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: NowFunction.java 2847 2007-05-21 18:57:59Z mimil $ 028 * ------------ 029 * (C) Copyright 2006-2007, by Pentaho Corporation. 030 */ 031 032 package org.jfree.formula.function.datetime; 033 034 import java.util.Date; 035 036 import org.jfree.formula.EvaluationException; 037 import org.jfree.formula.FormulaContext; 038 import org.jfree.formula.LocalizationContext; 039 import org.jfree.formula.function.Function; 040 import org.jfree.formula.function.ParameterCallback; 041 import org.jfree.formula.lvalues.TypeValuePair; 042 import org.jfree.formula.typing.coretypes.DateTimeType; 043 import org.jfree.formula.util.DateUtil; 044 045 /** 046 * Return the serial number of the current date and time. This returns the current day and time serial number, using the 047 * current locale. If you want only the serial number of the current day, use TODAY. 048 * 049 * @author Thomas Morgner 050 * @since 23.03.2007 051 */ 052 public class NowFunction implements Function 053 { 054 public NowFunction() 055 { 056 } 057 058 public String getCanonicalName() 059 { 060 return "NOW"; 061 } 062 063 public TypeValuePair evaluate(final FormulaContext context, 064 final ParameterCallback parameters) 065 throws EvaluationException 066 { 067 final LocalizationContext localizationContext = context.getLocalizationContext(); 068 final Date now = DateUtil.now(localizationContext); 069 070 final Date date = DateUtil.normalizeDate(now, DateTimeType.DATETIME_TYPE); 071 return new TypeValuePair(DateTimeType.DATETIME_TYPE, date); 072 } 073 }