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 java.util.Collection; 025import java.util.LinkedHashMap; 026import java.util.Map; 027 028import cascading.flow.FlowElement; 029import cascading.flow.planner.PlannerContext; 030import cascading.flow.planner.graph.ElementGraph; 031import cascading.flow.planner.graph.ElementMaskSubGraph; 032import cascading.flow.planner.graph.ElementMultiGraph; 033import cascading.flow.planner.graph.Extent; 034import cascading.flow.planner.iso.subgraph.GraphPartitioner; 035import cascading.flow.planner.iso.subgraph.Partitions; 036import cascading.util.EnumMultiMap; 037 038/** 039 * 040 */ 041public class WholeGraphPartitioner extends GraphPartitioner 042 { 043 public WholeGraphPartitioner() 044 { 045 } 046 047 public Partitions partition( PlannerContext plannerContext, ElementGraph elementGraph, Collection<FlowElement> excludes ) 048 { 049 Map<ElementGraph, EnumMultiMap> annotatedSubGraphs = new LinkedHashMap<>(); 050 051 // need a safe copy 052 if( elementGraph.containsVertex( Extent.head ) ) 053 elementGraph = new ElementMaskSubGraph( elementGraph, Extent.head, Extent.tail ); 054 055 annotatedSubGraphs.put( new ElementMultiGraph( elementGraph ), new EnumMultiMap() ); 056 057 return new Partitions( this, elementGraph, annotatedSubGraphs ); 058 } 059 }