001 /* 002 * Copyright (c) 2007-2015 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 */ 020 021 package cascading.flow.stream; 022 023 import org.jgrapht.EdgeFactory; 024 import org.jgrapht.graph.SimpleDirectedGraph; 025 026 /** 027 * 028 */ 029 public 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 @Override 059 public boolean equals( Object object ) 060 { 061 if( this == object ) 062 return true; 063 064 Ordinal ordinal = (Ordinal) object; 065 066 if( count != ordinal.count ) 067 return false; 068 069 return true; 070 } 071 072 @Override 073 public int hashCode() 074 { 075 return count; 076 } 077 } 078 079 public DuctGraph() 080 { 081 super( new DuctOrdinalEdgeFactory() ); 082 } 083 084 public synchronized DuctGraph.Ordinal makeOrdinal( int ordinal ) 085 { 086 return ( (DuctOrdinalEdgeFactory) getEdgeFactory() ).makeOrdinal( ordinal ); 087 } 088 }