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.tez.planner.rule.expressiongraph;
022
023import cascading.flow.planner.iso.expression.AnnotationExpression;
024import cascading.flow.planner.iso.expression.ElementCapture;
025import cascading.flow.planner.iso.expression.ExpressionGraph;
026import cascading.flow.planner.iso.expression.FlowElementExpression;
027import cascading.flow.planner.iso.expression.PathScopeExpression;
028import cascading.flow.planner.iso.expression.TypeExpression;
029import cascading.flow.planner.iso.finder.SearchOrder;
030import cascading.flow.planner.rule.elementexpression.BoundariesElementExpression;
031import cascading.flow.stream.graph.IORole;
032import cascading.pipe.Boundary;
033import cascading.pipe.Group;
034import cascading.pipe.HashJoin;
035import cascading.pipe.Merge;
036import cascading.tap.Tap;
037
038import static cascading.flow.planner.iso.expression.AndElementExpression.and;
039import static cascading.flow.planner.iso.expression.NotElementExpression.not;
040import static cascading.flow.planner.iso.expression.OrElementExpression.or;
041
042/**
043 *
044 */
045public class BottomUpConsecutiveBoundariesExpressionGraph extends ExpressionGraph
046  {
047  public BottomUpConsecutiveBoundariesExpressionGraph()
048    {
049    super( SearchOrder.ReverseTopological );
050
051    FlowElementExpression shared = new FlowElementExpression( ElementCapture.Secondary, HashJoin.class );
052
053    this.arc(
054      or(
055        new FlowElementExpression( Boundary.class ),
056        new FlowElementExpression( Tap.class ),
057        new FlowElementExpression( Group.class, TypeExpression.Topo.LinearOut ),
058        new FlowElementExpression( Merge.class, TypeExpression.Topo.LinearOut )
059      ),
060
061      PathScopeExpression.ANY,
062
063      shared
064    );
065
066    this.arc(
067      shared,
068
069      PathScopeExpression.ANY,
070
071      or(
072        ElementCapture.Primary,
073
074        and(
075          new BoundariesElementExpression( TypeExpression.Topo.LinearIn ),
076          not( new AnnotationExpression( IORole.sink ) )
077        ),
078
079        and(
080          new BoundariesElementExpression( TypeExpression.Topo.Splice )
081        )
082      )
083    );
084    }
085  }