xmloff/source/style/SinglePropertySetInfoCache.cxx

   1 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
   2 /*
   3  * This file is part of the LibreOffice project.
   4  *
   5  * This Source Code Form is subject to the terms of the Mozilla Public
   6  * License, v. 2.0. If a copy of the MPL was not distributed with this
   7  * file, You can obtain one at http://mozilla.org/MPL/2.0/.
   8  *
   9  * This file incorporates work covered by the following license notice:
  10  *
  11  *   Licensed to the Apache Software Foundation (ASF) under one or more
  12  *   contributor license agreements. See the NOTICE file distributed
  13  *   with this work for additional information regarding copyright
  14  *   ownership. The ASF licenses this file to you under the Apache
  15  *   License, Version 2.0 (the "License"); you may not use this file
  16  *   except in compliance with the License. You may obtain a copy of
  17  *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
  18  */
  19
  20 #include <cppuhelper/weakref.hxx>
  21 #include <xmloff/SinglePropertySetInfoCache.hxx>
  22 #include <com/sun/star/beans/XPropertySet.hpp>
  23
  24 using namespace ::com::sun::star::uno;
  25 using ::com::sun::star::beans::XPropertySet;
  26 using ::com::sun::star::beans::XPropertySetInfo;
  27
  28 bool SinglePropertySetInfoCache::hasProperty(
  29         const Reference< XPropertySet >& rPropSet,
  30         Reference< XPropertySetInfo >& rPropSetInfo )
  31 {
  32     if( !rPropSetInfo.is() )
  33         rPropSetInfo = rPropSet->getPropertySetInfo();
  34     Map::iterator aIter = m_Map.find( rPropSetInfo );
  35     if( aIter != m_Map.end() )
  36     {
  37         return (*aIter).second;
  38     }
  39     bool bRet = rPropSetInfo->hasPropertyByName( m_sName );
  40     // Check whether the property set info is destroyed if it is assigned to a
  41     // weak reference only; if it is destroyed, then every instance of
  42     // getPropertySetInfo returns a new object; Such property set infos must not
  43     // be cached:
  44     WeakReference < XPropertySetInfo > xWeakInfo( rPropSetInfo );
  45     rPropSetInfo = nullptr;
  46     rPropSetInfo = xWeakInfo;
  47     if( rPropSetInfo.is() )
  48     {
  49         m_Map.emplace(rPropSetInfo, bRet);
  50     }
  51     return bRet;
  52 }
  53
  54 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */