    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  }