    001/*
    002 * Copyright (c) 2007-2017 Xplenty, 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.planner.graph;
    022
    023import java.util.IdentityHashMap;
    024
    025import cascading.flow.FlowElement;
    026import cascading.flow.planner.Scope;
    027import cascading.util.EnumMultiMap;
    028import org.jgrapht.Graphs;
    029import org.jgrapht.graph.SimpleDirectedGraph;
    030
    031import static cascading.flow.planner.graph.ElementGraphs.directed;
    032
    033/**
    034 *
    035 */
    036public class ElementDirectedGraph extends BaseAnnotatedElementGraph implements AnnotatedGraph
    037  {
    038  public ElementDirectedGraph()
    039    {
    040    this.graph = new DirectedGraph();
    041    }
    042
    043  public ElementDirectedGraph( ElementGraph parent )
    044    {
    045    if( parent == null )
    046      {
    047      this.graph = new DirectedGraph();
    048      return;
    049      }
    050
    051    this.graph = new DirectedGraph( directed( parent ) );
    052
    053    addParentAnnotations( parent );
    054    }
    055
    056  public ElementDirectedGraph( ElementGraph parent, EnumMultiMap annotations )
    057    {
    058    this( parent );
    059
    060    getAnnotations().addAll( annotations );
    061    }
    062
    063  @Override
    064  public ElementGraph copyElementGraph()
    065    {
    066    return new ElementDirectedGraph( this );
    067    }
    068
    069  private class DirectedGraph extends SimpleDirectedGraph<FlowElement, Scope>
    070    {
    071    public DirectedGraph()
    072      {
    073      super( Scope.class );
    074      }
    075
    076    public DirectedGraph( org.jgrapht.DirectedGraph<FlowElement, Scope> parent )
    077      {
    078      this();
    079
    080      Graphs.addGraph( this, parent );
    081      }
    082
    083    @Override
    084    protected DirectedSpecifics createDirectedSpecifics()
    085      {
    086      return new DirectedSpecifics( new IdentityHashMap<FlowElement, DirectedEdgeContainer<FlowElement, Scope>>() );
    087      }
    088    }
    089  }