001/* 002 * Copyright (c) 2016-2017 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.planner.graph; 023 024import java.util.IdentityHashMap; 025 026import cascading.flow.FlowElement; 027import cascading.flow.planner.Scope; 028import cascading.util.EnumMultiMap; 029import org.jgrapht.Graphs; 030import org.jgrapht.graph.SimpleDirectedGraph; 031import org.jgrapht.graph.specifics.DirectedEdgeContainer; 032import org.jgrapht.graph.specifics.DirectedSpecifics; 033 034import static cascading.flow.planner.graph.ElementGraphs.directed; 035 036/** 037 * 038 */ 039public class ElementDirectedGraph extends BaseAnnotatedElementGraph implements AnnotatedGraph 040 { 041 public ElementDirectedGraph() 042 { 043 this.graph = new DirectedGraph(); 044 } 045 046 public ElementDirectedGraph( ElementGraph parent ) 047 { 048 if( parent == null ) 049 { 050 this.graph = new DirectedGraph(); 051 return; 052 } 053 054 this.graph = new DirectedGraph( directed( parent ) ); 055 056 addParentAnnotations( parent ); 057 } 058 059 public ElementDirectedGraph( ElementGraph parent, EnumMultiMap annotations ) 060 { 061 this( parent ); 062 063 getAnnotations().addAll( annotations ); 064 } 065 066 @Override 067 public ElementGraph copyElementGraph() 068 { 069 return new ElementDirectedGraph( this ); 070 } 071 072 private class DirectedGraph extends SimpleDirectedGraph<FlowElement, Scope> 073 { 074 public DirectedGraph() 075 { 076 super( Scope.class ); 077 } 078 079 public DirectedGraph( org.jgrapht.Graph<FlowElement, Scope> parent ) 080 { 081 this(); 082 083 Graphs.addGraph( this, parent ); 084 } 085 086 @Override 087 protected DirectedSpecifics createSpecifics( boolean directed ) 088 { 089 return new DirectedSpecifics( this, new IdentityHashMap<FlowElement, DirectedEdgeContainer<FlowElement, Scope>>() ); 090 } 091 } 092 }