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/*
* MessageSetTokenizer.java
* Copyright (C) 2005 The Free Software Foundation
*
* This file is part of GNU inetlib, a library.
*
* GNU inetlib 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.
*
* GNU inetlib 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 library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*
* Linking this library statically or dynamically with other modules is
* making a combined work based on this library. Thus, the terms and
* conditions of the GNU General Public License cover the whole
* combination.
*
* As a special exception, the copyright holders of this library give you
* permission to link this library with independent modules to produce an
* executable, regardless of the license terms of these independent
* modules, and to copy and distribute the resulting executable under
* terms of your choice, provided that you also meet, for each linked
* independent module, the terms and conditions of the license of that
* module. An independent module is a module which is not derived from
* or based on this library. If you modify this library, you may extend
* this exception to your version of the library, but you are not
* obliged to do so. If you do not wish to do so, delete this
* exception statement from your version.
*/
package gnu.inet.imap;
import java.util.Iterator;
import java.util.LinkedList;
/**
* Tokenizer for an IMAP UID message-set.
* This iterates over the UIDs specified in the set.
*
* @author <a href='mailto:dog@gnu.org'>Chris Burdess</a>
*/
class MessageSetTokenizer
implements Iterator
{
private Iterator iterator;
MessageSetTokenizer(String spec)
{
LinkedList acc = new LinkedList();
for (int ci = spec.indexOf(','); ci != -1; ci = spec.indexOf(','))
{
addToken(acc, spec.substring(0, ci));
spec = spec.substring(ci + 1);
}
addToken(acc, spec);
iterator = acc.iterator();
}
private void addToken(LinkedList acc, String token)
{
int ci = token.indexOf(':');
if (ci == -1)
{
acc.add(new Long(token));
}
else
{
long start = Long.parseLong(token.substring(0, ci));
long end = Long.parseLong(token.substring(ci + 1));
while (start <= end)
{
acc.add(new Long(start++));
}
}
}
public boolean hasNext()
{
return iterator.hasNext();
}
public Object next()
{
return iterator.next();
}
public void remove()
{
iterator.remove();
}
}
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