1/************************************************************************* 2 * 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * Copyright 2000, 2010 Oracle and/or its affiliates. 6 * 7 * OpenOffice.org - a multi-platform office productivity suite 8 * 9 * This file is part of OpenOffice.org. 10 * 11 * OpenOffice.org is free software: you can redistribute it and/or modify 12 * it under the terms of the GNU Lesser General Public License version 3 13 * only, as published by the Free Software Foundation. 14 * 15 * OpenOffice.org is distributed in the hope that it will be useful, 16 * but WITHOUT ANY WARRANTY; without even the implied warranty of 17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 18 * GNU Lesser General Public License version 3 for more details 19 * (a copy is included in the LICENSE file that accompanied this code). 20 * 21 * You should have received a copy of the GNU Lesser General Public License 22 * version 3 along with OpenOffice.org. If not, see 23 * <http://www.openoffice.org/license.html> 24 * for a copy of the LGPLv3 License. 25 * 26 ************************************************************************/ 27#ifndef __com_sun_star_beans_Optional_idl__ 28#define __com_sun_star_beans_Optional_idl__ 29 30module com { module sun { module star { module beans { 31 32/** 33 An optional value of a given type. 34 35 <p>This structure is used as the type of interface attributes corresponding 36 to instances of <type scopye="com::sun::star::beans">Property</type> that 37 have the <const 38 scope="com::sun::star::beans">PropertyAttribute::MAYBEVOID</const>. It might 39 also be useful in other situations, for example as the return type of an 40 interface method.</p> 41 */ 42published struct Optional<T> { 43 /** 44 Marks this structure instance as having an actual value. 45 */ 46 boolean IsPresent; 47 48 /** 49 The actual value of this structure instance. 50 51 <p>If no actual value is present, a producer of such a structure instance 52 should leave this member defaulted, and a consumer of such a structure 53 instance should ignore the specific value stored in this member.</p> 54 */ 55 T Value; 56}; 57 58}; }; }; }; 59 60#endif 61