    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.tez.planner.rule.expression;
    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.TypeExpression;
    027import cascading.flow.planner.rule.RuleExpression;
    028import cascading.flow.tez.planner.rule.expressiongraph.NoSpliceTapExpressionGraph;
    029import cascading.pipe.Group;
    030import cascading.pipe.Pipe;
    031import cascading.pipe.Splice;
    032
    033/**
    034 *
    035 */
    036public class BalanceGroupSplitSpliceExpression extends RuleExpression
    037  {
    038  public static final FlowElementExpression GROUP = new FlowElementExpression( Group.class );
    039  public static final FlowElementExpression SPLICE = new FlowElementExpression( Splice.class );
    040
    041  public BalanceGroupSplitSpliceExpression()
    042    {
    043    super(
    044      new NoSpliceTapExpressionGraph(),
    045
    046      new ExpressionGraph()
    047        .arcs(
    048          GROUP,
    049          SPLICE )
    050        .arcs(
    051          GROUP,
    052          SPLICE ),
    053
    054      new ExpressionGraph()
    055        .arcs(
    056          new FlowElementExpression( ElementCapture.Primary, Pipe.class, TypeExpression.Topo.SplitOnly )
    057        )
    058    );
    059    }
    060  }