aria2/src/PStringSegment.cc

/* <!-- copyright */
/*
 * aria2 - The high speed download utility
 *
 * Copyright (C) 2006 Tatsuhiro Tsujikawa
 *
 * 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
 *
 * In addition, as a special exception, the copyright holders give
 * permission to link the code of portions of this program with the
 * OpenSSL library under certain conditions as described in each
 * individual source file, and distribute linked combinations
 * including the two.
 * You must obey the GNU General Public License in all respects
 * for all of the code used other than OpenSSL.  If you modify
 * file(s) with this exception, you may extend this exception to your
 * version of the file(s), but you are not obligated to do so.  If you
 * do not wish to do so, delete this exception statement from your
 * version.  If you delete this exception statement from all source
 * files in the program, then also delete it here.
 */
/* copyright --> */
#include "PStringSegment.h"
#include "FatalException.h"
#include "PStringVisitor.h"

namespace aria2 {

PStringSegment::PStringSegment(const std::string& value,
			       const SharedHandle<PStringDatum>& next):
  _value(value), _next(next) {}

PStringSegment::~PStringSegment() {}

void PStringSegment::accept(PStringVisitor* visitor)
{
  PStringSegmentVisitor* v = dynamic_cast<PStringSegmentVisitor*>(visitor);
  if(!v) {
    throw new FatalException("Class cast exception");
  }
  v->hello(this);
  if(!_next.isNull()) {
    _next->accept(visitor);
  }
  v->goodbye(this);
}

const std::string& PStringSegment::getValue() const
{
  return _value;
}

bool PStringSegment::hasNext() const
{
  return !_next.isNull();
}

SharedHandle<PStringDatum> PStringSegment::getNext() const
{
  return _next;
}

} // namespace aria2