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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/*************************************************************************
*
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* Copyright 2000, 2010 Oracle and/or its affiliates.
*
* OpenOffice.org - a multi-platform office productivity suite
*
* This file is part of OpenOffice.org.
*
* OpenOffice.org is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License version 3
* only, as published by the Free Software Foundation.
*
* OpenOffice.org is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser General Public License version 3 for more details
* (a copy is included in the LICENSE file that accompanied this code).
*
* You should have received a copy of the GNU Lesser General Public License
* version 3 along with OpenOffice.org. If not, see
* <http://www.openoffice.org/license.html>
* for a copy of the LGPLv3 License.
*
************************************************************************/
#include <xmloff/unointerfacetouniqueidentifiermapper.hxx>
using ::com::sun::star::uno::Reference;
using ::com::sun::star::uno::XInterface;
using ::rtl::OUString;
namespace comphelper
{
UnoInterfaceToUniqueIdentifierMapper::UnoInterfaceToUniqueIdentifierMapper()
: mnNextId( 1 )
{
}
/** returns a unique identifier for the given uno object. IF a uno object is
registered more than once, the returned identifier is always the same.
*/
const OUString& UnoInterfaceToUniqueIdentifierMapper::registerReference( const Reference< XInterface >& rInterface )
{
IdMap_t::const_iterator aIter;
if( findReference( rInterface, aIter ) )
{
return (*aIter).first;
}
else
{
OUString aId( RTL_CONSTASCII_USTRINGPARAM( "id" ) );
aId += OUString::valueOf( mnNextId++ );
return (*maEntries.insert( IdMap_t::value_type( aId, rInterface ) ).first).first;
}
}
/** registers the given uno object with the given identifier.
@returns
false, if the given identifier already exists and is not associated with the given interface
*/
bool UnoInterfaceToUniqueIdentifierMapper::registerReference( const OUString& rIdentifier, const Reference< XInterface >& rInterface )
{
IdMap_t::const_iterator aIter;
if( findReference( rInterface, aIter ) )
{
return rIdentifier != (*aIter).first;
}
else if( findIdentifier( rIdentifier, aIter ) )
{
return false;
}
else
{
maEntries.insert( IdMap_t::value_type( rIdentifier, rInterface ) );
// see if this is a reference like something we would generate in the future
const sal_Unicode *p = rIdentifier.getStr();
sal_Int32 nLength = rIdentifier.getLength();
// see if the identifier is 'id' followed by a pure integer value
if( nLength < 2 || p[0] != 'i' || p[1] != 'd' )
return true;
nLength -= 2;
p += 2;
while(nLength--)
{
if( (*p < '0') || (*p > '9') )
return true; // a custom id, that will never conflict with genereated id's
p++;
}
// the identifier is a pure integer value
// so we make sure we will never generate
// an integer value like this one
sal_Int32 nId = rIdentifier.copy(2).toInt32();
if( mnNextId <= nId )
mnNextId = nId + 1;
return true;
}
}
/** @returns
the identifier for the given uno object. If this uno object is not already
registered, an empty string is returned
*/
const OUString& UnoInterfaceToUniqueIdentifierMapper::getIdentifier( const Reference< XInterface >& rInterface ) const
{
IdMap_t::const_iterator aIter;
if( findReference( rInterface, aIter ) )
{
return (*aIter).first;
}
else
{
static const OUString aEmpty;
return aEmpty;
}
}
/** @returns
the uno object that is registered with the given identifier. If no uno object
is registered with the given identifier, an empty reference is returned.
*/
const Reference< XInterface >& UnoInterfaceToUniqueIdentifierMapper::getReference( const OUString& rIdentifier ) const
{
IdMap_t::const_iterator aIter;
if( findIdentifier( rIdentifier, aIter ) )
{
return (*aIter).second;
}
else
{
static const Reference< XInterface > aEmpty;
return aEmpty;
}
}
bool UnoInterfaceToUniqueIdentifierMapper::findReference( const Reference< XInterface >& rInterface, IdMap_t::const_iterator& rIter ) const
{
rIter = maEntries.begin();
const IdMap_t::const_iterator aEnd( maEntries.end() );
while( rIter != aEnd )
{
if( (*rIter).second == rInterface )
return true;
rIter++;
}
return false;
}
bool UnoInterfaceToUniqueIdentifierMapper::findIdentifier( const OUString& rIdentifier, IdMap_t::const_iterator& rIter ) const
{
rIter = maEntries.find( rIdentifier );
return rIter != maEntries.end();
}
}
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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