/* * This program is free software; you can redistribute it and/or modify it under the * terms of the GNU Lesser General Public License, version 2.1 as published by the Free Software * Foundation. * * You should have received a copy of the GNU Lesser General Public License along with this * program; if not, you can obtain a copy at http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html * or from the Free Software Foundation, Inc., * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. * * 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. * * Copyright (c) 2006 - 2016 Pentaho Corporation and Contributors. All rights reserved. */ package org.pentaho.reporting.libraries.formula.function.datetime; import org.pentaho.reporting.libraries.formula.EvaluationException; import org.pentaho.reporting.libraries.formula.FormulaContext; import org.pentaho.reporting.libraries.formula.LibFormulaErrorValue; import org.pentaho.reporting.libraries.formula.function.Function; import org.pentaho.reporting.libraries.formula.function.ParameterCallback; import org.pentaho.reporting.libraries.formula.lvalues.TypeValuePair; import org.pentaho.reporting.libraries.formula.typing.TypeRegistry; import org.pentaho.reporting.libraries.formula.typing.coretypes.NumberType; import org.pentaho.reporting.libraries.formula.util.NumberUtil; import java.math.BigDecimal; /** * This function extracts the minute (0 through 59) from a time. * * @author Cedric Pronzato */ public class MinuteFunction implements Function { private static final BigDecimal MINUTES_PER_DAY = new BigDecimal( 24.0 * 60 ); private static final BigDecimal MINUTES = new BigDecimal( 60.0 ); private static final BigDecimal HOURS = new BigDecimal( 24.0 ); public MinuteFunction() { } public String getCanonicalName() { return "MINUTE"; } public TypeValuePair evaluate( final FormulaContext context, final ParameterCallback parameters ) throws EvaluationException { if ( parameters.getParameterCount() != 1 ) { throw EvaluationException.getInstance( LibFormulaErrorValue.ERROR_ARGUMENTS_VALUE ); } final TypeRegistry typeRegistry = context.getTypeRegistry(); final Number n = typeRegistry.convertToNumber( parameters.getType( 0 ), parameters.getValue( 0 ) ); if ( n == null ) { throw EvaluationException.getInstance( LibFormulaErrorValue.ERROR_INVALID_ARGUMENT_VALUE ); } // calculation is as follows // time * 24 so that we get the full hours (which we remove later) final BigDecimal bd = NumberUtil.getAsBigDecimal( n ); final BigDecimal hours = bd.multiply( HOURS ); final BigDecimal dayAndHoursAsInt = new BigDecimal( NumberUtil.performIntRounding( hours ).intValue() ); final BigDecimal minutesFraction = hours.subtract( dayAndHoursAsInt ); // Multiply the minutes with 60 to get the minutes as ints final BigDecimal minutes = minutesFraction.multiply( MINUTES ); // Fix for PRD-5499, contributed by Lionel Elie Mamane // final BigDecimal minutesAsInt = minutes.setScale( 0, BigDecimal.ROUND_HALF_UP ); final BigDecimal minutesAsInt = NumberUtil.performMinuteRounding( minutes ); return new TypeValuePair( NumberType.GENERIC_NUMBER, minutesAsInt ); } }