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.planner.rule.expressiongraph; 022 023import cascading.flow.planner.iso.expression.ElementCapture; 024import cascading.flow.planner.iso.expression.ElementExpression; 025import cascading.flow.planner.iso.expression.ExpressionGraph; 026import cascading.flow.planner.iso.expression.FlowElementExpression; 027import cascading.flow.planner.iso.expression.OrElementExpression; 028import cascading.flow.planner.iso.expression.PathScopeExpression; 029import cascading.flow.planner.iso.finder.SearchOrder; 030import cascading.pipe.Group; 031import cascading.pipe.HashJoin; 032import cascading.tap.Tap; 033 034import static cascading.flow.planner.iso.expression.OrElementExpression.or; 035 036/** 037 * 038 */ 039public class NonBlockedBlockedJoinJoinExpressionGraph extends ExpressionGraph 040 { 041 public NonBlockedBlockedJoinJoinExpressionGraph() 042 { 043 super( SearchOrder.ReverseDepth ); 044 045 ElementExpression source = OrElementExpression.or( ElementCapture.Primary, new FlowElementExpression( Tap.class ), new FlowElementExpression( Group.class ) ); 046 ElementExpression blocking = or( new FlowElementExpression( HashJoin.class ), new FlowElementExpression( Group.class ) ); 047 ElementExpression sink = new FlowElementExpression( ElementCapture.Secondary, HashJoin.class ); 048 049 this.arc( 050 source, 051 PathScopeExpression.ANY, 052 blocking 053 ); 054 055 this.arc( 056 blocking, 057 PathScopeExpression.ANY, 058 sink 059 ); 060 061 this.arc( 062 source, 063 PathScopeExpression.ANY, 064 sink 065 ); 066 067 } 068 }