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: OrFunctionDescription.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.logical; 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.LogicalType; 037 038 /** 039 * Creation-Date: 04.11.2006, 18:28:55 040 * 041 * @author Thomas Morgner 042 */ 043 public class OrFunctionDescription extends AbstractFunctionDescription 044 { 045 public OrFunctionDescription() 046 { 047 super("org.jfree.formula.function.logical.Or-Function"); 048 } 049 050 public int getParameterCount() 051 { 052 return 1; 053 } 054 055 public boolean isInfiniteParameterCount() 056 { 057 return true; 058 } 059 060 public Type getParameterType(final int position) 061 { 062 return LogicalType.TYPE; 063 } 064 065 public Type getValueType() 066 { 067 return LogicalType.TYPE; 068 } 069 070 /** 071 * Defines, whether the parameter at the given position is mandatory. A 072 * mandatory parameter must be filled in, while optional parameters need not 073 * to be filled in. 074 * 075 * @return 076 */ 077 public boolean isParameterMandatory(final int position) 078 { 079 return false; 080 } 081 082 /** 083 * Returns the default value for an optional parameter. If the value returned 084 * here is null, then this either means, that the parameter is mandatory or 085 * that the default value is computed by the expression itself. 086 * 087 * @param position 088 * @return 089 */ 090 public Object getDefaultValue(final int position) 091 { 092 return null; 093 } 094 095 public FunctionCategory getCategory() 096 { 097 return LogicalFunctionCategory.CATEGORY; 098 } 099 100 }