001/*
002 * Copyright (c) 2016 Chris K Wensel <chris@wensel.net>. 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
021package cascading.flow.stream.duct;
022
023/**
024 *
025 */
026public class OrdinalDuct<Incoming, Outgoing> extends Duct<Incoming, Outgoing>
027  {
028  int ordinal = 0;
029
030  public OrdinalDuct( Duct next, int ordinal )
031    {
032    super( next );
033    this.ordinal = ordinal;
034    }
035
036  public void receive( Duct previous, int ordinal, Incoming incoming )
037    {
038    // override ordinal value
039    next.receive( previous, this.ordinal, (Outgoing) incoming );
040    }
041
042  @Override
043  public String toString()
044    {
045    final StringBuilder sb = new StringBuilder();
046    sb.append( getClass().getSimpleName() );
047    sb.append( "{ordinal=" ).append( ordinal );
048    sb.append( "{next=" ).append( next );
049    sb.append( '}' );
050    return sb.toString();
051    }
052
053  }