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.rule.transformer;
022
023import cascading.flow.planner.iso.transformer.ContractedGraphTransformer;
024import cascading.flow.planner.rule.PlanPhase;
025import cascading.flow.planner.rule.RuleExpression;
026import cascading.flow.planner.rule.RuleTransformer;
027
028/**
029 *
030 */
031public class RuleContractedTransformer extends RuleTransformer
032  {
033  public RuleContractedTransformer( PlanPhase phase, RuleExpression ruleExpression )
034    {
035    super( phase, ruleExpression );
036
037    if( subGraphTransformer != null )
038      graphTransformer = new ContractedGraphTransformer( subGraphTransformer, ruleExpression.getMatchExpression() );
039    else if( contractedTransformer != null )
040      graphTransformer = new ContractedGraphTransformer( contractedTransformer, ruleExpression.getMatchExpression() );
041    else
042      graphTransformer = new ContractedGraphTransformer( ruleExpression.getMatchExpression() );
043    }
044  }