    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.tez.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.PathScopeExpression;
    027import cascading.flow.planner.iso.finder.SearchOrder;
    028import cascading.flow.planner.rule.elementexpression.BoundariesElementExpression;
    029import cascading.pipe.HashJoin;
    030
    031/**
    032 *
    033 */
    034public class AccumulatedSourceExpressionGraph extends ExpressionGraph
    035  {
    036  public AccumulatedSourceExpressionGraph()
    037    {
    038    super( SearchOrder.ReverseDepth );
    039
    040    this.arc(
    041      new BoundariesElementExpression( ElementCapture.Secondary ),
    042
    043      PathScopeExpression.ALL_BLOCKING,
    044
    045      new FlowElementExpression( ElementCapture.Primary, HashJoin.class )
    046    );
    047    }
    048  }