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.ExpressionGraph; 025import cascading.flow.planner.iso.expression.FlowElementExpression; 026import cascading.flow.planner.iso.expression.ScopeExpression; 027import cascading.flow.planner.iso.finder.SearchOrder; 028import cascading.pipe.Group; 029import cascading.tap.Tap; 030 031/** 032 * 033 */ 034public class TapGroupTapExpressionGraph extends ExpressionGraph 035 { 036 public TapGroupTapExpressionGraph() 037 { 038 super( SearchOrder.ReverseTopological ); 039 040 FlowElementExpression shared = new FlowElementExpression( ElementCapture.Primary, Group.class ); 041 042 this 043 .arc( new FlowElementExpression( Tap.class ), ScopeExpression.ALL, shared ) 044 .arc( shared, ScopeExpression.ALL, new FlowElementExpression( ElementCapture.Primary, Tap.class ) 045 ); 046 } 047 }