001/*
002 * Copyright (c) 2007-2016 Concurrent, Inc. 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
023import org.jgrapht.EdgeFactory;
024import org.jgrapht.graph.SimpleDirectedGraph;
025
026/**
027 *
028 */
029public class DuctGraph extends SimpleDirectedGraph<Duct, DuctGraph.Ordinal>
030  {
031  private static class DuctOrdinalEdgeFactory implements EdgeFactory<Duct, Ordinal>
032    {
033    int count = 0;
034
035    @Override
036    public DuctGraph.Ordinal createEdge( Duct lhs, Duct rhs )
037      {
038      return makeOrdinal( 0 );
039      }
040
041    public DuctGraph.Ordinal makeOrdinal( int ordinal )
042      {
043      return new DuctGraph.Ordinal( count++, ordinal );
044      }
045    }
046
047  public static class Ordinal
048    {
049    int count;
050    int ordinal;
051
052    public Ordinal( int count, int ordinal )
053      {
054      this.count = count;
055      this.ordinal = ordinal;
056      }
057
058    public int getOrdinal()
059      {
060      return ordinal;
061      }
062
063    @Override
064    public boolean equals( Object object )
065      {
066      if( this == object )
067        return true;
068
069      Ordinal ordinal = (Ordinal) object;
070
071      if( count != ordinal.count )
072        return false;
073
074      return true;
075      }
076
077    @Override
078    public int hashCode()
079      {
080      return count;
081      }
082
083    @Override
084    public String toString()
085      {
086      final StringBuilder sb = new StringBuilder( "Ordinal{" );
087      sb.append( "count=" ).append( count );
088      sb.append( ", ordinal=" ).append( ordinal );
089      sb.append( '}' );
090      return sb.toString();
091      }
092    }
093
094  public DuctGraph()
095    {
096    super( new DuctOrdinalEdgeFactory() );
097    }
098
099  public synchronized DuctGraph.Ordinal makeOrdinal( int ordinal )
100    {
101    return ( (DuctOrdinalEdgeFactory) getEdgeFactory() ).makeOrdinal( ordinal );
102    }
103  }