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    /**
024     *
025     */
026    public class CloseReducingDuct<Group, Incoming, Outgoing> extends Duct<Incoming, Outgoing> implements CloseWindow, Reducing<Group, Outgoing>
027      {
028      public CloseReducingDuct( Duct<Outgoing, ?> next )
029        {
030        super( next );
031        }
032    
033      @Override
034      public void receive( Duct previous, Incoming incoming )
035        {
036        // do nothing
037        }
038    
039      @Override
040      public void startGroup( Duct previous, Group group )
041        {
042        }
043    
044      @Override
045      public void completeGroup( Duct previous, Outgoing outgoing )
046        {
047        next.receive( previous, outgoing );
048        }
049      }