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.iso.subgraph.partitioner; 022 023import java.util.Collection; 024import java.util.LinkedHashMap; 025import java.util.Map; 026 027import cascading.flow.FlowElement; 028import cascading.flow.planner.PlannerContext; 029import cascading.flow.planner.graph.ElementDirectedGraph; 030import cascading.flow.planner.graph.ElementGraph; 031import cascading.flow.planner.graph.ElementMaskSubGraph; 032import cascading.flow.planner.graph.Extent; 033import cascading.flow.planner.iso.subgraph.GraphPartitioner; 034import cascading.flow.planner.iso.subgraph.Partitions; 035import cascading.util.EnumMultiMap; 036 037/** 038 * 039 */ 040public class WholeGraphPartitioner extends GraphPartitioner 041 { 042 public WholeGraphPartitioner() 043 { 044 } 045 046 public Partitions partition( PlannerContext plannerContext, ElementGraph elementGraph, Collection<FlowElement> excludes ) 047 { 048 Map<ElementGraph, EnumMultiMap> annotatedSubGraphs = new LinkedHashMap<>(); 049 050 // need a safe copy 051 if( elementGraph.containsVertex( Extent.head ) ) 052 elementGraph = new ElementMaskSubGraph( elementGraph, Extent.head, Extent.tail ); 053 054 annotatedSubGraphs.put( new ElementDirectedGraph( elementGraph ), new EnumMultiMap() ); 055 056 return new Partitions( this, elementGraph, annotatedSubGraphs ); 057 } 058 }