// -*- mode:C++; tab-width:2; c-basic-offset:2; indent-tabs-mode:nil -*-
//
// Copyright (C) 2000-2005 by Roger Rene Kommer / artefaktur, Kassel, Germany.
//
// This library is free software; you can redistribute it and/or
// modify it under the terms of the GNU Library General Public License (LGPL).
//
//
// This library 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
// License ACDK-FreeLicense document enclosed in the distribution
// for more for more details.
// This file is part of the Artefaktur Component Development Kit:
// ACDK
//
// Please refer to
// - http://www.acdk.de
// - http://www.artefaktur.com
// - http://acdk.sourceforge.net
// for more information.
//
// $Header: /cvsroot/acdk/acdk/acdk_core/src/acdk/util/TAbstractListListIterator.h,v 1.7 2005/04/09 19:26:57 kommer Exp $
#ifndef acdk_util_TAbstractListListIterator_h
#define acdk_util_TAbstractListListIterator_h
#include "TListIterator.h"
#include "TAbstractList.h"
#include "ConcurrentModificationException.h"
#include <acdk/lang/IllegalStateException.h>
#include "NoSuchElementException.h"
namespace acdk {
namespace util {
/**
this is just a private implementation of the Iterator for AbstractList *
API: Java<br/>
@author Roger Rene Kommer (mailto:kommer@artefaktur.com)
@version $Revision: 1.7 $
@date $Date: 2005/04/09 19:26:57 $
*/
template <class T>
class TAbstractListListIterator
: extends acdk::lang::Object,
implements TListIterator<T>
{
public:
typedef T RValueType;
typedef TList<RValueType> ListType;
typedef typename ListType::RefType RListType;
typedef TListIterator<RValueType> ListIteratorType;
typedef typename ListIteratorType::RefType RListIteratorType;
typedef TAbstractList<RValueType> AbstractListType;
typedef typename AbstractListType::RefType RAbstractListType;
typedef TAbstractListListIterator<RValueType> AbstractListListIteratorType;
typedef RefHolder<AbstractListListIteratorType> RAbstractListListIteratorType;
typedef RAbstractListListIteratorType RefType;
private:
RAbstractListType _list;
int _knownMod;
int _position;
transient int _lastReturned;
void _checkMod()
{
if (_knownMod != _list->_modCount)
THROW0(ConcurrentModificationException);
}
public:
TAbstractListListIterator(IN(RAbstractListType) list, int index)
: acdk::lang::Object(),
_list(list),
_knownMod(list->_modCount),
_position(index),
_lastReturned(-1)
{
}
foreign virtual bool hasNext()
{
_checkMod();
return _position < _list->size();
}
foreign virtual bool hasPrevious()
{
_checkMod();
return _position > 0;
}
foreign virtual RValueType next()
{
_checkMod();
if (hasNext() == false) {
THROW0(NoSuchElementException);
}
_lastReturned = _position++;
return _list->get(_lastReturned);
}
foreign virtual RValueType element()
{
_checkMod();
if (hasNext() == false) {
THROW0(NoSuchElementException);
}
_lastReturned = _position;
return _list->get(_lastReturned);
}
foreign virtual RValueType previous()
{
_checkMod();
if (hasPrevious() == false) {
THROW0(NoSuchElementException);
}
_lastReturned = --_position;
return _list->get(_lastReturned);
}
foreign virtual int nextIndex()
{
_checkMod();
return _position;
}
foreign virtual int previousIndex()
{
_checkMod();
return _position - 1;
}
foreign virtual void remove()
{
_checkMod();
if (_lastReturned < 0) {
THROW0(IllegalStateException);
}
_list->remove(_lastReturned);
_knownMod = _list->_modCount;
_position = _lastReturned;
_lastReturned = -1;
}
foreign virtual void set(IN(RValueType) o)
{
_checkMod();
if (_lastReturned < 0) {
THROW0(IllegalStateException);
}
_list->set(_lastReturned, o);
_knownMod = _list->_modCount;
}
foreign virtual void add(IN(RValueType) o)
{
_checkMod();
_list->add(_position++, o);
_lastReturned = -1;
_knownMod = _list->_modCount;
}
};
template <class T>
inline
typename TAbstractList<T>::RListIteratorType
TAbstractList<T>::listIterator(int index)
{
typedef TAbstractListListIterator<RValueType> AbstractListListIteratorType;
return new (TAbstractList<T>::allocator()) AbstractListListIteratorType(this, index);
}
} // util
} // acdk
#endif //acdk_util_TAbstractListListIterator_h
|