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
  23 using namespace ::com::sun::star::uno;
  24 using ::com::sun::star::beans::XPropertySet;
  25 using ::com::sun::star::beans::XPropertySetInfo;
  26
  27 bool SinglePropertySetInfoCache::hasProperty(
  28         const Reference< XPropertySet >& rPropSet,
  29         Reference< XPropertySetInfo >& rPropSetInfo )
  30 {
  31     if( !rPropSetInfo.is() )
  32         rPropSetInfo = rPropSet->getPropertySetInfo();
  33     Map::iterator aIter = map_.find( rPropSetInfo );
  34     if( aIter != map_.end() )
  35     {
  36         return (*aIter).second;
  37     }
  38     bool bRet = rPropSetInfo->hasPropertyByName( sName );
  39     // Check whether the property set info is destroyed if it is assigned to a
  40     // weak reference only; if it is destroyed, then every instance of
  41     // getPropertySetInfo returns a new object; Such property set infos must not
  42     // be cached:
  43     WeakReference < XPropertySetInfo > xWeakInfo( rPropSetInfo );
  44     rPropSetInfo = 0;
  45     rPropSetInfo = xWeakInfo;
  46     if( rPropSetInfo.is() )
  47     {
  48         map_.insert(Map::value_type(rPropSetInfo, bRet));
  49     }
  50     return bRet;
  51 }
  52
  53 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */