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.assertion;
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.rule.RuleAssert;
027import cascading.flow.planner.rule.RuleExpression;
028import cascading.pipe.HashJoin;
029
030import static cascading.flow.planner.rule.PlanPhase.PreBalanceAssembly;
031
032/**
033 * Verifies that there are no {@link cascading.pipe.HashJoin} pipes in the assembly.
034 */
035public class NoHashJoinAssert extends RuleAssert
036  {
037  public NoHashJoinAssert()
038    {
039    super(
040      PreBalanceAssembly,
041
042      new RuleExpression( new ExpressionGraph()
043        .arcs(
044          new FlowElementExpression( ElementCapture.Primary, HashJoin.class )
045        ) ),
046
047      "HashJoins not supported by this rule registry, found {Primary}",
048
049      AssertionType.Unsupported
050    );
051    }
052  }