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      }