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1: /** 2: * ========================================= 3: * LibFormula : a free Java formula library 4: * ========================================= 5: * 6: * Project Info: http://reporting.pentaho.org/libformula/ 7: * 8: * (C) Copyright 2006-2007, by Pentaho Corporation and Contributors. 9: * 10: * This library is free software; you can redistribute it and/or modify it under the terms 11: * of the GNU Lesser General Public License as published by the Free Software Foundation; 12: * either version 2.1 of the License, or (at your option) any later version. 13: * 14: * This library is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; 15: * without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. 16: * See the GNU Lesser General Public License for more details. 17: * 18: * You should have received a copy of the GNU Lesser General Public License along with this 19: * library; if not, write to the Free Software Foundation, Inc., 59 Temple Place, Suite 330, 20: * Boston, MA 02111-1307, USA. 21: * 22: * [Java is a trademark or registered trademark of Sun Microsystems, Inc. 23: * in the United States and other countries.] 24: * 25: * 26: * ------------ 27: * $Id: OrFunction.java,v 1.7 2007/04/01 13:51:52 taqua Exp $ 28: * ------------ 29: * (C) Copyright 2006-2007, by Pentaho Corporation. 30: */ 31: package org.jfree.formula.function.logical; 32: 33: import org.jfree.formula.EvaluationException; 34: import org.jfree.formula.FormulaContext; 35: import org.jfree.formula.LibFormulaErrorValue; 36: import org.jfree.formula.function.Function; 37: import org.jfree.formula.function.ParameterCallback; 38: import org.jfree.formula.lvalues.TypeValuePair; 39: import org.jfree.formula.typing.Type; 40: import org.jfree.formula.typing.coretypes.LogicalType; 41: 42: /** 43: * Creation-Date: 04.11.2006, 18:28:15 44: * 45: * @author Thomas Morgner 46: */ 47: public class OrFunction implements Function 48: { 49: private static final TypeValuePair RETURN_FALSE = new TypeValuePair(LogicalType.TYPE, Boolean.FALSE); 50: private static final TypeValuePair RETURN_TRUE = new TypeValuePair(LogicalType.TYPE, Boolean.TRUE); 51: 52: public OrFunction() 53: { 54: } 55: 56: public String getCanonicalName() 57: { 58: return "OR"; 59: } 60: 61: public TypeValuePair evaluate(FormulaContext context, 62: ParameterCallback parameters) 63: throws EvaluationException 64: { 65: if(parameters.getParameterCount() < 1) 66: { 67: throw new EvaluationException(LibFormulaErrorValue.ERROR_ARGUMENTS_VALUE); 68: } 69: final int length = parameters.getParameterCount(); 70: for (int i = 0; i < length; i++) 71: { 72: final Type conditionType = parameters.getType(i); 73: final Object conditionValue = parameters.getValue(i); 74: final Boolean condition = context.getTypeRegistry().convertToLogical(conditionType, conditionValue); 75: if(condition == null) 76: { 77: throw new EvaluationException(LibFormulaErrorValue.ERROR_INVALID_ARGUMENT_VALUE); 78: } 79: if (Boolean.TRUE.equals(condition)) 80: { 81: return RETURN_TRUE; 82: } 83: } 84: return RETURN_FALSE; 85: 86: } 87: }