001/* 002 * Copyright (c) 2016 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.tez.planner.rule.expressiongraph; 023 024import cascading.flow.planner.iso.expression.AnnotationExpression; 025import cascading.flow.planner.iso.expression.ElementCapture; 026import cascading.flow.planner.iso.expression.ElementExpression; 027import cascading.flow.planner.iso.expression.ExpressionGraph; 028import cascading.flow.planner.iso.expression.FlowElementExpression; 029import cascading.flow.planner.iso.expression.PathScopeExpression; 030import cascading.flow.planner.iso.expression.TypeExpression; 031import cascading.flow.planner.iso.finder.SearchOrder; 032import cascading.flow.planner.rule.elementexpression.BoundariesElementExpression; 033import cascading.flow.stream.graph.IORole; 034import cascading.pipe.Boundary; 035import cascading.pipe.Group; 036import cascading.pipe.HashJoin; 037import cascading.pipe.Merge; 038import cascading.tap.Tap; 039 040import static cascading.flow.planner.iso.expression.AndElementExpression.and; 041import static cascading.flow.planner.iso.expression.NotElementExpression.not; 042import static cascading.flow.planner.iso.expression.OrElementExpression.or; 043 044/** 045 * 046 */ 047public class BottomUpConsecutiveBoundariesExpressionGraph extends ExpressionGraph 048 { 049 public BottomUpConsecutiveBoundariesExpressionGraph() 050 { 051 super( SearchOrder.ReverseTopological ); 052 053 ElementExpression head = or( 054 new FlowElementExpression( Boundary.class ), 055 new FlowElementExpression( Tap.class ), 056 new FlowElementExpression( Group.class, TypeExpression.Topo.LinearOut ), 057 new FlowElementExpression( Merge.class, TypeExpression.Topo.LinearOut ) 058 ); 059 060 FlowElementExpression shared = new FlowElementExpression( ElementCapture.Secondary, HashJoin.class ); 061 062 ElementExpression tail = or( 063 ElementCapture.Primary, 064 and( 065 new BoundariesElementExpression( TypeExpression.Topo.LinearIn ), 066 not( new AnnotationExpression( IORole.sink ) ) 067 ), 068 new BoundariesElementExpression( TypeExpression.Topo.Splice ) 069 ); 070 071 this.arc( 072 head, 073 074 PathScopeExpression.ANY, 075 076 shared 077 ); 078 079 this.arc( 080 shared, 081 082 PathScopeExpression.ANY, 083 084 tail 085 ); 086 } 087 }