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: IsErrorFunctionDescription.java 3521 2007-10-16 10:55:14Z tmorgner $ 028 * ------------ 029 * (C) Copyright 2006-2007, by Pentaho Corporation. 030 */ 031 package org.jfree.formula.function.information; 032 033 import org.jfree.formula.function.AbstractFunctionDescription; 034 import org.jfree.formula.function.FunctionCategory; 035 import org.jfree.formula.typing.Type; 036 import org.jfree.formula.typing.coretypes.AnyType; 037 import org.jfree.formula.typing.coretypes.LogicalType; 038 039 /** 040 * Describes IsErrFunction function. 041 * @see IsErrFunction 042 * 043 * @author Cedric Pronzato 044 * 045 */ 046 public class IsErrorFunctionDescription extends AbstractFunctionDescription 047 { 048 049 public IsErrorFunctionDescription() 050 { 051 super("org.jfree.formula.function.information.IsError-Function"); 052 } 053 054 public FunctionCategory getCategory() 055 { 056 return InformationFunctionCategory.CATEGORY; 057 } 058 059 public int getParameterCount() 060 { 061 return 1; 062 } 063 064 public Type getParameterType(final int position) 065 { 066 if(position == 0) 067 { 068 return AnyType.TYPE; 069 } 070 return null; 071 } 072 073 public Type getValueType() 074 { 075 return LogicalType.TYPE; 076 } 077 078 public boolean isParameterMandatory(final int position) 079 { 080 return true; 081 } 082 083 }