libreoffice/xmloff/source/style/SinglePropertySetInfoCache.cxx

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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * Copyright 2008 by Sun Microsystems, Inc.
 *
 * OpenOffice.org - a multi-platform office productivity suite
 *
 * $RCSfile: SinglePropertySetInfoCache.cxx,v $
 * $Revision: 1.6 $
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// MARKER(update_precomp.py): autogen include statement, do not remove
#include "precompiled_xmloff.hxx"
#include <com/sun/star/lang/XTypeProvider.hpp>
#include <cppuhelper/weakref.hxx>

#ifndef _XMLOFF_SINGLEPROPERTYSETINFOCACHE_HXX
#include <xmloff/SinglePropertySetInfoCache.hxx>
#endif

using namespace ::com::sun::star::uno;
using ::com::sun::star::lang::XTypeProvider;
using ::com::sun::star::beans::XPropertySet;
using ::com::sun::star::beans::XPropertySetInfo;

sal_Bool SinglePropertySetInfoCache::hasProperty(
        const Reference< XPropertySet >& rPropSet,
        Reference< XPropertySetInfo >& rPropSetInfo )
{
    if( !rPropSetInfo.is() )
        rPropSetInfo = rPropSet->getPropertySetInfo();
    sal_Bool bRet = sal_False, bValid = sal_False;
    Reference < XTypeProvider > xTypeProv( rPropSet, UNO_QUERY );
    Sequence< sal_Int8 > aImplId;
    if( xTypeProv.is() )
    {
        aImplId = xTypeProv->getImplementationId();
        if( aImplId.getLength() == 16 )
        {
            // The key must not be created outside this block, because it
            // keeps a reference to the property set info.
            PropertySetInfoKey aKey( rPropSetInfo, aImplId );
            iterator aIter = find( aKey );
            if( aIter != end() )
            {
                bRet = (*aIter).second;
                bValid = sal_True;
            }
        }
    }
    if( !bValid )
    {
        bRet = rPropSetInfo->hasPropertyByName( sName );
        if( xTypeProv.is() && aImplId.getLength() == 16 )
        {
            // Check whether the property set info is destroyed if it is
            // assigned to a weak reference only. If it is destroyed, then
            // every instance of getPropertySetInfo returns a new object.
            // Such property set infos must not be cached.
            WeakReference < XPropertySetInfo > xWeakInfo( rPropSetInfo );
            rPropSetInfo = 0;
            rPropSetInfo = xWeakInfo;
            if( rPropSetInfo.is() )
            {
                PropertySetInfoKey aKey( rPropSetInfo, aImplId );
                value_type aValue( aKey, bRet );
                insert( aValue );
            }
        }
    }

    return bRet;
}