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: TimeFunction.java 3522 2007-10-16 10:56:57Z tmorgner $ 028 * ------------ 029 * (C) Copyright 2006-2007, by Pentaho Corporation. 030 */ 031 package org.jfree.formula.function.datetime; 032 033 import java.sql.Time; 034 035 import org.jfree.formula.EvaluationException; 036 import org.jfree.formula.FormulaContext; 037 import org.jfree.formula.LibFormulaErrorValue; 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.TypeRegistry; 043 import org.jfree.formula.typing.coretypes.DateTimeType; 044 import org.jfree.formula.util.DateUtil; 045 046 /** 047 * This fonction constructs a time from hours, minutes, and seconds. 048 * 049 * @author Cedric Pronzato 050 */ 051 public class TimeFunction implements Function 052 { 053 public TimeFunction() 054 { 055 } 056 057 public String getCanonicalName() 058 { 059 return "TIME"; 060 } 061 062 public TypeValuePair evaluate(final FormulaContext context, 063 final ParameterCallback parameters) throws EvaluationException 064 { 065 if (parameters.getParameterCount() != 3) 066 { 067 throw new EvaluationException(LibFormulaErrorValue.ERROR_ARGUMENTS_VALUE); 068 } 069 final Number n1; 070 final Number n2; 071 final Number n3; 072 try 073 { 074 final TypeRegistry typeRegistry = context.getTypeRegistry(); 075 n1 = typeRegistry.convertToNumber(parameters.getType(0), parameters 076 .getValue(0)); 077 n2 = typeRegistry.convertToNumber(parameters.getType(1), parameters 078 .getValue(1)); 079 n3 = typeRegistry.convertToNumber(parameters.getType(2), parameters 080 .getValue(2)); 081 } catch (NumberFormatException e) 082 { 083 throw new EvaluationException( 084 LibFormulaErrorValue.ERROR_INVALID_ARGUMENT_VALUE); 085 } 086 087 if (n1 == null || n2 == null || n3 == null) 088 { 089 throw new EvaluationException( 090 LibFormulaErrorValue.ERROR_INVALID_ARGUMENT_VALUE); 091 } 092 final int hours = n1.intValue(); 093 final int minutes = n2.intValue(); 094 final int seconds = n3.intValue(); 095 096 final LocalizationContext localizationContext = context 097 .getLocalizationContext(); 098 final Time time = DateUtil.createTime(hours, minutes, seconds, 099 localizationContext); 100 101 return new TypeValuePair(DateTimeType.TIME_TYPE, time); 102 } 103 }