/*
*
* * JBoss, Home of Professional Open Source.
* * Copyright 2011, Red Hat, Inc., and individual contributors
* * as indicated by the @author tags. See the copyright.txt file in the
* * distribution for a full listing of individual contributors.
* *
* * This 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 software 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 software; if not, write to the Free
* * Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
* * 02110-1301 USA, or see the FSF site: http://www.fsf.org.
*
*/
package org.jboss.capedwarf.datastore.query;
import java.util.Iterator;
import java.util.List;
import java.util.concurrent.atomic.AtomicInteger;
import com.google.appengine.api.datastore.Cursor;
import com.google.appengine.api.datastore.Index;
import com.google.appengine.api.datastore.QueryResultIterator;
/**
* @author <a href="mailto:marko.luksa@gmail.com">Marko Luksa</a>
* @author <a href="mailto:ales.justin@jboss.org">Ales Justin</a>
*/
class QueryResultIteratorImpl<E> implements QueryResultIterator<E> {
private final Iterator<E> delegate;
private final LazySize size;
private AtomicInteger current;
public QueryResultIteratorImpl(Iterator<E> iterator, LazySize size) {
this.delegate = iterator;
this.size = size;
this.current = new AtomicInteger();
}
public boolean hasNext() {
return delegate.hasNext();
}
public E next() {
current.incrementAndGet();
return delegate.next();
}
public void remove() {
current.decrementAndGet();
delegate.remove();
}
public synchronized Cursor getCursor() {
final Cursor cursor = CapedwarfCursorHelper.createCursor(current, size);
current = new AtomicInteger(current.get());
return cursor;
}
public List<Index> getIndexList() {
return null; // TODO -- null is OK, as we don't know; as per spec
}
}