CollectionIterator.cc

Go to the documentation of this file.

/*
 * CollectionIterator.cc
 *
 * Smalltalk like class library for C++
 * Collection elements iterator.
 *
 * Copyright (c) 2003 Milan Cermak
 */
/*
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * 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 GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */
#include <stlib/CollectionIterator.h>
#include <stlib/Collection.h>
#include <stlib/String.h>

CollectionIterator::CollectionIterator(const Collection *coll)
{
    collection = coll;
    item = nil;
    index = -1;
    next();
}

/* Class-accessing protocol */
String *CollectionIterator::className(void) const
{
    return new String("CollectionIterator");
}

/* Accessing protocol */
Object *CollectionIterator::value(void)
{
    return item;
}

long CollectionIterator::position(void)
{
    return index;
}

void CollectionIterator::position(long pos)
{
    index = pos;
}

/* Testing protocol */
bool CollectionIterator::finished(void)
{
    return index >= collection->capacity();
}

/* Enumeration protocol */
void CollectionIterator::next(void)
{
    index++;
    if (!finished()) item = collection->privNextForIterator(this);
                else item = nil;
}

---