/* 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;
import java.util.*;
/**
*
* @sharpen.ignore
*/
@decaf.Ignore(decaf.Platform.JDK11)
class JdkCollectionIterator4 implements Iterator4{
private static final Object INVALID = new Object();
private final Collection _collection;
private Iterator _iterator;
private Object _current;
public JdkCollectionIterator4(Collection collection) {
_collection = collection;
reset();
}
public Object current() {
if(_current == INVALID){
throw new IllegalStateException();
}
return _current;
}
public boolean moveNext() {
if(_iterator.hasNext()){
_current = _iterator.next();
return true;
}
_current = INVALID;
return false;
}
public void reset() {
_iterator = _collection.iterator();
_current = INVALID;
}
}