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.local.planner;
022    
023    import java.util.Map;
024    
025    import cascading.flow.FlowStep;
026    import cascading.flow.local.LocalFlowStep;
027    import cascading.flow.planner.ElementGraph;
028    import cascading.flow.planner.FlowStepGraph;
029    import cascading.tap.Tap;
030    import org.jgrapht.Graphs;
031    
032    /**
033     *
034     */
035    public class LocalStepGraph extends FlowStepGraph
036      {
037      public LocalStepGraph( String flowName, ElementGraph elementGraph )
038        {
039        super( flowName, elementGraph );
040        }
041    
042      @Override
043      protected FlowStep createFlowStep( String stepName, int stepNum )
044        {
045        return new LocalFlowStep( stepName, stepNum );
046        }
047    
048      protected void makeStepGraph( String flowName, ElementGraph elementGraph )
049        {
050        LocalFlowStep step = (LocalFlowStep) createFlowStep( "local", 1 );
051    
052        addVertex( step );
053    
054        for( Map.Entry<String, Tap> entry : elementGraph.getSourceMap().entrySet() )
055          step.addSource( entry.getKey(), entry.getValue() );
056    
057        for( Map.Entry<String, Tap> entry : elementGraph.getSinkMap().entrySet() )
058          step.addSink( entry.getKey(), entry.getValue() );
059    
060        step.getTrapMap().putAll( elementGraph.getTrapMap() );
061    
062        Graphs.addGraph( step.getGraph(), elementGraph );
063    
064        // remove the extents
065        step.getGraph().removeVertex( ElementGraph.head );
066        step.getGraph().removeVertex( ElementGraph.tail );
067    
068        step.getGroups().addAll( elementGraph.findAllGroups() );
069        }
070      }