    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  }