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 }