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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: NotFunctionDescription.java,v 1.4 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.function.AbstractFunctionDescription; 34: import org.jfree.formula.function.FunctionCategory; 35: import org.jfree.formula.typing.Type; 36: import org.jfree.formula.typing.coretypes.LogicalType; 37: 38: /** 39: * Creation-Date: 04.11.2006, 18:28:55 40: * 41: * @author Thomas Morgner 42: */ 43: public class NotFunctionDescription extends AbstractFunctionDescription 44: { 45: public NotFunctionDescription() 46: { 47: super("org.jfree.formula.function.logical.Not-Function"); 48: } 49: 50: public int getParameterCount() 51: { 52: return 1; 53: } 54: 55: public boolean isInfiniteParameterCount() 56: { 57: return false; 58: } 59: 60: public Type getParameterType(int position) 61: { 62: return LogicalType.TYPE; 63: } 64: 65: public Type getValueType() 66: { 67: return LogicalType.TYPE; 68: } 69: 70: /** 71: * Defines, whether the parameter at the given position is mandatory. A 72: * mandatory parameter must be filled in, while optional parameters need not 73: * to be filled in. 74: * 75: * @return 76: */ 77: public boolean isParameterMandatory(int position) 78: { 79: return true; 80: } 81: 82: /** 83: * Returns the default value for an optional parameter. If the value returned 84: * here is null, then this either means, that the parameter is mandatory or 85: * that the default value is computed by the expression itself. 86: * 87: * @param position 88: * @return 89: */ 90: public Object getDefaultValue(int position) 91: { 92: return null; 93: } 94: 95: public FunctionCategory getCategory() 96: { 97: return LogicalFunctionCategory.CATEGORY; 98: } 99: 100: }