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/*
FILE: MultiVisitor.hpp
AUTHOR: Scott Kuehn, Shane Neph
CREATE DATE: Thu Sep 20 15:00:33 PDT 2007
PROJECT: utility
ID: $Id$
*/
//
// BEDOPS
// Copyright (C) 2011-2022 Shane Neph, Scott Kuehn and Alex Reynolds
//
// This program is free software; you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation; either version 2 of the License, or
// (at your option) any later version.
//
// This program 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 General Public License for more details.
//
// You should have received a copy of the GNU General Public License along
// with this program; if not, write to the Free Software Foundation, Inc.,
// 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
//
#ifndef MULTIVISITOR_HPP
#define MULTIVISITOR_HPP
#include <algorithm>
#include <functional>
#include <vector>
namespace Visitors {
template
<
typename ProcessFields, // belongs to MultiVisitor only; not contained visitors
typename ProcessRows, // belongs to MultiVisitor only; not contained visitors
typename BaseVisitor
>
struct MultiVisitor : BaseVisitor {
typedef BaseVisitor BaseClass;
typedef ProcessFields ProcessFieldType;
typedef ProcessRows ProcessRowType;
typedef typename BaseClass::RefType RefType;
typedef typename BaseClass::MapType MapType;
typedef std::vector<BaseClass*> GroupType;
explicit MultiVisitor(GroupType& visitors,
const ProcessFieldType& pFields = ProcessFieldType(),
const ProcessRowType& pRows = ProcessRowType(),
bool processAll = true)
: BaseVisitor(), t_(visitors), pFields_(pFields), pRows_(pRows),
pAll_(processAll), cnt_(0)
{ /* */ }
template <typename BaseDistType>
explicit MultiVisitor(GroupType& visitors,
const BaseDistType& dist,
const ProcessFieldType& pFields = ProcessFieldType(),
const ProcessRowType& pRows = ProcessRowType(),
bool processAll = true)
: BaseVisitor(dist), t_(visitors), pFields_(pFields), pRows_(pRows),
pAll_(processAll), cnt_(0)
{ /* */ }
void Add(MapType* u) {
void (BaseClass::*memberFuncPtr)(MapType*) = &BaseClass::Add;
// std::for_each(t_.begin(), t_.end(), std::bind2nd(std::mem_fun(memberFuncPtr), u)); # deprecated in C++11
std::for_each(t_.begin(), t_.end(), std::bind(std::mem_fn(memberFuncPtr), std::placeholders::_1, u));
++cnt_;
}
void Delete(MapType* u) {
void (BaseClass::*memberFuncPtr)(MapType*) = &BaseClass::Delete;
// std::for_each(t_.begin(), t_.end(), std::bind2nd(std::mem_fun(memberFuncPtr), u)); # deprecated in C++11
std::for_each(t_.begin(), t_.end(), std::bind(std::mem_fn(memberFuncPtr), std::placeholders::_1, u));
--cnt_;
}
void DoneReference() {
if ( !pAll_ && cnt_ == 0 )
return;
typename GroupType::const_iterator i = t_.begin();
if ( i != t_.end() )
(*i)->DoneReference();
else
return;
for ( ++i; i != t_.end(); ++i ) {
pFields_.operator()();
(*i)->DoneReference();
} // for
pRows_.operator()();
}
void SetReference(RefType* t) {
void (BaseClass::*memberFuncPtr)(RefType*) = &BaseClass::SetReference;
// std::for_each(t_.begin(), t_.end(), std::bind2nd(std::mem_fun(memberFuncPtr), t)); # deprecated in C++11
std::for_each(t_.begin(), t_.end(), std::bind(std::mem_fn(memberFuncPtr), std::placeholders::_1, t));
}
/* not used by BED visitors to date. Pain if it is with nested elements. */
/*
void Purge() {
std::for_each(t_.begin(), t_.end(), std::mem_fun(&BaseClass::Purge));
}
*/
void End() {
// std::for_each(t_.begin(), t_.end(), std::mem_fun(&BaseClass::End));
std::for_each(t_.begin(), t_.end(), std::mem_fn(&BaseClass::End));
}
virtual ~MultiVisitor() {
for ( cGtI gi = t_.begin(); gi != t_.end(); ++gi )
delete *gi;
}
protected:
typedef typename GroupType::const_iterator cGtI;
GroupType& t_;
ProcessFields pFields_;
ProcessRows pRows_;
const bool pAll_;
long cnt_;
};
} // namespace Visitors
#endif // MULTIVISITOR_HPP
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