    001    /*
    002     * Copyright (c) 2007-2014 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
    021    package cascading.flow.stream;
    022
    023    import java.util.Iterator;
    024
    025    /**
    026     *
    027     */
    028    public 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      }