    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 Fork<Incoming, Outgoing> extends Duct<Incoming, Outgoing>
    028  {
    029  protected final Duct[] allNext; // ordinal in array must match ordinal expected downstream
    030
    031  public Fork( Duct[] allNext )
    032    {
    033    this.allNext = allNext;
    034    }
    035
    036  public Duct[] getAllNext()
    037    {
    038    return allNext;
    039    }
    040
    041  @Override
    042  public Duct getNext()
    043    {
    044    // doesn't matter, next after a fork always takes value fields, not grouping fields.
    045    return allNext[ 0 ];
    046    }
    047
    048  @Override
    049  public void start( Duct previous )
    050    {
    051    for( int i = 0; i < allNext.length; i++ )
    052      allNext[ i ].start( previous );
    053    }
    054
    055  @Override
    056  public void receive( Duct previous, int ordinal, Incoming incoming )
    057    {
    058    for( int i = 0; i < allNext.length; i++ )
    059      allNext[ i ].receive( previous, i, incoming );
    060    }
    061
    062  @Override
    063  public void complete( Duct previous )
    064    {
    065    for( int i = 0; i < allNext.length; i++ )
    066      allNext[ i ].complete( previous );
    067    }
    068  }