001/*
002 * Copyright (c) 2016 Chris K Wensel <chris@wensel.net>. All Rights Reserved.
003 * Copyright (c) 2007-2017 Xplenty, Inc. All Rights Reserved.
004 *
005 * Project and contact information: http://www.cascading.org/
006 *
007 * This file is part of the Cascading project.
008 *
009 * Licensed under the Apache License, Version 2.0 (the "License");
010 * you may not use this file except in compliance with the License.
011 * You may obtain a copy of the License at
012 *
013 *     http://www.apache.org/licenses/LICENSE-2.0
014 *
015 * Unless required by applicable law or agreed to in writing, software
016 * distributed under the License is distributed on an "AS IS" BASIS,
017 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
018 * See the License for the specific language governing permissions and
019 * limitations under the License.
020 */
021
022package cascading.flow.stream.duct;
023
024/**
025 *
026 */
027public class CloseReducingDuct<Group, Incoming, Outgoing> extends Duct<Incoming, Outgoing> implements CloseWindow, Reducing<Group, Outgoing>
028  {
029  public CloseReducingDuct( Duct<Outgoing, ?> next )
030    {
031    super( next );
032    }
033
034  @Override
035  public void receive( Duct previous, int ordinal, Incoming incoming )
036    {
037    // do nothing
038    }
039
040  @Override
041  public void startGroup( Duct previous, Group group )
042    {
043    }
044
045  @Override
046  public void completeGroup( Duct previous, Outgoing outgoing )
047    {
048    next.receive( previous, 0, outgoing );
049    }
050  }