001/*
002 * Copyright (c) 2016 Chris K Wensel <chris@wensel.net>. All Rights Reserved.
003 * Copyright (c) 2007-2017 Xplenty, Inc. All Rights Reserved.
004 *
005 * Project and contact information: http://www.cascading.org/
006 *
007 * This file is part of the Cascading project.
008 *
009 * Licensed under the Apache License, Version 2.0 (the "License");
010 * you may not use this file except in compliance with the License.
011 * You may obtain a copy of the License at
012 *
013 *     http://www.apache.org/licenses/LICENSE-2.0
014 *
015 * Unless required by applicable law or agreed to in writing, software
016 * distributed under the License is distributed on an "AS IS" BASIS,
017 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
018 * See the License for the specific language governing permissions and
019 * limitations under the License.
020 */
021
022package cascading.flow.planner.rule.transformer;
023
024import cascading.flow.planner.iso.transformer.RemoveBranchGraphTransformer;
025import cascading.flow.planner.rule.PlanPhase;
026import cascading.flow.planner.rule.RuleExpression;
027import cascading.flow.planner.rule.RuleTransformer;
028import cascading.flow.planner.rule.util.LogLevel;
029
030/**
031 *
032 */
033public class RuleRemoveBranchTransformer extends RuleTransformer
034  {
035  public RuleRemoveBranchTransformer( PlanPhase phase, RuleExpression ruleExpression )
036    {
037    this( null, phase, ruleExpression );
038    }
039
040  public RuleRemoveBranchTransformer( LogLevel logLevel, PlanPhase phase, RuleExpression ruleExpression )
041    {
042    super( logLevel, phase, ruleExpression );
043
044    if( subGraphTransformer != null )
045      graphTransformer = new RemoveBranchGraphTransformer( subGraphTransformer, ruleExpression.getMatchExpression() );
046    else if( contractedTransformer != null )
047      graphTransformer = new RemoveBranchGraphTransformer( contractedTransformer, ruleExpression.getMatchExpression() );
048    else
049      graphTransformer = new RemoveBranchGraphTransformer( ruleExpression.getMatchExpression() );
050    }
051  }