// -*- 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/DoubleIterator.h,v 1.10 2005/04/09 19:26:57 kommer Exp $
#ifndef acdk_util_DoubleIterator_h
#define acdk_util_DoubleIterator_h
#include "Iterator.h"
namespace acdk {
namespace util {
using namespace ::acdk::lang;
ACDK_DECL_CLASS(DoubleIterator);
/**
Joins 2 Iterator to single one. At first, all elements in iterator1 will listed.
API: Java<br/>
@author Roger Rene Kommer (mailto:kommer@artefaktur.com)
@version $Revision: 1.10 $
@date $Date: 2005/04/09 19:26:57 $
*/
class ACDK_CORE_PUBLIC DoubleIterator
: extends acdk::lang::Object,
implements Iterator
{
ACDK_WITH_METAINFO(DoubleIterator)
private:
RIterator _it1;
RIterator _it2;
mutable bool _in1;
mutable bool _checkinin1;
public :
DoubleIterator(IN(RIterator) it1, IN(RIterator) it2)
: acdk::lang::Object(),
_it1(it1),
_it2(it2),
_in1(true),
_checkinin1(false)
{
}
foreign virtual bool hasNext()
{
if (_in1 == true) {
if (_checkinin1 == true)
return true;
if (_it1->hasNext() == true) {
_checkinin1 = true;
return true;
} else
_in1 = false;
}
return _it2->hasNext();
}
foreign virtual acdk::lang::Object next()
{
if (_in1 == true) {
if (_checkinin1) {
_checkinin1 = false;
return _it1->next();
} else if (_it1->hasNext()) {
return _it1->next();
} else {
_in1 = false;
}
}
return _it2->next();
}
foreign virtual acdk::lang::Object element()
{
if (_in1 == true)
return _it1->element();
else
return _it2->element();
}
foreign virtual void remove()
{
if (_in1 == true)
_it1->remove();
else
_it2->remove();
}
};
} // namespace util
} //namespace acdk
#endif //acdk_util_DoubleIterator_h
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