/* This file is part of the db4o object database http://www.db4o.com
Copyright (C) 2004 - 2011 Versant Corporation http://www.versant.com
db4o is free software; you can redistribute it and/or modify it under
the terms of version 3 of the GNU General Public License as published
by the Free Software Foundation.
db4o 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 program. If not, see http://www.gnu.org/licenses/. */
package com.db4o.foundation;
public class SingleValueIterator implements Iterator4 {
private Object _value;
private boolean _moved;
public SingleValueIterator(Object value) {
_value = value;
}
public Object current() {
if (!_moved || _value == Iterators.NO_ELEMENT) {
throw new IllegalStateException();
}
return _value;
}
public boolean moveNext() {
if (!_moved) {
_moved = true;
return true;
}
_value = Iterators.NO_ELEMENT;
return false;
}
public void reset() {
throw new NotImplementedException();
}
}