001/* 002 * Copyright (c) 2007-2015 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.hadoop.planner.rule.expression; 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.rule.RuleExpression; 027import cascading.pipe.Checkpoint; 028import cascading.tap.Tap; 029 030import static cascading.flow.planner.iso.expression.NotElementExpression.not; 031 032/** 033 * 034 */ 035public class BalanceCheckpointWithTapExpression extends RuleExpression 036 { 037 public BalanceCheckpointWithTapExpression() 038 { 039 super( 040 new ExpressionGraph() 041 .arcs( 042 new FlowElementExpression( ElementCapture.Primary, true, Checkpoint.class ), 043 not( new FlowElementExpression( Tap.class ) ) 044 ) 045 ); 046 } 047 }