    001/*
    002 * Copyright (c) 2007-2017 Xplenty, 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.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.ScopeExpression;
    027import cascading.flow.planner.iso.finder.SearchOrder;
    028import cascading.pipe.Group;
    029import cascading.tap.Tap;
    030
    031/**
    032 *
    033 */
    034public class GroupTapExpressionGraph extends ExpressionGraph
    035  {
    036  public GroupTapExpressionGraph()
    037    {
    038    super( SearchOrder.ReverseTopological );
    039
    040    this
    041      .arc(
    042        new FlowElementExpression( Group.class ),
    043        ScopeExpression.ALL,
    044        new FlowElementExpression( ElementCapture.Primary, Tap.class )
    045      );
    046    }
    047  }