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.planner.iso.subgraph.partitioner; 023 024import cascading.flow.planner.iso.ElementAnnotation; 025import cascading.flow.planner.iso.expression.ExpressionGraph; 026import cascading.flow.planner.iso.subgraph.SubGraphIterator; 027import cascading.flow.planner.iso.subgraph.iterator.ExpressionSubGraphIterator; 028import cascading.flow.planner.iso.subgraph.iterator.IncludeRemainderSubGraphIterator; 029import cascading.flow.planner.iso.subgraph.iterator.UniquePathSubGraphIterator; 030 031/** 032 * 033 */ 034public class UniquePathGraphPartitioner extends ExpressionGraphPartitioner 035 { 036 boolean includeRemainders = false; 037 private boolean multiEdge = false; // experimental -- disable 038 039 public UniquePathGraphPartitioner( ExpressionGraph contractionGraph, ExpressionGraph expressionGraph, ElementAnnotation... annotations ) 040 { 041 super( contractionGraph, expressionGraph, annotations ); 042 } 043 044 public UniquePathGraphPartitioner( ExpressionGraph contractionGraph, ExpressionGraph expressionGraph, boolean includeRemainders, ElementAnnotation... annotations ) 045 { 046 super( contractionGraph, expressionGraph, annotations ); 047 this.includeRemainders = includeRemainders; 048 } 049 050 @Override 051 protected SubGraphIterator wrapIterator( ExpressionSubGraphIterator expressionIterator ) 052 { 053 if( !includeRemainders ) 054 return new UniquePathSubGraphIterator( expressionIterator, true, multiEdge ); 055 056 return new IncludeRemainderSubGraphIterator( new UniquePathSubGraphIterator( expressionIterator, true, multiEdge ), multiEdge ); 057 } 058 }