copyright 2006-2007, by Pentaho Corporation and Contributors.
009 *
010 * This library is free software; you can redistribute it and/or modify it under the terms
011 * of the GNU Lesser General Public License as published by the Free Software Foundation;
012 * either version 2.1 of the License, or (at your option) any later version.
013 *
014 * This library is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
015 * without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
016 * See the GNU Lesser General Public License for more details.
017 *
018 * You should have received a copy of the GNU Lesser General Public License along with this
019 * library; if not, write to the Free Software Foundation, Inc., 59 Temple Place, Suite 330,
020 * Boston, MA 02111-1307, USA.
021 *
022 * [Java is a trademark or registered trademark of Sun Microsystems, Inc.
023 * in the United States and other countries.]
024 *
025 *
026 * ------------
027 * $Id: ParameterCallback.java 2716 2007-04-01 13:51:58Z taqua $
028 * ------------
029 * (C) Copyright 2006-2007, by Pentaho Corporation.
030 */
031
032 package org.jfree.formula.function;
033
034 import org.jfree.formula.typing.Type;
035 import org.jfree.formula.EvaluationException;
036 import org.jfree.formula.lvalues.LValue;
037
038 /**
039 * Creation-Date: 13.11.2006, 13:52:21
040 *
041 * @author Thomas Morgner
042 */
043 public interface ParameterCallback
044 {
045 public LValue getRaw (int position);
046 public Object getValue (int position) throws EvaluationException;
047 public Type getType (int position) throws EvaluationException;
048 public int getParameterCount();
049 }