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/*------------------------------------------------------------------------
* SymbolIterator
*
* Copyright 2007-2010 (c) Jeff Brown <spadix@users.sourceforge.net>
*
* This file is part of the ZBar Bar Code Reader.
*
* The ZBar Bar Code Reader is free software; you can redistribute it
* and/or modify it under the terms of the GNU Lesser Public License as
* published by the Free Software Foundation; either version 2.1 of
* the License, or (at your option) any later version.
*
* The ZBar Bar Code Reader 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 Public License for more details.
*
* You should have received a copy of the GNU Lesser Public License
* along with the ZBar Bar Code Reader; if not, write to the Free
* Software Foundation, Inc., 51 Franklin St, Fifth Floor,
* Boston, MA 02110-1301 USA
*
* http://sourceforge.net/projects/zbar
*------------------------------------------------------------------------*/
package net.sourceforge.zbar;
/** Iterator over a SymbolSet.
*/
public class SymbolIterator
implements java.util.Iterator<Symbol>
{
/** Next symbol to be returned by the iterator. */
private Symbol current;
/** SymbolIterators are only created by internal interface methods. */
SymbolIterator (Symbol first)
{
current = first;
}
/** Returns true if the iteration has more elements. */
public boolean hasNext ()
{
return(current != null);
}
/** Retrieves the next element in the iteration. */
public Symbol next ()
{
if(current == null)
throw(new java.util.NoSuchElementException
("access past end of SymbolIterator"));
Symbol result = current;
long sym = current.next();
if(sym != 0)
current = new Symbol(sym);
else
current = null;
return(result);
}
/** Raises UnsupportedOperationException. */
public void remove ()
{
throw(new UnsupportedOperationException
("SymbolIterator is immutable"));
}
}
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