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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/*
* This file is part of the LibreOffice project.
*
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/.
*
* This file incorporates work covered by the following license notice:
*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed
* with this work for additional information regarding copyright
* ownership. The ASF licenses this file to you under the Apache
* License, Version 2.0 (the "License"); you may not use this file
* except in compliance with the License. You may obtain a copy of
* the License at http://www.apache.org/licenses/LICENSE-2.0 .
*/
#include <algorithm>
#include <xmloff/unointerfacetouniqueidentifiermapper.hxx>
using namespace ::com::sun::star;
using ::com::sun::star::uno::Reference;
using ::com::sun::star::uno::XInterface;
namespace comphelper
{
UnoInterfaceToUniqueIdentifierMapper::UnoInterfaceToUniqueIdentifierMapper()
: mnNextId( 1 )
{
}
UnoInterfaceToUniqueIdentifierMapper::~UnoInterfaceToUniqueIdentifierMapper()
{
SAL_WARN_IF( !maReserved.empty(), "xmloff",
"there are " << maReserved.size()
<< " ids left. This means a data loss: some connection(s) to shape(s) are missing."
);
}
/** 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 )
{
// Be certain that the references we store in our table are to the
// leading / primary XInterface - cf. findReference
uno::Reference< uno::XInterface > xRef( rInterface, uno::UNO_QUERY );
IdMap_t::const_iterator aIter;
if( findReference( xRef, aIter ) )
{
return (*aIter).first;
}
else
{
OUString aId( "id" );
aId += OUString::valueOf( mnNextId++ );
return (*maEntries.insert( IdMap_t::value_type( aId, xRef ) ).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;
// Be certain that the references we store in our table are to the
// leading / primary XInterface - cf. findReference
uno::Reference< uno::XInterface > xRef( rInterface, uno::UNO_QUERY );
if( findReference( xRef, aIter ) )
{
return rIdentifier != (*aIter).first;
}
else if( findIdentifier( rIdentifier, aIter ) || findReserved( rIdentifier ) )
{
return false;
}
else
{
maEntries.insert( IdMap_t::value_type( rIdentifier, xRef ) );
// 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
{
uno::Reference< uno::XInterface > xRef( rInterface, uno::UNO_QUERY );
rIter = maEntries.begin();
const IdMap_t::const_iterator aEnd( maEntries.end() );
while( rIter != aEnd )
{
// The Reference == operator, does a repeated queryInterface on
// this to ensure we got the right XInterface base-class. However,
// we can be sure that this has been done already by the time we
// get to here.
if( (*rIter).second.get() == xRef.get() )
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();
}
bool UnoInterfaceToUniqueIdentifierMapper::reserveIdentifier( const rtl::OUString& rIdentifier )
{
if ( findReserved( rIdentifier ) )
return false;
maReserved.push_back( rIdentifier );
return true;
}
bool UnoInterfaceToUniqueIdentifierMapper::registerReservedReference(
const rtl::OUString& rIdentifier,
const com::sun::star::uno::Reference< com::sun::star::uno::XInterface >& rInterface )
{
Reserved_t::const_iterator aIt;
if ( !findReserved( rIdentifier, aIt ) )
return false;
Reserved_t::iterator aRemoveIt( maReserved.begin() + ( aIt - maReserved.begin() ) );
maReserved.erase( aRemoveIt );
registerReference( rIdentifier, rInterface );
return true;
}
bool UnoInterfaceToUniqueIdentifierMapper::findReserved( const OUString& rIdentifier ) const
{
Reserved_t::const_iterator aDummy;
return findReserved( rIdentifier, aDummy );
}
bool UnoInterfaceToUniqueIdentifierMapper::findReserved(
const OUString& rIdentifier,
Reserved_t::const_iterator& rIter ) const
{
rIter = std::find( maReserved.begin(), maReserved.end(), rIdentifier );
return rIter != maReserved.end();
}
}
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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