    001/*
    002 * Copyright (c) 2007-2016 Concurrent, Inc. All Rights Reserved.
    003 *
    004 * Project and contact information: http://www.cascading.org/
    005 *
    006 * This file is part of the Cascading project.
    007 *
    008 * Licensed under the Apache License, Version 2.0 (the "License");
    009 * you may not use this file except in compliance with the License.
    010 * You may obtain a copy of the License at
    011 *
    012 *     http://www.apache.org/licenses/LICENSE-2.0
    013 *
    014 * Unless required by applicable law or agreed to in writing, software
    015 * distributed under the License is distributed on an "AS IS" BASIS,
    016 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    017 * See the License for the specific language governing permissions and
    018 * limitations under the License.
    019 */
    020
    021package cascading.flow.stream.duct;
    022
    023import java.util.Iterator;
    024
    025/**
    026 *
    027 */
    028public class OpenDuct<Incoming, Outgoing> extends Duct<Grouping<Incoming, Iterator<Incoming>>, Outgoing> implements OpenWindow
    029  {
    030  public OpenDuct( Duct<Outgoing, ?> next )
    031    {
    032    super( next );
    033    }
    034
    035  @Override
    036  public void start( Duct previous )
    037    {
    038    next.start( previous );
    039    }
    040
    041  @Override
    042  public void receive( Duct previous, Grouping<Incoming, Iterator<Incoming>> grouping )
    043    {
    044    while( grouping.joinIterator.hasNext() )
    045      next.receive( previous, (Outgoing) grouping.joinIterator.next() );
    046    }
    047
    048  @Override
    049  public void complete( Duct previous )
    050    {
    051    next.complete( previous );
    052    }
    053  }