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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 .
*/
#ifndef INCLUDED_OOX_HELPER_REFMAP_HXX
#define INCLUDED_OOX_HELPER_REFMAP_HXX
#include <algorithm>
#include <functional>
#include <map>
#include <memory>
namespace oox {
/** Template for a map of ref-counted objects with additional accessor functions.
An instance of the class RefMap< Type > stores elements of the type
std::shared_ptr< Type >. The new accessor functions has() and get()
work correctly for nonexisting keys, there is no need to check the passed
key before.
*/
template< typename KeyType, typename ObjType, typename CompType = std::less< KeyType > >
class RefMap : public std::map< KeyType, std::shared_ptr< ObjType >, CompType >
{
public:
typedef std::map< KeyType, std::shared_ptr< ObjType >, CompType > container_type;
typedef typename container_type::key_type key_type;
typedef typename container_type::mapped_type mapped_type;
typedef typename container_type::value_type value_type;
typedef typename container_type::key_compare key_compare;
public:
/** Returns true, if the object associated to the passed key exists.
Returns false, if the key exists but points to an empty reference. */
bool has( key_type nKey ) const
{
const mapped_type* pxRef = getRef( nKey );
return pxRef && pxRef->get();
}
/** Returns a reference to the object associated to the passed key, or an
empty reference on error. */
mapped_type get( key_type nKey ) const
{
if( const mapped_type* pxRef = getRef( nKey ) ) return *pxRef;
return mapped_type();
}
/** Calls the passed functor for every contained object, automatically
skips all elements that are empty references. */
template< typename FunctorType >
void forEach( const FunctorType& rFunctor ) const
{
std::for_each( this->begin(), this->end(), ForEachFunctor< FunctorType >( rFunctor ) );
}
/** Calls the passed member function of ObjType on every contained object,
automatically skips all elements that are empty references. */
template< typename FuncType >
void forEachMem( FuncType pFunc ) const
{
forEach( ::std::bind( pFunc, std::placeholders::_1 ) );
}
/** Calls the passed member function of ObjType on every contained object,
automatically skips all elements that are empty references. */
template< typename FuncType, typename ParamType1, typename ParamType2 >
void forEachMem( FuncType pFunc, ParamType1 aParam1, ParamType2 aParam2 ) const
{
forEach( ::std::bind( pFunc, std::placeholders::_1, aParam1, aParam2 ) );
}
/** Calls the passed member function of ObjType on every contained object,
automatically skips all elements that are empty references. */
template< typename FuncType, typename ParamType1, typename ParamType2, typename ParamType3 >
void forEachMem( FuncType pFunc, ParamType1 aParam1, ParamType2 aParam2, ParamType3 aParam3 ) const
{
forEach( ::std::bind( pFunc, std::placeholders::_1, aParam1, aParam2, aParam3 ) );
}
/** Calls the passed functor for every contained object. Passes the key as
first argument and the object reference as second argument to rFunctor. */
template< typename FunctorType >
void forEachWithKey( const FunctorType& rFunctor ) const
{
std::for_each( this->begin(), this->end(), ForEachFunctorWithKey< FunctorType >( rFunctor ) );
}
/** Calls the passed member function of ObjType on every contained object.
Passes the object key as argument to the member function. */
template< typename FuncType >
void forEachMemWithKey( FuncType pFunc ) const
{
forEachWithKey( ::std::bind( pFunc, std::placeholders::_2, std::placeholders::_1 ) );
}
private:
template< typename FunctorType >
struct ForEachFunctor
{
FunctorType maFunctor;
explicit ForEachFunctor( FunctorType aFunctor ) : maFunctor(std::move( aFunctor )) {}
void operator()( const value_type& rValue ) { if( rValue.second.get() ) maFunctor( *rValue.second ); }
};
template< typename FunctorType >
struct ForEachFunctorWithKey
{
FunctorType maFunctor;
explicit ForEachFunctorWithKey( FunctorType aFunctor ) : maFunctor(std::move( aFunctor )) {}
void operator()( const value_type& rValue ) { if( rValue.second.get() ) maFunctor( rValue.first, *rValue.second ); }
};
const mapped_type* getRef( key_type nKey ) const
{
typename container_type::const_iterator aIt = this->find( nKey );
return (aIt == this->end()) ? nullptr : &aIt->second;
}
};
} // namespace oox
#endif
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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